Extract Subtitles from Video
Check for existing embedded text subtitles first. If there is no usable track, generate new subtitles from the audio.
Text tracks in standard, non-fragmented MP4/MOV are supported. Image subtitles, burned-in captions, MKV, fragmented files and edit lists are not supported.
How it works
- Select an MP4 or MOV file.
- Inspect available subtitle tracks, language and codec.
- Download supported tracks, or generate subtitles from audio.
Key features
- Local video subtitle extractor.
- Language, codec and track name inspection.
- SRT and VTT export for supported text tracks.
Supported formats
Standard non-fragmented MP4 / MOV text tracks: tx3g and wvtt (WebVTT). MKV, image subtitles, edit lists and burned-in captions are not supported.
Private by design
Your files stay on your device. Media is processed locally and is not uploaded to our server. Whisper runs in your browser; model downloads come from model hosting or a CDN.
Frequently asked questions
Can it extract subtitles from every video?
No. This MVP reads supported text tracks in standard MP4 and MOV containers. Unsupported formats are clearly reported.
Can it extract burned-in captions?
No. Burned-in subtitles are video pixels, not an embedded subtitle track. Audio transcription can create new captions.
What if there is no subtitle track?
Choose Generate subtitles from audio to run local Whisper transcription on the same file.