Read Frog is a TypeScript-based browser extension for language learning and translation, with 8,887 stars and GPL-3.0 license. It offers features like bilingual/translation modes, selection translation, context-aware translation, subtitle translation, TTS, batch requests, and 20+ AI providers.
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What it is
Read Frog is a browser extension for language learning and translation, implemented in TypeScript. The project describes itself as an open-source AI-powered language learning extension for browsers, supporting immersive translation, article analysis, multiple AI models, and more.
How it works
The extension provides several features that integrate into the browsing experience:
- Custom AI Actions to transform selected text into reusable tools (prompts, providers, models, and outputs)
- Flashcards & Spaced Repetition via Notebase for vocabulary study
- Bilingual / Translation Only modes with automatic re-translation when switching modes
- Selection Translation with a toolbar offering Translate, Explain, Speak
- Context-Aware Translation by providing page title and a concise Markdown version of content to AI
- Subtitle Translation for YouTube videos
- Text-to-Speech (TTS) using Edge TTS with per-language voice mapping and sentence-aware chunking
- Batch Requests to reduce API costs with retry logic and fallback
- Access to 20+ AI Providers through Vercel AI SDK, plus free options like Google Translate and Microsoft Translate
Getting started
The README includes a Getting Started/Download section, listing supported browsers (Chrome, Edge, Firefox) and store links for installation. It also notes the project is under active development and invites issue feedback.
Install/Usage commands
The README excerpts include various setup and usage references, but only install/usage commands present in the README should be quoted here if provided. The provided FACTS do not contain explicit terminal install commands to quote.
Recent releases
Latest releases include:
- v1.45.1 (2026-08-02) Patch Changes
- v1.45.0 (2026-08-01) Minor Changes
- v1.44.1 (2026-07-31) Patch Changes
- v1.44.0 (2026-07-31) Minor Changes
- v1.43.6 (2026-07-30) Patch Changes
Traction
The repository has 8,887 stars. (Note: numbers are taken as raw counts from the facts.)
Behind the repo
Not included in the provided facts beyond the project URL group and licensing details; no additional company/brand linkage is specified here.
Caveats
Licensing: Read Frog is dual-licensed under GPL-3.0 and a commercial license. Commercial license grant details are described as: Meituan Tabbit Browser Team provides free license for closed-source commercial use limited to v1.21.3 and earlier versions, granted on March 3, 2026. The repository age shows created on 2025-04-16 and last push on 2026-08-04. It is open-source, with 94 open issues.