diff --git a/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model.py b/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model.py
index 0dff7f7d8b1de..b3c7009692f72 100644
--- a/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model.py
+++ b/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model.py
@@ -426,6 +426,7 @@ def __init__(self, scope: Scope, value: Any):
 FnSelect: Final[str] = "Fn::Select"
 FnSplit: Final[str] = "Fn::Split"
 FnGetAZs: Final[str] = "Fn::GetAZs"
+FnBase64: Final[str] = "Fn::Base64"
 INTRINSIC_FUNCTIONS: Final[set[str]] = {
     RefKey,
     FnIfKey,
@@ -439,6 +440,7 @@ def __init__(self, scope: Scope, value: Any):
     FnSelect,
     FnSplit,
     FnGetAZs,
+    FnBase64,
 }
 
 
diff --git a/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model_preproc.py b/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model_preproc.py
index 60f2fd89dcadf..0c3a5fa3805ec 100644
--- a/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model_preproc.py
+++ b/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model_preproc.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import base64
 import re
 from typing import Any, Final, Generic, Optional, TypeVar
 
@@ -45,6 +46,8 @@
 from localstack.services.cloudformation.stores import get_cloudformation_store
 from localstack.services.cloudformation.v2.entities import ChangeSet
 from localstack.utils.aws.arns import get_partition
+from localstack.utils.run import to_str
+from localstack.utils.strings import to_bytes
 from localstack.utils.urls import localstack_host
 
 _AWS_URL_SUFFIX = localstack_host().host  # The value in AWS is "amazonaws.com"
@@ -748,6 +751,31 @@ def _compute_fn_get_a_zs(region) -> Any:
 
         return PreprocEntityDelta(before=before, after=after)
 
+    def visit_node_intrinsic_function_fn_base64(
+        self, node_intrinsic_function: NodeIntrinsicFunction
+    ) -> PreprocEntityDelta:
+        # TODO: add further support for schema validation
+        arguments_delta = self.visit(node_intrinsic_function.arguments)
+        arguments_before = arguments_delta.before
+        arguments_after = arguments_delta.after
+
+        def _compute_fn_base_64(string) -> Any:
+            if not isinstance(string, str):
+                raise RuntimeError(f"Invalid valueToEncode for Fn::Base64: '{string}'")
+            # Ported from v1:
+            base64_string = to_str(base64.b64encode(to_bytes(string)))
+            return base64_string
+
+        before = Nothing
+        if not is_nothing(arguments_before):
+            before = _compute_fn_base_64(arguments_before)
+
+        after = Nothing
+        if not is_nothing(arguments_after):
+            after = _compute_fn_base_64(arguments_after)
+
+        return PreprocEntityDelta(before=before, after=after)
+
     def visit_node_intrinsic_function_fn_find_in_map(
         self, node_intrinsic_function: NodeIntrinsicFunction
     ) -> PreprocEntityDelta:
diff --git a/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model_visitor.py b/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model_visitor.py
index 6f42186bf20ee..fb982d8301f8d 100644
--- a/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model_visitor.py
+++ b/localstack-core/localstack/services/cloudformation/engine/v2/change_set_model_visitor.py
@@ -133,6 +133,11 @@ def visit_node_intrinsic_function_fn_get_a_zs(
     ):
         self.visit_children(node_intrinsic_function)
 
+    def visit_node_intrinsic_function_fn_base64(
+        self, node_intrinsic_function: NodeIntrinsicFunction
+    ):
+        self.visit_children(node_intrinsic_function)
+
     def visit_node_intrinsic_function_fn_sub(self, node_intrinsic_function: NodeIntrinsicFunction):
         self.visit_children(node_intrinsic_function)
 
diff --git a/tests/aws/services/cloudformation/v2/ported_from_v1/test_template_engine.py b/tests/aws/services/cloudformation/v2/ported_from_v1/test_template_engine.py
index d163b595e3365..fe0528f437ad6 100644
--- a/tests/aws/services/cloudformation/v2/ported_from_v1/test_template_engine.py
+++ b/tests/aws/services/cloudformation/v2/ported_from_v1/test_template_engine.py
@@ -109,7 +109,6 @@ def test_and_or_functions(
         bucket_names = [b["Name"] for b in buckets["Buckets"]]
         assert (bucket_name in bucket_names) == expected_bucket_created
 
-    @pytest.mark.skip(reason="CFNV2:Fn::Base64")
     @markers.aws.validated
     def test_base64_sub_and_getatt_functions(self, deploy_cfn_template):
         template_path = os.path.join(
diff --git a/tests/aws/services/cloudformation/v2/test_change_set_fn_base64.py b/tests/aws/services/cloudformation/v2/test_change_set_fn_base64.py
new file mode 100644
index 0000000000000..b8593dad92bd7
--- /dev/null
+++ b/tests/aws/services/cloudformation/v2/test_change_set_fn_base64.py
@@ -0,0 +1,97 @@
+import pytest
+from localstack_snapshot.snapshots.transformer import RegexTransformer
+
+from localstack.services.cloudformation.v2.utils import is_v2_engine
+from localstack.testing.aws.util import is_aws_cloud
+from localstack.testing.pytest import markers
+from localstack.utils.strings import long_uid
+
+
+@pytest.mark.skipif(
+    condition=not is_v2_engine() and not is_aws_cloud(), reason="Requires the V2 engine"
+)
