Video Converter
Convert videos between MP4, MOV, MKV and WebM in your browser, without uploading your files.
Processed on your device: your file never leaves your computer
Up to 50 files, 200 MB max each.
What Video Converter does
Change the format of your videos between MP4 (the one every phone, TV and social network plays), MOV (iPhone and Mac), MKV and WebM (the web's format). If the video already uses a codec the chosen format accepts, it is copied without re-encoding: it takes seconds and loses no quality. Otherwise it is re-encoded at high quality with your browser's codec. The sound goes along with the picture. Everything happens on your device: videos aren't uploaded to any server.
Limits
- Up to 50 files at a time, up to 200 MB each.
- With Pro: files up to 500 MB and up to 500 per batch.
- A job that takes longer than 30 minutes is stopped so it doesn't freeze your device.
- Processed in your browser: your files are never uploaded to a server.
Frequently asked questions
Does converting lose quality?
If only the container changes (for example, an H.264 MP4 to MOV or MKV), no: it is copied as is. If it must be re-encoded (for example, to WebM), a high quality is used that in practice can't be told apart from the original. Each result says whether it was copied or re-encoded.
Which format should I pick?
MP4 if it must play anywhere; MOV to edit in iMovie or Final Cut; WebM for a web page; MKV to keep everything as it is.
Why did my MP4 come out in VP9 or AV1?
Some browsers (such as Chromium or Firefox on Linux) have no H.264 encoder. Then the MP4 is made with VP9 or AV1, which play in Chrome, Edge, Firefox and Android but maybe not on iPhone. For H.264 use Chrome, Edge or Safari; you'll see a notice when it's missing.
Is there a limit?
Up to 200 MB per file on the free plan (500 MB with Pro) and 2 hours long, because the video is built in your browser's memory. The main video and audio tracks are kept; embedded subtitles aren't copied. AVI, WMV and FLV can't be read yet.