The Best Free Translation APIs Compared (2026)
Compare free neural machine translation APIs supporting 100+ languages. Find the best fit for your project.
Adding multi-language support to your application doesn't require expensive enterprise solutions. These free translation APIs offer high-quality neural machine translation with generous free tiers.
1. TranslateAI - Neural Machine Translation
Supports 120+ language pairs with context-aware translations powered by transformer models. 500K characters per month free.
curl -X POST https://freeapitools.dev/api/v1/translate \
-d '{
"text": "Hello world, how are you?",
"target": "es",
"source": "en"
}'
# Response:
# {"translated": "Hola mundo, ¿cómo estás?", "source_lang": "en", "confidence": 0.98}
2. LanguageDetect - Automatic Language Detection
Identify the language of any text with confidence scores. Supports 200+ languages and dialects. 10,000 free requests per month.
3. Transliterate - Script Conversion
Convert text between writing systems: Latin, Cyrillic, Arabic, Devanagari, Chinese Pinyin, Japanese Romaji, and more. 5,000 requests/month free.
Feature Comparison
| API | Languages | Free Tier | Best For |
|---|---|---|---|
| TranslateAI | 120+ pairs | 500K chars/mo | General translation |
| LanguageDetect | 200+ | 10K requests/mo | Auto-detection |
| Transliterate | Multiple scripts | 5K requests/mo | Script conversion |
Integration Tips
Combine LanguageDetect with TranslateAI for automatic translation without requiring users to specify their language. Cache translations to reduce API calls and improve response times.
Get Started
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