+@markers.snapshot.skip_snapshot_verify(
+    paths=[
+        "per-resource-events..*",
+        "delete-describe..*",
+        #
+        # Before/After Context
+        "$..Capabilities",
+        "$..NotificationARNs",
+        "$..IncludeNestedStacks",
+        "$..Scope",
+        "$..Details",
+        "$..Parameters",
+        "$..Replacement",
+    ]
+)
+class TestChangeSetFnBase64:
+    @markers.aws.validated
+    def test_fn_base64_add_to_static_property(
+        self,
+        snapshot,
+        capture_update_process,
+    ):
+        name1 = f"topic-name-1-{long_uid()}"
+        snapshot.add_transformer(RegexTransformer(name1, "topic-name-1"))
+        template_1 = {
+            "Resources": {
+                "Topic1": {"Type": "AWS::SNS::Topic", "Properties": {"DisplayName": name1}}
+            }
+        }
+        template_2 = {
+            "Resources": {
+                "Topic1": {
+                    "Type": "AWS::SNS::Topic",
+                    "Properties": {"DisplayName": {"Fn::Base64": "HelloWorld"}},
+                }
+            }
+        }
+        capture_update_process(snapshot, template_1, template_2)
+
+    @markers.aws.validated
+    def test_fn_base64_remove_from_static_property(
+        self,
+        snapshot,
+        capture_update_process,
+    ):
+        name1 = f"topic-name-1-{long_uid()}"
+        snapshot.add_transformer(RegexTransformer(name1, "topic-name-1"))
+        template_1 = {
+            "Resources": {
+                "Topic1": {
+                    "Type": "AWS::SNS::Topic",
+                    "Properties": {"DisplayName": {"Fn::Base64": "HelloWorld"}},
+                }
+            }
+        }
+        template_2 = {
+            "Resources": {
+                "Topic1": {"Type": "AWS::SNS::Topic", "Properties": {"DisplayName": name1}}
+            }
+        }
+        capture_update_process(snapshot, template_1, template_2)
+
+    @markers.aws.validated
+    def test_fn_base64_change_input_string(
+        self,
+        snapshot,
+        capture_update_process,
+    ):
+        template_1 = {
+            "Resources": {
+                "Topic1": {
+                    "Type": "AWS::SNS::Topic",
+                    "Properties": {"DisplayName": {"Fn::Base64": "OldValue"}},
+                }
+            }
+        }
+        template_2 = {
+            "Resources": {
+                "Topic1": {
+                    "Type": "AWS::SNS::Topic",
+                    "Properties": {"DisplayName": {"Fn::Base64": "NewValue"}},
+                }
+            }
+        }
+        capture_update_process(snapshot, template_1, template_2)
diff --git a/tests/aws/services/cloudformation/v2/test_change_set_fn_base64.snapshot.json b/tests/aws/services/cloudformation/v2/test_change_set_fn_base64.snapshot.json
new file mode 100644
index 0000000000000..bfec63bc4521b
--- /dev/null
+++ b/tests/aws/services/cloudformation/v2/test_change_set_fn_base64.snapshot.json
@@ -0,0 +1,1136 @@
+{
+  "tests/aws/services/cloudformation/v2/test_change_set_fn_base64.py::TestChangeSetFnBase64::test_fn_base64_add_to_static_property": {
+    "recorded-date": "02-06-2025, 17:27:21",
+    "recorded-content": {
+      "create-change-set-1": {
+        "Id": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-1-prop-values": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Add",
+              "AfterContext": {
+                "Properties": {
+                  "DisplayName": "topic-name-1"
+                }
+              },
+              "Details": [],
+              "LogicalResourceId": "Topic1",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": []
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-1": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Add",
+              "Details": [],
+              "LogicalResourceId": "Topic1",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": []
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "execute-change-set-1": {
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "post-create-1-describe": {
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "CreationTime": "datetime",
+        "DisableRollback": false,
+        "DriftInformation": {
+          "StackDriftStatus": "NOT_CHECKED"
+        },
+        "EnableTerminationProtection": false,
+        "LastUpdatedTime": "datetime",
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "StackStatus": "CREATE_COMPLETE",
+        "Tags": []
+      },
+      "create-change-set-2": {
+        "Id": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-2-prop-values": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Modify",
+              "AfterContext": {
+                "Properties": {
+                  "DisplayName": "SGVsbG9Xb3JsZA=="
+                }
+              },
+              "BeforeContext": {
+                "Properties": {
+                  "DisplayName": "topic-name-1"
+                }
+              },
+              "Details": [
+                {
+                  "ChangeSource": "DirectModification",
+                  "Evaluation": "Static",
+                  "Target": {
+                    "AfterValue": "SGVsbG9Xb3JsZA==",
+                    "Attribute": "Properties",
