WebM to MP4
h.264 with AAC audio, which plays on effectively everything.
Your file
Drop a file here, or click to choose
It stays on this device. Nothing is sent anywhere.
Settings
Why convert away from WebM
WebM is a web format. Plenty of things that are not browsers refuse it: TVs, older phones, most video editors, PowerPoint, and a fair few social platforms. MP4 with h.264 is the closest thing to a universal video file.
Both WebM codecs are handled, VP8 and VP9, so it does not matter which one your file uses. This direction is also the fast one, since x264 encodes considerably quicker than libvpx in a browser.
Common questions
Will the quality drop?
A little, since it is a re-encode. At the default quality of 23 the difference is not visible in normal viewing. Lower the number to 20 if you want to be careful.
My screen recording came out as WebM. Is that normal?
Yes, browser-based recorders almost always produce WebM. Converting to MP4 is the usual next step before editing or uploading.