Convert WMV to MP4
WMV was the standard on Windows for years, but Macs, iPhones and many apps no longer open it. Convert Windows Media Video to MP4 without uploading anything.
- No upload
- No watermark
- No file size limit
- Hardware accelerated
Drop videos here to convert them
MP4, MOV, WebM, MKV, AVI and more · no size limit or watermark
Processed on your device. Your videos are never uploaded.
Advanced: codec, frame rate, audio, trim
How to convert WMV to MP4
- 1
Drop in your WMV files
Add .wmv videos from old Windows Movie Maker projects, webcams, screen recordings or downloads.
- 2
Keep the MP4 preset
Video is encoded to H.264 and Windows Media Audio to AAC, so the file plays on any device.
- 3
Let the compatibility engine work
The first conversion downloads a one-time engine of about 30 MB; afterwards it starts immediately.
- 4
Download the MP4
Preview the result and download it, or grab every converted file as a ZIP.
What is WMV and why convert it?
Windows Media Video uses Microsoft’s own codecs (WMV7, WMV8, WMV9 and VC-1) inside the ASF container, usually with Windows Media Audio. Windows Media Player and older versions of Windows handled it natively, but macOS, iOS, Android, smart TVs and browsers generally don’t, and video editors increasingly drop support.
Because WMV’s codecs aren’t allowed inside MP4, the video has to be re-encoded. H.264 at the High preset preserves the original look while making the file playable everywhere – and it is often smaller than the WMV.
Private conversion without software
You don’t need to install a converter. Asset Compressor uses FFmpeg compiled to WebAssembly, running inside your browser tab. The WMV is read straight from your disk and the MP4 is created on your device, so personal recordings stay private.
Software decoding is slower than the hardware path used for MP4 and MOV, so expect a long video to take a few minutes. A desktop or laptop is considerably faster than a phone for this.
Old Movie Maker projects
Windows Movie Maker exported finished films as WMV by default, so many family archives from the 2000s are WMV files. Converting them to MP4 lets you watch them on a phone, share them in a messaging app or upload them to a cloud photo library.
Frequently asked questions
Can I play WMV on a Mac?
Not with built-in apps. Converting to MP4 is the simplest fix – the result opens in QuickTime, Photos and iMovie.
Does the conversion keep the original resolution?
Yes. The resolution and frame rate stay the same unless you change them in the settings.
Is WMV to MP4 conversion lossless?
It can’t be, because WMV codecs must be re-encoded for MP4. The High quality preset keeps the difference practically invisible.
Are DRM-protected WMV files supported?
No. Copy-protected files can’t be converted. Only use videos you own or have permission to convert.
Related tools
AVI to MP4
AVI files from old cameras, DivX and Xvid downloads or Windows-era recordings often won’t play on phones or in browsers. Convert them to MP4 right on your device.
MPG to MP4
MPG files from camcorders, TV recorders and old video CDs are big and awkward to play. Convert them to MP4 – usually much smaller at the same quality.
Video converter
Change a video’s format in seconds. When the codecs allow it, the streams are copied without re-encoding, so the quality stays exactly the same.
Compress video
Shrink MP4, MOV, WebM and MKV files on your own device with hardware-accelerated encoding. Choose a quality level or an exact target size – no upload, no watermark.
Related guide
Last updated