Subtitle Studio
Transcribe a video into word-timed subtitles with an on-device Whisper model, style the captions, and burn them into your video. Runs on your device — nothing is uploaded, nothing is stored.
Drop a video here, or click to choose
Supports MP4, WebM, MOV, and MKV. One file at a time.
Runs OpenAI Whisper entirely in your browser via WebGPU (with a WASM fallback). The model downloads once from a CDN on first use, then transcribes on-device — your video is never uploaded.
Subtitle Studio auto-captions your videos for reels, shorts, and social clips — helping them reach more viewers and stay watchable with the sound off, and more accessible to viewers who are deaf or hard of hearing. Captions are burned directly onto the picture with no watermark.
Transcription runs entirely on-device using an in-browser Whisper model, so your video is never uploaded to a server, and it works in any language Whisper supports — not just English.
Once the transcript comes back, you can edit the wording and timing of individual cues, then pick a caption style — including TikTok-style animated captions like word-highlight or karaoke — before exporting.
- Drop a video into the tool.
- Let it auto-transcribe on-device.
- Edit the cue text and timing as needed.
- Pick a caption style or animation, such as TikTok-style word-highlight or karaoke.
- Export SRT/VTT subtitles, or a burned-in MP4.