LibreTranslate

API

Free Open-Source Translation API with 17 Languages Support

Overview

LibreTranslate is an open-source RESTful API for text translation, supporting 17 languages (e.g., English, Spanish, French, German). Key endpoints include POST /translate (for text translation with source/target language parameters) and GET /languages (to list supported languages). Responses are in JSON format. Ideal use cases: integrate translation into apps, websites, or tools without proprietary lock-in; self-host for privacy-sensitive projects; add multilingual support to content management systems or automation workflows.

Example Integration (JavaScript)

script.js JS


fetch('https://libretranslate.com/docs')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API
JSON Response Format
17 Supported Languages
Open-Source
No API Key Required (Public Instances)
Self-Hostable

Frequently Asked Questions

? Is LibreTranslate free to use?

Yes, LibreTranslate is completely free and open-source. You can use public instances without cost or self-host it for free.

? Does it require an API Key?

Public instances of LibreTranslate do not require an API key. For self-hosted deployments, you can optionally enable API key authentication.

? What is the response format?

All responses from LibreTranslate are in JSON format, which is easy to parse and integrate into various applications.

Top Alternatives

Google Translate API Search Google

DeepL API Search Google

Microsoft Translator API Search Google

Tool Info

Pricing Free

Category Text Analysis

Platform Public API

Pros

⊕ Free & Open-Source
⊕ Easy Integration
⊕ No API Key for Public Use
⊕ Self-Host Option for Privacy
⊕ Supports Multiple Languages

Cons

⊖ Public Instances Have Rate Limits
⊖ Limited Language Count (17)
⊖ Slower Than Proprietary APIs
⊖ No Official SLA for Public Use