video converter
change a video to mp4, webm, mov or mkv. nothing is uploaded; conversion runs locally with ffmpeg.
runs on your device · free · no sign-up
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frequently asked questions
which formats can i convert?
inputs include mp4, mov, webm, mkv, avi, flv and wmv. outputs are mp4 (h.264), webm (vp8), mov and mkv.
will quality drop?
converting re-encodes the video at a high quality setting, so any loss is small. for lossless trimming or muting use those tools, which copy the stream.
is there a file size limit?
no hard limit, but the browser needs memory for the file and the result. files under about 500 mb work best.