+                    "AttributeChangeType": "Modify",
+                    "BeforeValue": "topic-name-1",
+                    "Name": "DisplayName",
+                    "Path": "/Properties/DisplayName",
+                    "RequiresRecreation": "Never"
+                  }
+                }
+              ],
+              "LogicalResourceId": "Topic1",
+              "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+              "Replacement": "False",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": [
+                "Properties"
+              ]
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-2": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Modify",
+              "Details": [
+                {
+                  "ChangeSource": "DirectModification",
+                  "Evaluation": "Static",
+                  "Target": {
+                    "Attribute": "Properties",
+                    "Name": "DisplayName",
+                    "RequiresRecreation": "Never"
+                  }
+                }
+              ],
+              "LogicalResourceId": "Topic1",
+              "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+              "Replacement": "False",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": [
+                "Properties"
+              ]
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "execute-change-set-2": {
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "post-create-2-describe": {
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "CreationTime": "datetime",
+        "DisableRollback": false,
+        "DriftInformation": {
+          "StackDriftStatus": "NOT_CHECKED"
+        },
+        "EnableTerminationProtection": false,
+        "LastUpdatedTime": "datetime",
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "StackStatus": "UPDATE_COMPLETE",
+        "Tags": []
+      },
+      "per-resource-events": {
+        "Topic1": [
+          {
+            "EventId": "Topic1-UPDATE_COMPLETE-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "SGVsbG9Xb3JsZA=="
+            },
+            "ResourceStatus": "UPDATE_COMPLETE",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-UPDATE_IN_PROGRESS-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "SGVsbG9Xb3JsZA=="
+            },
+            "ResourceStatus": "UPDATE_IN_PROGRESS",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-CREATE_COMPLETE-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "topic-name-1"
+            },
+            "ResourceStatus": "CREATE_COMPLETE",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-CREATE_IN_PROGRESS-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "topic-name-1"
+            },
+            "ResourceStatus": "CREATE_IN_PROGRESS",
+            "ResourceStatusReason": "Resource creation Initiated",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-CREATE_IN_PROGRESS-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "",
+            "ResourceProperties": {
+              "DisplayName": "topic-name-1"
+            },
+            "ResourceStatus": "CREATE_IN_PROGRESS",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          }
+        ],
+        "<stack-name:1>": [
+          {
+            "EventId": "<uuid:1>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "UPDATE_COMPLETE",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:2>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "UPDATE_COMPLETE_CLEANUP_IN_PROGRESS",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:3>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "UPDATE_IN_PROGRESS",
+            "ResourceStatusReason": "User Initiated",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:4>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "CREATE_COMPLETE",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:5>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "CREATE_IN_PROGRESS",
+            "ResourceStatusReason": "User Initiated",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:6>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "REVIEW_IN_PROGRESS",
+            "ResourceStatusReason": "User Initiated",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          }
+        ]
+      },
+      "delete-describe": {
+        "CreationTime": "datetime",
+        "DeletionTime": "datetime",
+        "DisableRollback": false,
+        "DriftInformation": {
+          "StackDriftStatus": "NOT_CHECKED"
+        },
+        "LastUpdatedTime": "datetime",
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "StackStatus": "DELETE_COMPLETE",
+        "Tags": []
+      }
+    }
+  },
+  "tests/aws/services/cloudformation/v2/test_change_set_fn_base64.py::TestChangeSetFnBase64::test_fn_base64_remove_from_static_property": {
+    "recorded-date": "02-06-2025, 17:28:46",
+    "recorded-content": {
+      "create-change-set-1": {
+        "Id": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-1-prop-values": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Add",
+              "AfterContext": {
+                "Properties": {
+                  "DisplayName": "SGVsbG9Xb3JsZA=="
+                }
+              },
+              "Details": [],
+              "LogicalResourceId": "Topic1",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": []
