diff --git a/src/Symfony/Component/Validator/Constraints/Base64Encoded.php b/src/Symfony/Component/Validator/Constraints/Base64Encoded.php
new file mode 100644
index 0000000000000..9195dc5f1733f
--- /dev/null
+++ b/src/Symfony/Component/Validator/Constraints/Base64Encoded.php
@@ -0,0 +1,25 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * Ensures that the value is a valid Base64-encoded.
+ *
+ * @author Refat Alsakka <refatalsakka@gmail.com>
+ */
+#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
+class Base64Encoded extends Constraint
+{
+    public string $message = 'The string "{{ value }}" is not a valid Base64-encoded value.';
+}
diff --git a/src/Symfony/Component/Validator/Constraints/Base64EncodedValidator.php b/src/Symfony/Component/Validator/Constraints/Base64EncodedValidator.php
new file mode 100644
index 0000000000000..d0d19813f9eca
--- /dev/null
+++ b/src/Symfony/Component/Validator/Constraints/Base64EncodedValidator.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+/**
+ * @author Refat Alsakka <refatalsakka@gmail.com>
+ */
+class Base64EncodedValidator extends ConstraintValidator
+{
+    public function validate(mixed $value, Constraint $constraint): void
+    {
+        if (!$constraint instanceof Base64Encoded) {
+            throw new UnexpectedTypeException($constraint, Base64Encoded::class);
+        }
+
+        if (!$this->isValidBase64($value)) {
+            $this->context->buildViolation($constraint->message)
+                ->setParameter('{{ value }}', $value)
+                ->addViolation();
+        }
+    }
+
+    private function isValidBase64(string $value): bool
+    {
+        return base64_encode(base64_decode($value, true)) == $value;
+    }
+}
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/Base64EncodedValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/Base64EncodedValidatorTest.php
new file mode 100644
index 0000000000000..71bf93615be70
--- /dev/null
+++ b/src/Symfony/Component/Validator/Tests/Constraints/Base64EncodedValidatorTest.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Tests\Constraints;
+
+use Symfony\Component\Validator\Constraints\Base64Encoded;
+use Symfony\Component\Validator\Constraints\Base64EncodedValidator;
+use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
+
+/**
+ * @author Refat Alsakka <refatalsakka@gmail.com>
+ */
+class Base64EncodedValidatorTest extends ConstraintValidatorTestCase
+{
+    protected function createValidator(): Base64EncodedValidator
+    {
+        return new Base64EncodedValidator();
+    }
+
+    public function testValidBase64()
+    {
+        $this->validator->validate('U3ltZm9ueQ==', new Base64Encoded());
+        $this->assertNoViolation();
+    }
+
+    public function testInvalidBase64()
+    {
+        $this->validator->validate('invalid@base64', new Base64Encoded());
+
+        $this->buildViolation('The value "{{ value }}" is not a valid Base64-encoded string.')
+            ->setParameter('{{ value }}', 'invalid@base64')
+            ->assertRaised();
+    }
+}