Convert MP4 to MKV
Turn MP4 videos into MKV right here, 100% in your browser. Your file never leaves your device, there's nothing to install, and there's no sign-up — drop a MP4 file below and download the MKV in seconds.
How to convert MP4 to MKV
- Drop your MP4 file into the box above, or click to choose one.
- Toolery converts it to MKV instantly, right on your device.
- Download your new MKV file — that's it.
FAQ
Is it safe to convert MP4 to MKV on Toolery?
Yes. The conversion runs entirely in your browser, so your video is never uploaded to a server. Nothing is stored, seen, or shared — it's as private as editing the file on your own computer.
Do I need an account to convert MP4 to MKV?
No. The MP4-to-MKV converter is completely free and needs no sign-up. Just drop your file and download the result.
Can I convert more than one file at a time?
Single files are free with no limit here. To convert many videos at once in one batch, a free Toolery account unlocks batch mode.
Will converting MP4 to MKV reduce quality?
Toolery keeps as much quality as MKV allows while keeping the file efficiently sized.