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-1": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Add",
+              "Details": [],
+              "LogicalResourceId": "Topic1",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": []
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "execute-change-set-1": {
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "post-create-1-describe": {
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "CreationTime": "datetime",
+        "DisableRollback": false,
+        "DriftInformation": {
+          "StackDriftStatus": "NOT_CHECKED"
+        },
+        "EnableTerminationProtection": false,
+        "LastUpdatedTime": "datetime",
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "StackStatus": "CREATE_COMPLETE",
+        "Tags": []
+      },
+      "create-change-set-2": {
+        "Id": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-2-prop-values": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Modify",
+              "AfterContext": {
+                "Properties": {
+                  "DisplayName": "topic-name-1"
+                }
+              },
+              "BeforeContext": {
+                "Properties": {
+                  "DisplayName": "SGVsbG9Xb3JsZA=="
+                }
+              },
+              "Details": [
+                {
+                  "ChangeSource": "DirectModification",
+                  "Evaluation": "Static",
+                  "Target": {
+                    "AfterValue": "topic-name-1",
+                    "Attribute": "Properties",
+                    "AttributeChangeType": "Modify",
+                    "BeforeValue": "SGVsbG9Xb3JsZA==",
+                    "Name": "DisplayName",
+                    "Path": "/Properties/DisplayName",
+                    "RequiresRecreation": "Never"
+                  }
+                }
+              ],
+              "LogicalResourceId": "Topic1",
+              "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+              "Replacement": "False",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": [
+                "Properties"
+              ]
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-2": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Modify",
+              "Details": [
+                {
+                  "ChangeSource": "DirectModification",
+                  "Evaluation": "Static",
+                  "Target": {
+                    "Attribute": "Properties",
+                    "Name": "DisplayName",
+                    "RequiresRecreation": "Never"
+                  }
+                }
+              ],
+              "LogicalResourceId": "Topic1",
+              "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+              "Replacement": "False",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": [
+                "Properties"
+              ]
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "execute-change-set-2": {
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "post-create-2-describe": {
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "CreationTime": "datetime",
+        "DisableRollback": false,
+        "DriftInformation": {
+          "StackDriftStatus": "NOT_CHECKED"
+        },
+        "EnableTerminationProtection": false,
+        "LastUpdatedTime": "datetime",
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "StackStatus": "UPDATE_COMPLETE",
+        "Tags": []
+      },
+      "per-resource-events": {
+        "Topic1": [
+          {
+            "EventId": "Topic1-UPDATE_COMPLETE-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "topic-name-1"
+            },
+            "ResourceStatus": "UPDATE_COMPLETE",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-UPDATE_IN_PROGRESS-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "topic-name-1"
+            },
+            "ResourceStatus": "UPDATE_IN_PROGRESS",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-CREATE_COMPLETE-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "SGVsbG9Xb3JsZA=="
+            },
+            "ResourceStatus": "CREATE_COMPLETE",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-CREATE_IN_PROGRESS-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "SGVsbG9Xb3JsZA=="
+            },
+            "ResourceStatus": "CREATE_IN_PROGRESS",
+            "ResourceStatusReason": "Resource creation Initiated",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-CREATE_IN_PROGRESS-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "",
+            "ResourceProperties": {
+              "DisplayName": "SGVsbG9Xb3JsZA=="
+            },
+            "ResourceStatus": "CREATE_IN_PROGRESS",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          }
+        ],
+        "<stack-name:1>": [
+          {
+            "EventId": "<uuid:1>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "UPDATE_COMPLETE",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:2>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "UPDATE_COMPLETE_CLEANUP_IN_PROGRESS",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:3>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "UPDATE_IN_PROGRESS",
