Rootbly - AI Subtitle

Watch foreign YouTube videos with translated subtitles. RootblySub automatically translates YouTube subtitles into your language. Just paste a URL and AI creates subtitles you can watch straight away in the built-in player. ◆ CORE FEATURES • AI Subtitle Translation — 32 languages including English, Korean, Japanese, Chinese (Simplified & Traditional) and Spanish • Language Search & Favourites — pin the languages you use most and find any language by name • Built-in Video Player — translated subtitles shown over the video in real time • Read Subtitles Aloud — text-to-speech reads the translated subtitles in your device's voice • Subtitle Sync Control — adjust the timing yourself within ±5 seconds • Subtitle Size Settings — Small/Medium/Large presets with fine-grained control • Original Text Toggle — view the translation with or without the original ◆ SUBTITLE QUALITY • Rate Subtitles — tell us why when a subtitle isn't right • Fix the Source Language — if the spoken language was misidentified, regenerate with the right one ◆ YOUTUBE BROWSING • YouTube Search — find videos without leaving the app • Channel Browser — explore videos, Shorts, playlists and live streams • Channel Favourites — save the channels you watch most • Clipboard Detection — copied YouTube URLs are picked up automatically ◆ TRANSLATION JOBS • Real-time Progress — follow each stage: downloading → transcribing → translating • Push Notifications — get notified the moment a translation is ready • Job History — all your translation requests in one place ◆ CONVENIENCE • Sign in with Google / Apple or use Guest mode • YouTube Premium integration for ad-free viewing • Korean & English UI • Full-screen landscape mode ◆ COMMUNITY • Share feedback and feature ideas in our Discord community — Settings › News & help Enjoy YouTube content from around the world — without language barriers. Terms of Use: https://rootblysub.rootbly.com/terms Privacy Policy: https://rootblysub.rootbly.com/privacy