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Get an API key and get started

New user? Follow these quick steps to get started with the DeepL API.
1

Sign up for the API

Visit our plans page, choose a plan, and sign up.
If you already have a DeepL Translator account, you will need to log out and create a new account for the DeepL API.
2

Step 2: Test your API key with a request

Find your API key here. Then try making a simple translation request in one of these ways:If you use the sample code below, be sure to replace {YOUR_API_KEY} with your own API key.
  • HTTP Request
  • cURL
  • Python
  • JavaScript
  • PHP
  • C#
  • Java
  • Ruby
If you chose a free API plan and you are writing cURL or HTTP requests, replace https://api.deepl.com with https://api-free.deepl.com.
Sample request
POST /v2/translate HTTP/2
Host: api.deepl.com
Authorization: DeepL-Auth-Key [yourAuthKey] 
User-Agent: YourApp/1.2.3
Content-Length: 45
Content-Type: application/json

{"text":["Hello, world!"],"target_lang":"DE"}
Sample response
{
  "translations": [
    {
      "detected_source_language": "EN",
      "text": "Hallo, Welt!"
    }
  ]
}
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Step 3: Keep building with our client libraries and how-to guides

Our official client libraries let you use the API with six popular programming languages - Python, JavaScript, PHP, .NET, Java, or Ruby. The DeepL community has contributed client libraries for other languages, including Dart, Go, and Rust. You may also wish to check out these examples and guides.

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Keep exploring

  • Your first API request - With just a few lines of code, make your first request to the DeepL Translate or Write API
  • DeepL 101 - A quick guide to text and document translation, using Postman to play with the API, client libraries for your favorite programming language, and joining our developer community
  • Cookbook - Explore short tutorials, examples, projects, and use cases
  • Guides - Discover in-depth explanations for API features and real-world applications

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Community and Support

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Status Page

Release Notes