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Quality

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

Windows Media Video (.wmv). The first run downloads FFmpeg once in this browser.

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Convert a WMV video to MP4

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

What is WMV to MP4 conversion?

Windows Media Video is Microsoft’s .wmv format. This page re-encodes that video as MP4.

WMV to MP4 converter features

Save a Windows Media Video file as an MP4.

  • WMV to MP4

    Upload a .wmv file and download an .mp4 file.

  • H.264 and AAC

    The video is H.264 and the sound, when the file has any, is AAC.

  • Quality you choose

    Pick Higher, Balanced, or Smaller before converting.

  • Browser-side conversion

    The WMV stays on your device. No account is required to convert WMV to MP4.

How to convert WMV to MP4

Three steps from a WMV file to an MP4.

  1. Add the WMV file

    Drop a .wmv file from your device. The converter reads it in your browser.

  2. Pick a quality

    Choose Balanced to start, or Higher or Smaller, then click Convert to MP4.

  3. Download the MP4

    Save the .mp4 file and play it in a normal video player.

Tips for converting WMV to MP4

What this converter keeps from a WMV file.
  • 01

    The picture and sound are re-encoded

    WMV is decoded, then written as H.264 video and AAC audio.

  • 02

    Protected files stay protected

    A copy-protected Windows Media file cannot be converted here.

  • 03

    Subtitles are left out

    The MP4 keeps the video and its audio track. Subtitle streams are not copied.

Good uses for a WMV to MP4 converter

When a player or app expects MP4 instead of WMV.

  1. Play an old WMV: Turn a Windows Media Video into an MP4 a phone or editor can open.

  2. Share a common file: MP4 with H.264 plays in more apps than WMV.

  3. Pick the size: Higher keeps more detail. Smaller uses CRF 32.

Why convert WMV to MP4 here

A local WMV to MP4 conversion with a quality you pick.

  • No signup

    Convert a WMV file without an account.

  • Stays on your device

    Encoding runs in the browser.

  • A normal MP4

    The download is an H.264 MP4 with AAC audio when the WMV has sound.

Technical details

How this WMV to MP4 conversion works.
Input
A Windows Media Video file (.wmv) up to 200 MB.
Output
An MP4 file with H.264 video at CRF 18, 23, or 32, and AAC audio at 128 kbps when the WMV has sound.
What is left out
Subtitle streams are not copied. Copy-protected Windows Media files are rejected.
Where it runs
FFmpeg encodes the MP4 locally in the browser. The file is not uploaded for conversion.

Sources & References

References for the WMV file this converter reads and the MP4 it writes.
  • “Windows Media Video (WMV) is a series of video codecs and their corresponding video coding formats developed by Microsoft.”
    — Wikipedia — Windows Media Video

    Windows Media Video: This tool reads that video, the .wmv file. en.wikipedia.org/wiki/Windows_Media_Video

  • “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 H.264 video and AAC audio. en.wikipedia.org/wiki/MPEG-4_Part_14

Frequently Asked Questions

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