Convert MP4 to WMV online in seconds — free, with no sign-up. WMV is lossy and ideal for legacy Windows video; converted to MP4 for sharing. Your files are encrypted and deleted automatically after 24 hours.
MP4
MPEG-4 (H.264) — The universal video container — plays on virtually every device, browser and platform.
WMV
Windows Media Video — A Microsoft format with limited support outside Windows.
How to convert MP4 to WMV
- 1Upload your MP4 file
Click “Choose a file” or drag and drop your MP4 file onto the page — no sign-up or email needed.
- 2Convert to WMV
WMV is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your WMV file
Your WMV file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
MP4 vs WMV
| MP4 | WMV | |
|---|---|---|
| Full name | MPEG-4 (H.264) | Windows Media Video |
| Type | Video | Video |
| Compression | Lossy | Lossy |
| Best for | sharing and publishing video anywhere | legacy Windows video; converted to MP4 for sharing |
Frequently asked questions
Does converting MP4 to WMV lose quality?
Both MP4 and WMV use compression, so re-encoding discards a little more data. For a single conversion the change is virtually invisible; just avoid repeatedly re-converting the same file.
What's the difference between MP4 and WMV?
MPEG-4 (H.264) (MP4) is lossy and best for sharing and publishing video anywhere. Windows Media Video (WMV) is lossy and best for legacy Windows video; converted to MP4 for sharing. Convert MP4 to WMV when you need a video for legacy Windows video.
Is the MP4 to WMV converter free?
Yes — converting MP4 to WMV is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my MP4 files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert MP4 to WMV on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert MP4 to WMV?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert MP4 files to?
Besides WMV, you can convert MP4 to AAC, AVI, FLAC, FLV, GIF, JPG and more — see the full list of MP4 conversions below.
Other conversions
Last updated July 2026