Convert WMV files to MP4 format instantly. Free online converter for Windows Media videos. Works on all devices.
Conversion settings — add a file to adjust
Upload your .wmv file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mp4 file when it's ready.
WMV (Windows Media Video) was Microsoft's answer to video compression in the early 2000s, but the format has become increasingly problematic in today's cross-platform world. Mac users can't play WMV natively. Smartphones struggle with the format. Even modern Windows PCs sometimes require codec packs. Converting WMV to MP4 modernizes your video library for universal playback.
Our WMV to MP4 converter transforms legacy Windows Media files into the universally accepted MP4 format. The process preserves video quality while dramatically improving compatibility. Most devices that struggle with WMV play MP4 flawlessly without any additional software.
WMV's platform limitations create constant headaches. Videos that play fine on older Windows PCs fail on MacBooks, iPhones, Android phones, and smart TVs. Sharing WMV files means recipients often can't view them. The format's age shows in these daily frustrations.
MP4 eliminates compatibility concerns entirely. It's the lingua franca of digital video—every modern device and platform supports it natively. No codec packs, no player apps, no workarounds needed.
The conversion also benefits video quality. MP4's H.264 codec achieves better quality per byte than WMV's older compression. Your converted files can actually look better while being smaller, especially for older WMV files encoded at low bitrates.
Our converter decodes WMV using FFmpeg's robust Windows Media support, handling both WMV7, WMV8, and WMV9 codecs. Video is re-encoded to H.264 with CRF 20 for optimal quality, while audio converts to AAC 192kbps.
For WMV files with Windows Media Audio (WMA), the converter extracts and transcodes to AAC seamlessly. Multi-channel audio (5.1, 7.1) downmixes to stereo by default, with an option to preserve surround sound for compatible devices.
WMV to MP4 requires transcoding since the codecs are fundamentally different. Our encoder produces MP4 files that match or exceed WMV visual quality. For heavily compressed WMV source files, the conversion cannot restore detail—quality reflects the original encoding.
| Device | WMV | MP4 |
|---|---|---|
| iPhone/iPad | No | Native |
| Android | No | Native |
| Windows PC | Native | Native |
| Mac | No | Native |
| Smart TV | No | Native |
| Web Browser | No |
| Speed | ~5 seconds for a 10-second clip. |
| Output size | Comparable to the source at a visually-lossless default. |
| Quality | Re-encoded to H.264/AAC — plays on Mac, iOS and phones where WMV won't. |
| Engine | FFmpeg (libx264), server-side. |
Measured on our servers, June 2026, on a 10-second 1280×720 clip.
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 High Profile, AAC audio
Resolution: 1080x1920
Bitrate: 3.5 Mbps
Vertical 9:16, max 90 seconds
Resolution: 960x540
Bitrate: 1-2 Mbps
Max 16MB, keep under 3 minutes
Resolution: 1080x1920
Bitrate: 4-6 Mbps
Vertical, max 10 minutes
Resolution: 1920x1080
Bitrate: 5-8 Mbps
Max 512MB, max 2:20 minutes
Resolution: 1280x720
Bitrate: 2-4 Mbps
Bring your Windows Media library into the modern era. Our WMV to MP4 converter creates universally playable videos from legacy files, ending compatibility frustrations forever.
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| Native |
Max 25MB free, 100MB Nitro
Enhver browser, enhver enhed
| Funktion | WMV | MP4 |
|---|---|---|
| Fulde navn | Windows Media Video | MPEG-4 Part 14 |
| Filendelse | .wmv | .mp4 |
| Bedst til | Windows native | Universal compatibility |