LibreTranslate

A free, self-hostable translation API.

Editorially reviewedChecked Oct 2026How we review·6 visited this week

translation#practical-oss#open-source#self-hosted#translation

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Free plan API Self-hosted Offline mode

Toolglade’s take

Best for teams that need self-hosted, private translation and can accept quality that trails Google or DeepL, particularly on less-resourced languages. If you need the highest accuracy and don't mind sending text to a cloud vendor, a commercial API will translate better. The AGPL-3.0 license is worth checking before you embed it in a proprietary network service.

Should you use LibreTranslate?

Biggest strength: Fully self-hostable, so text never leaves your infrastructure
Biggest weakness: Translation quality generally lags commercial engines, especially for low-resource languages
Pricing: Free plan
Top alternative: Microsoft Translator · see all

Facts & pricing last checked October 2026. How we review

About LibreTranslate

LibreTranslate is an open-source machine-translation service and API that translates text between many languages. You run it on your own server, with no per-word cost and no data sent to third parties.

LibreTranslate is a free, open-source machine-translation service and REST API that you run entirely on your own hardware. Unlike cloud services from Google or Microsoft, it relies on no proprietary back end: its translation engine is powered by the open-source Argos Translate library and its language models, so text never leaves your infrastructure. It ships with a simple web UI for quick translations and a documented HTTP API for programmatic use. You install it with pip or run the official Docker image, then download the language pairs you need. Because it is self-hosted, it suits developers, privacy-conscious teams, and organizations with data-residency rules who want translation without per-character cloud fees or sending sensitive text to third parties. Translation quality is generally below the big commercial engines, especially for less common languages, but it is fully under your control.

Weighing your options?See how LibreTranslate compares to the alternatives.

Pros & cons

Pros

Fully self-hostable, so text never leaves your infrastructure
Free and open source with no per-character or per-request fees
Clean REST API plus a built-in web UI for quick translations
Official Docker image and pip package make setup straightforward
No dependency on proprietary engines like Google or Azure

Cons

Translation quality generally lags commercial engines, especially for low-resource languages
AGPL-3.0 copyleft can be a problem for proprietary or SaaS integrations
Language models must be downloaded and add storage and memory overhead
You own all the hosting, scaling, and maintenance work yourself