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Convert to MP4

Turn a MOV, WebM, MKV, or AVI video into a web-friendly MP4 without leaving your browser.

Video
Drop a video here or click to browse
or paste from clipboard (Ctrl+V) · MP4, MOV, WebM, MKV
Files stay in your browser. Nothing is uploaded.
Quality

How to convert a video to MP4 online

  1. Add your video

    Drop a MOV, WebM, MKV, AVI, or M4V file onto the tool or click to browse.

  2. Pick a quality

    High keeps the most detail, Balanced is the recommended middle ground for the web, Small produces the lightest file.

  3. Convert

    Click Convert to MP4. The conversion runs entirely inside your browser; the first run downloads the conversion engine once, then it stays ready for the session.

  4. Download the MP4

    The result is an H.264 MP4 with AAC audio, packaged so it can start playing before it finishes downloading, ready for any player, editor, or platform.

Why use this tool

Every common format in

MOV, WebM, MKV, AVI, M4V, and most other video files convert to one standard MP4.

Plays everywhere

H.264 video with AAC audio is the most universally supported combination: phones, browsers, TVs, editors, and social platforms all take it.

Streams instantly

The MP4 is packaged so playback can begin before the download finishes, which is what the web wants.

Nothing leaves your browser

Conversion runs entirely inside your browser. Your footage is never uploaded to a server.

Quality you control

Three quality presets trade detail against file size, with Balanced as a sensible default.

Free, no watermark, no signup

No account, no branding on the output, no daily conversion quota.

About this tool

This converter turns almost any video file into a web-friendly MP4 entirely inside your browser. The output is always H.264 video with AAC audio, the one combination that plays on effectively every device and platform, and the file is packaged so it can start playing while it is still loading.

Typical jobs: an iPhone MOV that a Windows colleague cannot open, a WebM screen recording that an editor refuses to import, or an MKV download that a TV will not play. Short clips convert in seconds; long, high-resolution videos take minutes and are more comfortable on a desktop browser, since the whole conversion runs on your device memory. The first run downloads the conversion engine once, after which it stays ready for the session.

Because nothing is uploaded, footage that should stay private stays private. If the target is a smaller file rather than a different container, the video compressor squeezes size at your chosen quality; to cut a section first, use the video trimmer, and to turn a clip into a shareable animation there is video to GIF.

Frequently asked questions

How do I convert a video to MP4?
Drop a video onto the tool or click to browse, optionally pick a quality, then click Convert to MP4. The tool re-encodes it to an H.264 MP4 with AAC audio and shows you the source format alongside the new MP4. Click Download to save the converted file.
Is my video uploaded to a server?
No. The entire conversion runs locally in your browser. Your video never leaves your device, is never uploaded, and is not stored or logged anywhere. The first time you convert, the tool downloads the conversion engine once, after that it stays ready for the rest of your session.
Which video formats can I convert?
You can drop in MOV, WebM, MKV, AVI, M4V, and most other common video files. The output is always an MP4 with H.264 video and AAC audio, which plays on virtually every device, browser, editor, and social platform.
Why MP4 with H.264, and why does it start playing so quickly?
MP4 with H.264 video and AAC audio is the most universally compatible video format, so it plays almost everywhere without a special codec. The tool also packages the file so the video can begin playing while it is still downloading, ideal for the web.
What does the quality setting change?
Quality sets the H.264 detail level. High keeps the most detail for the largest file, Balanced is the recommended middle ground for the web, and Small squeezes the file down the most at some loss of detail. More detail means a larger file. Balanced is the default and works well for most videos.
Is there a limit on video size or length?
There is no fixed limit, but because everything runs in your browser using your device memory, very large or very long videos take longer and use more RAM. Short clips convert in a few seconds, while long, high-resolution videos can take a minute or more. For very large files, a desktop browser handles them more comfortably than a phone.

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