+            "ResourceStatusReason": "User Initiated",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:4>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "CREATE_COMPLETE",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:5>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "CREATE_IN_PROGRESS",
+            "ResourceStatusReason": "User Initiated",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:6>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "REVIEW_IN_PROGRESS",
+            "ResourceStatusReason": "User Initiated",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          }
+        ]
+      },
+      "delete-describe": {
+        "CreationTime": "datetime",
+        "DeletionTime": "datetime",
+        "DisableRollback": false,
+        "DriftInformation": {
+          "StackDriftStatus": "NOT_CHECKED"
+        },
+        "LastUpdatedTime": "datetime",
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "StackStatus": "DELETE_COMPLETE",
+        "Tags": []
+      }
+    }
+  },
+  "tests/aws/services/cloudformation/v2/test_change_set_fn_base64.py::TestChangeSetFnBase64::test_fn_base64_change_input_string": {
+    "recorded-date": "02-06-2025, 17:30:12",
+    "recorded-content": {
+      "create-change-set-1": {
+        "Id": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-1-prop-values": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Add",
+              "AfterContext": {
+                "Properties": {
+                  "DisplayName": "T2xkVmFsdWU="
+                }
+              },
+              "Details": [],
+              "LogicalResourceId": "Topic1",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": []
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-1": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Add",
+              "Details": [],
+              "LogicalResourceId": "Topic1",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": []
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "execute-change-set-1": {
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "post-create-1-describe": {
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:1>",
+        "CreationTime": "datetime",
+        "DisableRollback": false,
+        "DriftInformation": {
+          "StackDriftStatus": "NOT_CHECKED"
+        },
+        "EnableTerminationProtection": false,
+        "LastUpdatedTime": "datetime",
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "StackStatus": "CREATE_COMPLETE",
+        "Tags": []
+      },
+      "create-change-set-2": {
+        "Id": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-2-prop-values": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Modify",
+              "AfterContext": {
+                "Properties": {
+                  "DisplayName": "TmV3VmFsdWU="
+                }
+              },
+              "BeforeContext": {
+                "Properties": {
+                  "DisplayName": "T2xkVmFsdWU="
+                }
+              },
+              "Details": [
+                {
+                  "ChangeSource": "DirectModification",
+                  "Evaluation": "Static",
+                  "Target": {
+                    "AfterValue": "TmV3VmFsdWU=",
+                    "Attribute": "Properties",
+                    "AttributeChangeType": "Modify",
+                    "BeforeValue": "T2xkVmFsdWU=",
+                    "Name": "DisplayName",
+                    "Path": "/Properties/DisplayName",
+                    "RequiresRecreation": "Never"
+                  }
+                }
+              ],
+              "LogicalResourceId": "Topic1",
+              "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+              "Replacement": "False",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": [
+                "Properties"
+              ]
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "describe-change-set-2": {
+        "Capabilities": [],
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "ChangeSetName": "<change-set-id:1>",
+        "Changes": [
+          {
+            "ResourceChange": {
+              "Action": "Modify",
+              "Details": [
+                {
+                  "ChangeSource": "DirectModification",
+                  "Evaluation": "Static",
+                  "Target": {
+                    "Attribute": "Properties",
+                    "Name": "DisplayName",
+                    "RequiresRecreation": "Never"
+                  }
+                }
+              ],
+              "LogicalResourceId": "Topic1",
+              "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+              "Replacement": "False",
+              "ResourceType": "AWS::SNS::Topic",
+              "Scope": [
+                "Properties"
+              ]
+            },
+            "Type": "Resource"
+          }
+        ],
+        "CreationTime": "datetime",
+        "ExecutionStatus": "AVAILABLE",
+        "IncludeNestedStacks": false,
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "Status": "CREATE_COMPLETE",
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "execute-change-set-2": {
+        "ResponseMetadata": {
+          "HTTPHeaders": {},
+          "HTTPStatusCode": 200
+        }
+      },
