Convert a video
Upload almost any video (MP4, MOV, MKV, AVI, WEBM, FLV, WMV, TS…) and pick the output format.
Your files never leave your device
How to convert a video
- 1
Upload the video
Almost any input format is accepted.
- 2
Pick the output
MP4, WEBM, MKV or MOV.
- 3
Download
With a preview of the result.
Why use this tool
Universal input
MP4, MOV, MKV, AVI, WEBM, M4V, MPEG, 3GP, TS, FLV and WMV.
Useful outputs
Compatible MP4, efficient WEBM, flexible MKV and Apple-friendly MOV.
Dedicated pages too
Every specific conversion also has its own page with its optimal recipe.
Private
The video never leaves your device: ffmpeg runs in your browser.
Frequently asked questions
Which output should I pick?
MP4 for total compatibility; WEBM for websites; MKV for a flexible container; MOV for the Apple ecosystem.
Does it always re-encode?
The universal converter does, to guarantee the result. The MP4-to-MOV/MKV pages use instant stream copy when codecs allow it.
Why does it take a while?
Re-encoding runs in your browser on a single thread. It's the price of your video never being uploaded.
Is there a size limit?
250 MB per file, with a warning from 100 MB: everything lives in browser memory.