Convert MPEG-4 Part 14 (.mp4) to Windows Media Audio (.wma) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .mp4 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 .wma file when it's ready.
MP4 to WMA conversion extracts the audio track from an MPEG-4 video and encodes it as a Windows Media Audio file. WMA was developed by Microsoft as a competitor to MP3 and AAC, and it remains deeply integrated into the Windows ecosystem. Windows Media Player, Windows Phone (legacy), and many Windows-based car stereo systems use WMA as their preferred audio format.
Our converter decodes the MP4 audio stream and re-encodes it using the WMA v2 codec via FFmpeg. The output is wrapped in the ASF (Advanced Systems Format) container with the .wma extension.
WMA conversion serves Windows-centric environments where WMA is the expected format. Some older Windows car stereo head units only support WMA and MP3 for USB playback — AAC files are ignored. Windows Phone devices prioritized WMA for syncing via Zune software. Corporate environments running Windows Media Services for internal streaming may require WMA input. While WMA's relevance has declined, these legacy systems still exist in significant numbers.
FFmpeg decodes the MP4 audio and re-encodes using the wmav2 (Windows Media Audio v2) codec. Standard WMA supports bitrates from 32 to 320 kbps at sample rates up to 48 kHz in stereo. The output is containerized in ASF format with .wma extension. WMA v2 is a lossy perceptual codec based on modified discrete cosine transform (MDCT). WMA Pro and WMA Lossless variants exist but have more limited player support.
WMA v2 at 128 kbps is roughly comparable to MP3 at 128 kbps — adequate for casual listening but noticeably compressed compared to the source. At 192 kbps and above, quality improves significantly and approaches transparency for most content. WMA handles low bitrates (64-96 kbps) better than MP3 for speech content, making it competitive for voice recordings and podcasts.
| Device | MP4 | WMA |
|---|---|---|
| Windows PC | Native | Native |
| macOS | Native | Partial |
| iPhone/iPad | Native | Partial |
| Android | Native | Partial |
| Linux | Partial | Partial |
| Web Browser | Native |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
MP4 to WMA serves the Windows and legacy device ecosystem. When your playback environment requires WMA, this conversion delivers reliable, compatible audio files.
Sikker overføring
HTTPS-krypterte opplastinger
Personvern først
Filer slettes automatisk etter behandling
Ingen registrering
Begynn å konvertere med en gang
Fungerer overalt
| No |
8MB free, 50MB Nitro
Alle nettlesere, alle enheter
| Egenskap | MP4 | WMA |
|---|---|---|
| Fullt navn | MPEG-4 Part 14 | Windows Media Audio |
| Filendelse | .mp4 | .wma |
| Best egnet for | Universal compatibility | Windows native |