This is a free online subtitle translation tool powered by large language models. Upload SRT, VTT or ASS files and translate subtitles between English, Chinese, Japanese, Korean, Spanish, French and 15+ other languages. No signup, no installation, no watermark — open it in a browser and start translating. Subtitle data stays in your browser unless you enable cloud translation.
Key features: SRT, VTT and ASS parsing and AI translation, smart sentence merging (when one sentence spans multiple cues, cues are merged, translated, then split back across the original timeline), timeline alignment, automatic line wrapping for CJK and Western text, filler-word removal, custom terminology handling, and selectable translation styles. Export standard SRT, VTT, ASS or TXT files ready to hard-sub onto your video.
Who uses it: video translators, YouTube creators and localizers, language learners, subtitle groups and teams that need to localize video content quickly.