Introduction

Get an API Key and Get Started

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

Step 1: Sign up for the DeepL API at https://www.deepl.com/en/pro#developer

Step 2: Test your API key with a request.

Here are a few simple options that you can start with. Choose any one and replace{YOUR_API_KEY}with your own key.

Curl
Python
NodeJS

Open a terminal.

Set the API key

export API_KEY={YOUR_API_KEY}

Sample request

curl -X POST https://api.deepl.com/v2/translate \
  --header "Content-Type: application/json" \
  --header "Authorization: DeepL-Auth-Key $API_KEY" \
  --data '{
    "text": ["Hello world!"], 
    "target_lang": "DE"
}'

Sample response

{
  "translations": [
    {
      "detected_source_language": "EN",
      "text": "Hallo, Welt!"
    }
  ]
}

Note: If you are on a free API account, you can replace https://api.deepl.com with https://api-free.deepl.com.

Step 3: Keep building with our client libraries and how-to guides.

You can use our API with popular programming languages (Python, JavaScript, .NET, PHP, Java, Ruby). Click here to learn more about our client libraries. You can also click here to find more examples and guides.

Start Developing

Cookbook - Explore a large variety of examples from both internal and external contributors for using the DeepL API for different applications.
Guides - Discover additional examples and guides for using the DeepL API.
Your First API Request - Get started quickly with DeepL.