Drop your video here or click to browse
MP4, WebM and MOV · your file never leaves this device
Re-encode to a format that plays anywhere, at the resolution you pick. Everything is processed on your device.
Format problems usually show up at the worst moment: an upload form rejects the file, a player shows audio with a black screen, or a phone refuses to open a clip someone sent. Re-encoding to a common format fixes almost all of it.
This converter re-encodes using the encoders built into your browser, so what it can produce depends on the browser you're using. Chrome, Edge and Firefox produce WebM; Safari produces MP4. Both are widely supported — WebM plays in every modern browser and on Android, and uploads without complaint to YouTube, Slack and most social platforms.
It cannot produce AVI, MKV or MOV. No browser tool can, without downloading a large conversion engine first. It also cannot open a file your browser can't decode: if the preview stays black, that file needs converting elsewhere before anything here will work on it.
If you're posting to the web, WebM is smaller at the same quality. If you're sending the file to someone else's phone or an older program, MP4 is the safer bet where your browser can make one.
Chrome's built-in recorder writes WebM. Safari on Mac or iPhone will produce an MP4 from the same tool, and any free WebM-to-MP4 converter will finish the job.
Often yes, especially at a lower resolution — but that's the compressor's actual job, and it gives you a target size to aim at.