MKV to WEBM

Convert MKV files to WEBM for free. No size limit, no sign-up, nothing uploaded.

How to convert MKV to WEBM

  1. Choose your MKV files or drop them on this page. You can add as many as you like.
  2. WEBM is already selected. Press Convert, or Convert all for several files.
  3. Press Download. With several files you can download them all as one ZIP.

MKV is a video container often used for films with several audio tracks. WEBM is an open video format made for websites.

Questions

Is converting MKV to WEBM free?
Yes. ConvertBoy is free with no daily limit, no watermark and no sign-up.
Is there a file size limit?
No. Your own device does the work, so the only limit is your device's memory. Very large videos take longer on slower computers.
Are my files uploaded anywhere?
No. The conversion happens inside your browser. Your MKV files never leave your device, and nothing is kept after you close the tab.
Does it work on a phone?
Yes. It works in Safari on iPhone and Chrome on Android, as well as on any computer.
How long does it take?
A song takes a few seconds. A video takes roughly as long as it plays on an average laptop, less on a fast one. The first time, the converter loads its video engine (about 30 MB).

Convert MKV to another format

Convert other files to WEBM