AI Tools
Subtitle Generator
Upload a video or audio file and get real subtitles — auto speech recognition runs on your device with Whisper AI. Pick the spoken language (or auto-detect), choose the subtitle language, translate if you like, and export SRT, VTT, ASS, SBV & TXT.
Drop a Video or Audio File!
or
MP4, WebM, MOV, MKV, MP3, WAV, M4A, OGG, FLAC — never uploaded
- Whisper AI — auto speech recognition on-device
- 40+ spoken languages, auto-detect or pick
- Translate subtitles — to English or 15+ languages
- SRT · VTT · ASS · SBV · TXT export
- 100% private — AI runs in your browser
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AUTO CAPTIONS
Why Choose UCDreams Subtitle Generator?
AI-powered speech recognition to auto-generate SRT subtitles
Lightning Fast
Powered by modern browser WebAssembly & HTML5. Instant processing with zero queue times.
100% Private & Secure
Your files never leave your device. All calculations run locally in your browser memory.
Free & Unlimited
No registration, no daily limits, no hidden fees, and zero forced watermarks on exports.
Works Everywhere
Fully responsive on desktop, laptop, iPhone, Android, and tablets on all modern browsers.
3 EASY STEPS
How to Generate Subtitles
Select or Drop File
Upload your video or audio file.
Process Online
AI automatically transcribes spoken audio into synchronized subtitles.
Download Result
Review, edit captions, and download your .SRT subtitle file.
FAQ