MP4 WMV

MP4 to WMV Converter

Convert MP4 to WMV in your browser. Free, private, and fast. Tune codec, quality, and compatibility without sending files to a server.

This converter runs a full FFmpeg engine in your browser. The first conversion downloads the engine (~31 MB, cached afterwards) — your file itself still never leaves your device.

Drag & drop your MP4 file here

or

Max file size: 50 MB · Your file stays in your browser

Your file is processed locally in your browser — nothing is ever uploaded.

Why Convert MP4 to WMV?

Converting MP4 to WMV is a common task whenever a file has to work somewhere that expects the other format. MP4 is the world's most widely supported video container format. WMV is the Windows Media Video format that Microsoft introduced in 1999 for streaming and playback on Windows. This converter makes the switch locally in your browser — nothing is uploaded.

Common use cases

  • You have a MP4 file and need it in WMV format.
  • The target software or platform requires WMV but your file is in MP4.
  • Typical use of WMV: Opening old Windows recordings on a phone, tablet or Mac.
  • You want to reduce file size or improve compatibility without using desktop software.
Keep in mind: Browsers and phones cannot play WMV natively and the format is considered obsolete. Files created here use the classic WMV2 codec for maximum Windows compatibility.

How to Convert MP4 to WMV

  1. Upload or drop your MP4 file into the converter above.
  2. Adjust any output settings for WMV if needed.
  3. Click Convert and download your converted file instantly.

About the Formats

MP4 (MPEG-4 Part 14)

MP4 is the world's most widely supported video container format. It efficiently stores video (H.264 or H.265), audio, and subtitles in a single file with excellent compression.

Compatibility: Universal — supported by every browser, device, operating system, and video platform.

WMV (Windows Media Video)

WMV is the Windows Media Video format that Microsoft introduced in 1999 for streaming and playback on Windows. It stores video in an ASF container and still turns up in old camera footage, screen recordings and corporate archives.

Compatibility: Windows Media Player, VLC and most desktop players. Not playable in browsers, on iPhone or in most Android galleries.

100% Private & Browser-Based

Your files never leave your device. All conversion happens locally in your browser — nothing is uploaded to any server. No sign-up required.

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Need the reverse?

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FAQ

Frequently Asked Questions

Yes — completely free with no sign-up, no watermarks, and no size limits for typical files.

Quality depends on the output settings. For lossless output, choose the highest quality setting available.

Your file is processed entirely within your browser using local JavaScript. It is never uploaded to any server. Only you can access your file.

For browser-based conversion, files up to 50 MB work best. Very large files may take longer depending on your device. We recommend splitting very large files before converting.

Currently, AintoB converts one file at a time to keep the browser-based process simple and private. Reload the page to convert another file.