All tools/Replace or add audio track
Replace or add audio track
Keep the picture, replace the voice or music with a local audio file.
Runs in your browser
No signup
Max 200 MB
How to use
- Add videoChoose the picture track you want to keep.
- Add audioChoose the new soundtrack.
- ExportWe copy the video stream and mux the new audio.
FAQ
Is video re-encoded?
No — video is stream-copied when possible, which is fast.
What if lengths differ?
Output stops at the shorter of video/audio (`-shortest`).
Private?
Yes, both files stay in the browser.
Need full video localization?
Recast will translate speech, adapt the presenter, and ship market-ready cuts. Launching soon.
Recast · One video. Every market.