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Convert to MP4

Re-encode to an H.264 + AAC MP4 that plays everywhere.

Convert to MP4

MOV, WebM, MKV → playable MP4

  1. Choose
  2. Process
  3. Download

Drop a file here, or click to choose

Up to 100MB · nothing is uploaded until you press Run

Up to 100MB

About this tool

This converts video into an MP4 that plays essentially everywhere. MP4 with H.264 video and AAC audio is the closest thing to a universal format — phones, browsers, TVs, editors and social platforms all accept it — which makes it the answer when a file simply will not open or upload.

How to convert a video to MP4

  1. 1.Choose the video file you want converted.
  2. 2.Press Run and wait for the job to finish.
  3. 3.Download the MP4.

When people use it

A file that will not play

MKV and WebM are common downloads and awkward guests on phones, TVs and older software. MP4 usually just works.

Uploading somewhere fussy

Plenty of upload forms accept MP4 and little else. Converting first avoids a rejected upload.

Editing software compatibility

Some editors refuse unusual codecs or handle them badly. A clean H.264 MP4 imports predictably.

What it will not do

Worth knowing before you upload, rather than after.

  • This re-encodes rather than repackaging, so there is a small quality cost and it is not instant.
  • Output is standardised to H.264 and AAC for compatibility, not chosen for the smallest file.
  • Digitally protected files cannot be converted.

Questions

Which formats can I convert to MP4?

MOV, WebM, MKV and AVI, among others. The output is always H.264 video with AAC audio in an MP4 container.

Will converting reduce quality?

Slightly, because the video is re-encoded. For most viewing purposes the difference is not noticeable, but it is not a lossless repackage.

Is it free?

Yes — free, no account, no watermark, for files up to 100MB.

Why is MP4 recommended?

Because H.264 MP4 has the broadest hardware and software support of any common video format. If something plays video at all, it very likely plays this.

What happens to my file?

Your upload goes to private storage that is never public and never listed, and only the anonymous session that created the job can read it. The original file is deleted as soon as processing succeeds. The result stays available for about 90 minutes, and you can delete everything immediately with the Delete now button.

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Other tools

Want bigger files, several at once, or no queue? See Pro.