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Fix unsupported video

If a video won’t play or an app says the format isn’t supported, make it an MP4 that plays almost everywhere. It’s free, and the video never leaves your device.

Files stay on your device

Drop files to convert

See their format, then choose an output.

MP4, MOV, MKV, WebM, MPEG-TS, and 3GP videos. You can also drag in a whole folder.

How to fix an unsupported video format

Convert the file to an MP4 with H.264 video and AAC audio, a widely supported combination for browsers and media players. The conversion runs locally, and you can inspect the output before downloading it.

  1. Step 1

    Choose the file
    Pick the video that will not play or upload.

  2. Step 2

    Create a compatible copy
    Keep the H.264 and AAC MP4 preset.

  3. Step 3

    Download the MP4
    Check the result and save the fixed video.

What to expect

Supported inputs
MP4, MOV, MKV, WebM, MPEG-TS (.ts, .mts), and 3GP videos. AVI, WMV, and FLV files can’t be opened yet.
What happens
The fix exports an MP4 with H.264 video and AAC audio until a different output is chosen.
Limits
The page exports a widely supported MP4 when this browser can encode it. Not every file will play everywhere.

Your files stay on your device

Your computer does the work, so the file never has to be uploaded, and that’s also why it’s free: there’s no server time for us to pay for. You don’t need an account, and nothing you make gets a watermark.

“Thanks a lot for such a simple yet powerful tool!”
Mauricio, a supporter

Questions

An MP4 with H.264 video and AAC audio, until you choose a different output.

No. The page exports a widely supported MP4 when this browser can encode it.

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