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Quality

Balanced is CRF 23. Higher keeps more detail. Smaller uses CRF 32.

MOV, MKV, WebM, AVI, MPEG, M4V, 3GP, MTS, or VOB. The first run downloads FFmpeg once in this browser.

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Convert a video file to MP4

Convert a video file to MP4 in your browser. No signup, H.264 and AAC, and the file stays on your device.

What is a video to MP4 converter?

A video to MP4 converter takes a video clip and saves it as an MP4 file. People use a clip converter when they have a MOV, MKV, WebM, or AVI and need MP4 for a player, a form, or an editor. This page does that in the browser: you upload the video, pick higher, balanced, or smaller quality, and download an .mp4 file with H.264 video and AAC audio.

Video to MP4 converter features

Save a video clip as an MP4 file.

  • Video to MP4

    Upload MOV, MKV, WebM, AVI, MPEG, M4V, 3GP, MTS, or VOB and download an .mp4 file.

  • Quality you choose

    Pick higher, balanced, or smaller before the clip is encoded.

  • H.264 and AAC

    The MP4 uses H.264 video and AAC audio so common players can open it.

  • Browser-side conversion

    The video stays on your device. No account is required to convert a clip to MP4.

How to convert a video to MP4

Three steps from a video clip to an MP4 file.

  1. Add the video

    Drop a MOV, MKV, WebM, AVI, or another supported clip.

  2. Pick the quality

    Keep balanced, or choose higher detail or a smaller file.

  3. Download the MP4

    Click Convert to MP4, then save the .mp4 file.

Tips for video to MP4

Get a cleaner MP4 from a video clip.
  • 01

    Start at balanced

    CRF 23 is a practical default. Use higher when the picture needs more detail.

  • 02

    Match the extension

    Use MOV, MKV, WebM, AVI, MPEG, M4V, 3GP, MTS, or VOB so the encoder can read the file.

  • 03

    Keep the file under 200 MB

    Larger clips are rejected so the conversion can finish in the browser.

  • 04

    Expect a new encode

    The MP4 is H.264 and AAC. It is a new encode of the clip, so the file size will change.

Great for

Reasons to save a video clip as MP4.

  • A player that wants MP4

    Turn a MOV, MKV, WebM, or AVI clip into the MP4 file most players open.

  • A smaller clip

    Pick the smaller setting when you need a lighter MP4.

  • A clip with or without sound

    Picture is kept either way. Audio is included when the file has a soundtrack.

  • A private conversion

    Build the MP4 on your device when you do not want to upload the clip.

Why use this converter

A focused video to MP4 path in the browser.

  • Free to use

    Convert a video clip to MP4 with no signup and no watermark on the download.

  • Private by default

    Reading the video and writing the MP4 stay in the browser.

  • No install

    Open the page, add the file, and download. A desktop converter does not have to be installed.

  • Several video types

    One page covers MOV, MKV, WebM, AVI, MPEG, M4V, 3GP, MTS, and VOB.

Technical details

How this video to MP4 conversion works.
Input
MOV, MKV, WebM, AVI, MPEG, MPG, M4V, 3GP, MTS, M2TS, or VOB, up to 200 MB.
Output
An MP4 file with H.264 video (CRF 18, 23, or 32) and AAC audio at 128 kbps when the clip has sound.
What is left out
Extra subtitle and attachment tracks are not copied. A web address is not fetched.
Where it runs
FFmpeg encodes the MP4 locally in the browser. The file is not uploaded for conversion.

Sources & References

References for the MP4 file this converter writes and the H.264 video inside it.
  • “MP4 (formally MPEG-4 Part 14) is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images.”
    — Wikipedia — MPEG-4 Part 14

    MP4: The download is that MP4 container, with the clip re-encoded inside it. en.wikipedia.org/wiki/MPEG-4_Part_14

  • “Advanced Video Coding (AVC), also referred to as H.264 or MPEG-4 Part 10, is a video compression standard based on block-oriented, motion-compensated coding.”
    — Wikipedia — Advanced Video Coding

    H.264: The picture in the MP4 is encoded with that H.264 video standard. en.wikipedia.org/wiki/Advanced_Video_Coding

Frequently Asked Questions

Quick answers about this tool—open a question to read more.