MP4 to WMV Converter

Convert an MP4 into a Windows-ready WMV. Free, in your browser, with no signup, no file limits, and no watermark.

Select MP4 file →

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We support most file types including: MP4, MOV, WEBM, AVI, MP3, WAV, PNG, JPEG, GIF, MKV, PDF, FLAC, TIFF!

EchoWave is used by creators, marketers, educators, and businesses to convert and edit media online.

Updated July 2026

Convert an MP4 to WMV in your browser, free and with no signup. WMV is Microsoft's video format, so it slots straight into older Windows tools that do not take MP4 cleanly, like legacy Windows Movie Maker projects and older PowerPoint decks. The converter re-encodes your video to Windows Media Video so it drops into those Windows-first workflows without a fuss.

Free, no sign-upNo account, no trial

Runs in your browserNothing to install

Works on every devicePhone, tablet, laptop

No watermarkClean output, every time

How it works

How to convert MP4 to WMV

1
Upload your MP4
Drag your MP4 onto the converter or pick it from your device. Nothing to install.
2
Choose WMV and convert
Select WMV as the output and start. Free, with no sign-up and no watermark.
3
Download your WMV
Save the finished WMV, or open it in the editor to trim, crop, or resize it first.

Try it

Estimate your WMV

Pick a video bitrate and a length to see the WMV file size before you convert.

Video bitrate

Length5 min

1 min30 min

Estimated WMV size183MBSharp 1080p

An estimate. Real size varies with resolution, frame rate, and how much the picture moves.

The formats

MP4 vs WMV

MP4

MPEG-4 Part 14

The video format that plays everywhere

Type: Video container
Holds: H.264 video plus AAC audio, sometimes subtitles
Typical size: Large, it carries video
Plays on: Phones, browsers, TVs, almost any player

Best for:Watching and sharing video

WMV

Windows Media Video

Windows Media video, small and Windows-first

Type: Windows Media video
Holds: Windows Media video with WMA audio
Typical size: Small, built for Windows
Plays on: Windows Media Player and VLC

Best for:Older Windows video and slideshows

Will it lose quality?

When the codecs already match WMV, the converter can change the container without re-encoding, so the picture stays identical.
When the video has to be re-encoded for WMV, a high bitrate keeps it visually close to the MP4.
Converting cannot add detail the MP4 never had. The output is at best as good as the source.

Use cases

What people use it for

Play anywhereMake a clip your device supports

Video editorsGet footage your software accepts

Web videoUse a format browsers play

CourseworkHand in a standard video file

SharingSend a clip people can open

Troubleshooting

If something looks off

The WMV will not play

Some players are picky about codecs. Try it in VLC, which opens almost anything, or convert again and let the converter re-encode the video.

The file got larger

A format change can shift the size, and re-encoding at a high bitrate adds overhead. Lower the bitrate or trim the clip for a smaller file.

Audio and video drift out of sync

Re-download the source and convert again. If a long recording drifts, splitting it into shorter pieces usually fixes the sync.

FAQ

MP4 to WMV questions

Is the MP4 to WMV converter free?

Yes. EchoWave converts MP4 to WMV with no signup, no file-count limit, no trial, and no watermark. Upload your video, convert it, and download the WMV from your browser.

How do I convert MP4 to WMV?

Upload your MP4, choose WMV as the output format, and start the conversion. When it finishes, download the WMV or open it in the editor to trim, crop, or resize it first.

Why convert MP4 to WMV?

WMV is the format older Windows software expects. Legacy Windows Movie Maker did not import MP4, and older PowerPoint versions embed WMV more reliably than MP4, so converting fixes those compatibility gaps. For modern players, phones, and the web, MP4 is still the better default.

Will converting MP4 to WMV reduce the quality?

WMV uses a different codec than MP4, so the video is re-encoded rather than copied, which means it is not pixel-for-pixel identical. At a high bitrate the difference is hard to see, and the WMV can never be sharper than the MP4 you started from.

Does WMV work in PowerPoint?

Yes, and that is one of the main reasons to convert. Older PowerPoint versions, especially 2010 and 2013, embed and play WMV more consistently than MP4. Insert the WMV through Insert then Video, and embed it rather than linking so it travels with the file.

Will the WMV play on Mac?

Not with the built-in player. WMV is a Microsoft format, so on a Mac you usually need VLC to play it. If the video has to work across Mac and Windows, MP4 is the more portable choice and WMV is best kept for Windows-only use.

Is WMV smaller than MP4?

It can be, since WMV was built to compress well for Windows playback, but the result depends on the bitrate you choose and the footage itself. Modern H.264 MP4 is also very efficient, so do not expect a dramatic size change from the format alone.

Does the MP4 to WMV converter work on Mac, Windows, and Chromebook?

Yes. The converter runs in any browser, so you can create a WMV from an MP4 on macOS, Windows, Chromebook, Linux, and Android with nothing to install and no account to create.

Can I convert large MP4 videos to WMV?

Yes. There are no file-count limits on these pages, and large videos are supported. They simply take a little longer to upload and convert.