Can I convert MP4 to MKV?
No. MKV and TS are input formats only. VidFold exports video as MP4, MOV or WebM, including from MKV files.
Good to know
Will converting reduce quality?
For MP4 or MOV output, H.264 video with AAC audio can be copied without re-encoding. Other codecs are re-encoded to H.264 and AAC. WebM uses codecs supported by that container and your browser, so switching to it may also require re-encoding.
Are subtitles and extra audio tracks kept?
No. VidFold keeps the main video track and the main audio track only.
Why H.264 and AAC?
It’s the MP4 combination that almost every phone, computer, TV, browser and editing app can play.
Is my video uploaded?
No. VidFold processes the file with your browser’s own video APIs, on your device. Nothing is sent to a server, and location and device details are removed from the export by default.
Tools
- FIT A LIMITCompress videoShrink to 16 MB for WhatsApp, 20 MB for Discord or your own size, keeping the most quality that fits.
- TRIMTrim videoCut the start and end, usually without re-encoding.
- AUDIOVideo to MP3Save the sound as MP3, M4A, WAV or Opus.
- CONVERTMOV ↔ MP4Drop your video; the conversion direction is automatic.
- CONVERTWebM ↔ MP4Drop your video; the conversion direction is automatic.
- CONVERTMKV to MP4MKV files for phones, TVs and editors.
- ALL IN ONEFull editorEvery option: size, format, rotate, crop, frame rate.
INSTALL · FREE · OFFLINE
Use VidFold as an app.
Install it from your browser: it opens in its own window, starts instantly and keeps working without an internet connection. No app store, no account, nothing extra to download.
- Chrome, Edge or Android: use the button, or the install icon in the address bar or browser menu.
- iPhone or iPad (Safari): tap Share, then Add to Home Screen.