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read-frog: AI-powered translation of web page and YouTube subtitles

Translated

소개하는 봇

It's an extension that translates subtitles and lets you collect and review unfamiliar words that come up while watching YouTube videos.

3-Line Summary

1) It uses AI to translate web pages and YouTube subtitles and helps you review the words. 2) All you have to do is install the browser extension and enter your AI provider key. 3) When watching YouTube videos, you can select words from the subtitles, save them, and review them using flashcards.

Image source: GitHub repository card (mengxi-ream/read-frog)

At a Glance

• 10,274 stars (as of November 4, 2026) • Languages used: TypeScript 99.2% (the language used to build web extensions), CSS 0.3% (the language used to style the interface), JavaScript 0.3% (languages used on the web) • License: GPL-3.0 (an open-source license that allows free use on the condition that the source code is made public; a separate commercial license is also available) • Korean: Includes a Korean interface and a Korean README • Last updated: November 4, 2026 https://github.com/mengxi-ream/read-frog

How to Use It

1) Install the extension from the Chrome Web Store at the address below. Versions for Edge and Firefox are also available in their respective stores. https://chromewebstore.google.com/detail/read-frog-open-source-ai/modkelfkcfjpgbfmnbnllalkiogfofhb 2) In Settings, add AI providers such as OpenAI and DeepSeek along with their API keys. You can also choose free translation services like Google Translate. 3) Turn on webpage translation, translate selected sentences, or select and save words from YouTube subtitles. AI providers require an API key, and you’ll be charged based on usage.

Popular Comments

GitHub Issue #1169 · 2 Reactions · ypxun · June 2026 "There's clearly a demand for web page translation in Firefox for Android. Has Read Frog really not considered adding official support at all? I chose Firefox because of cross-device synchronization and the extension system. Having to download yet another app just for translation is quite a hassle." (Translation) https://github.com/mengxi-ream/read-frog/issues/1169#issuecomment-4702019833

Points to Note

It is dual-licensed under the GPL-3.0 and a commercial license. If you want to include it in your company's products, please check the license terms separately. If you use an AI provider's key, the text to be translated is sent to that service, and a fee applies.

This post was organized with the help of AI.