+      "post-create-2-describe": {
+        "ChangeSetId": "arn:<partition>:cloudformation:<region>:111111111111:changeSet/<resource:3>",
+        "CreationTime": "datetime",
+        "DisableRollback": false,
+        "DriftInformation": {
+          "StackDriftStatus": "NOT_CHECKED"
+        },
+        "EnableTerminationProtection": false,
+        "LastUpdatedTime": "datetime",
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "StackStatus": "UPDATE_COMPLETE",
+        "Tags": []
+      },
+      "per-resource-events": {
+        "Topic1": [
+          {
+            "EventId": "Topic1-UPDATE_COMPLETE-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "TmV3VmFsdWU="
+            },
+            "ResourceStatus": "UPDATE_COMPLETE",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-UPDATE_IN_PROGRESS-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "TmV3VmFsdWU="
+            },
+            "ResourceStatus": "UPDATE_IN_PROGRESS",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-CREATE_COMPLETE-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "T2xkVmFsdWU="
+            },
+            "ResourceStatus": "CREATE_COMPLETE",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-CREATE_IN_PROGRESS-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "arn:<partition>:sns:<region>:111111111111:<resource:4>",
+            "ResourceProperties": {
+              "DisplayName": "T2xkVmFsdWU="
+            },
+            "ResourceStatus": "CREATE_IN_PROGRESS",
+            "ResourceStatusReason": "Resource creation Initiated",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "Topic1-CREATE_IN_PROGRESS-date",
+            "LogicalResourceId": "Topic1",
+            "PhysicalResourceId": "",
+            "ResourceProperties": {
+              "DisplayName": "T2xkVmFsdWU="
+            },
+            "ResourceStatus": "CREATE_IN_PROGRESS",
+            "ResourceType": "AWS::SNS::Topic",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          }
+        ],
+        "<stack-name:1>": [
+          {
+            "EventId": "<uuid:1>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "UPDATE_COMPLETE",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:2>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "UPDATE_COMPLETE_CLEANUP_IN_PROGRESS",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:3>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "UPDATE_IN_PROGRESS",
+            "ResourceStatusReason": "User Initiated",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:4>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "CREATE_COMPLETE",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:5>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "CREATE_IN_PROGRESS",
+            "ResourceStatusReason": "User Initiated",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          },
+          {
+            "EventId": "<uuid:6>",
+            "LogicalResourceId": "<stack-name:1>",
+            "PhysicalResourceId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "ResourceStatus": "REVIEW_IN_PROGRESS",
+            "ResourceStatusReason": "User Initiated",
+            "ResourceType": "AWS::CloudFormation::Stack",
+            "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+            "StackName": "<stack-name:1>",
+            "Timestamp": "timestamp"
+          }
+        ]
+      },
+      "delete-describe": {
+        "CreationTime": "datetime",
+        "DeletionTime": "datetime",
+        "DisableRollback": false,
+        "DriftInformation": {
+          "StackDriftStatus": "NOT_CHECKED"
+        },
+        "LastUpdatedTime": "datetime",
+        "NotificationARNs": [],
+        "RollbackConfiguration": {},
+        "StackId": "arn:<partition>:cloudformation:<region>:111111111111:stack/<stack-name:1>/<resource:2>",
+        "StackName": "<stack-name:1>",
+        "StackStatus": "DELETE_COMPLETE",
+        "Tags": []
+      }
+    }
+  }
+}
diff --git a/tests/aws/services/cloudformation/v2/test_change_set_fn_base64.validation.json b/tests/aws/services/cloudformation/v2/test_change_set_fn_base64.validation.json
new file mode 100644
index 0000000000000..b29b77f2c4405
--- /dev/null
+++ b/tests/aws/services/cloudformation/v2/test_change_set_fn_base64.validation.json
@@ -0,0 +1,29 @@
+{
+  "tests/aws/services/cloudformation/v2/test_change_set_fn_base64.py::TestChangeSetFnBase64::test_fn_base64_add_to_static_property": {
+    "last_validated_date": "2025-06-02T17:27:21+00:00",
+    "durations_in_seconds": {
+      "setup": 0.81,
+      "call": 83.7,
+      "teardown": 0.1,
+      "total": 84.61
+    }
+  },
+  "tests/aws/services/cloudformation/v2/test_change_set_fn_base64.py::TestChangeSetFnBase64::test_fn_base64_change_input_string": {
+    "last_validated_date": "2025-06-02T17:30:12+00:00",
+    "durations_in_seconds": {
+      "setup": 0.0,
+      "call": 85.51,
+      "teardown": 0.1,
+      "total": 85.61
+    }
+  },
+  "tests/aws/services/cloudformation/v2/test_change_set_fn_base64.py::TestChangeSetFnBase64::test_fn_base64_remove_from_static_property": {
+    "last_validated_date": "2025-06-02T17:28:46+00:00",
+    "durations_in_seconds": {
+      "setup": 0.0,
+      "call": 84.58,
+      "teardown": 0.1,
+      "total": 84.68
+    }
+  }
+}