Translation quality
Build products and integrations on top of DeepL’s best-in-class AI translation technology.
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Build multilingual experiences with the DeepL API
Best-in-class translation. Customizability. Maximum data security.
The developer-friendly, enterprise-ready translation API
Custom translations
Handle brand terms and technical jargon with ease. Customize translations at scale with glossaries.
Advanced data security
Enjoy world-leading data protection and deletion of your text immediately after translation.
HTML & XML handling
Translate text that contains XML or HTML markup. Simplify web content translation.
Document translation
Translate entire Word, PowerPoint, PDF, text, and HTML files.
Language detection
Detect unknown source languages reliably with our language detection feature.
Formality
Be sure your translations say it the right way with formal/informal tone of voice awareness.
Open-source client libraries
Let developers build in their preferred programming language and ecosystem.
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What can you do with the DeepL API?
With API access to DeepL's machine translation technology, you can make your content, apps, and products multilingual.
App and website translation
Automate app and website translation and expand to new markets in a way that scales—even with a large content catalog.
Multilingual business communications
Integrate DeepL translations with your company’s internal systems. Enable multilingual teams to communicate securely and efficiently.
Translation-capable products
Let your end users break down language barriers. Add translation as a differentiating feature in your product.
"So why DeepL? […] The main reason overall is quality of the translation. This results in more website traffic that can be monetized, and that can also result in better magazine content that we otherwise wouldn’t have."
Dennis DirdjajaDirector of Operations at Spektrum der Wissenschaft
Trusted by top companies worldwide
Weglot
Weglot uses the DeepL API to help over 50,000 companies build multilingual websites and manage their translations in one place.
Kazar
Luxury fashion brand Kazar uses DeepL to grow revenue with high ROI via e-commerce marketplaces.
24translate
Premium translation agency 24translate uses the DeepL API to deliver industry-leading speed and flexibility to its customers.
We speak your (programming) language
The DeepL API offers officially-supported client libraries in Python, .NET, Node.js, PHP, Ruby, and Java.
Need to generate your own client? There's an OpenAPI spec for that.
Get in touch
Built something cool with our API? Need help? Just want to say hi? Reach out to us—we’d love to hear from you!
Join the community
Join a growing community of DeepL API developers.
Build with us on GitHub
Check out our open-source client libraries, projects, and code samples. Contribute your own suggestions and examples.
Test with Postman
Fork our official Postman collection to start testing and building your DeepL integration.