Convert M4A to WMA — Free Online Converter
Convert MPEG-4 Audio (.m4a) to Windows Media Audio (.wma) online for free. Fast, secure audio conversion with no watermarks or registration....
2M+ filer konverterade
Betrodd av tusentals användare
Saker overforing
HTTPS-krypterade uppladdningar
Integritet forst
Filer raderas automatiskt efter bearbetning
Ingen registrering
Borja konvertera direkt
Fungerar overallt
Valfri webblasare, valfri enhet
Hur man konverterar
Upload your .m4a 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.
About M4A to WMA Conversion
WMA (Windows Media Audio) is Microsoft's proprietary audio codec developed as a competitor to MP3 in 1999. Converting M4A to WMA moves audio from Apple's ecosystem to Microsoft's. This is relevant for older Windows devices, Zune media players, certain car stereos, and DLNA media servers that prefer WMA. The conversion re-encodes AAC or ALAC audio to WMA inside Microsoft's ASF container.
Why Convert M4A to WMA?
Some car stereos from the mid-2000s to early 2010s support WMA and MP3 but not AAC/M4A. Microsoft's Zune ecosystem and older Windows Media Center installations prefer WMA. DLNA media servers may transcode M4A to WMA for certain client devices. Enterprise media systems standardized on Microsoft formats may require WMA input.
Common Use Cases
- Playing audio through car stereos that support WMA but not M4A/AAC
- Loading music onto a Zune HD or older Windows Phone
- Streaming through DLNA servers to WMA-preferred devices
- Converting for corporate media systems standardized on Windows Media formats
- Creating audio for Windows Media Center home theater setups
How It Works
FFmpeg decodes the M4A audio (AAC or ALAC) to PCM and encodes using wmav2 inside an ASF container with .wma extension. WMA v2 supports 32-320 kbps at sample rates up to 48 kHz. WMA Pro supports higher bitrates and multichannel, but has limited device support. WMA Lossless is also available for bit-perfect conversion from ALAC M4A.
Quality & Performance
WMA at 192 kbps is comparable to MP3 at 192 kbps. At 256+ kbps, quality is very good. Converting from lossy AAC M4A to lossy WMA introduces generational loss — use the highest practical bitrate to minimize degradation. From ALAC M4A, a single generation of WMA compression applies.
Device Compatibility
| Device | M4A | WMA |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Native | Partial |
| iPhone/iPad | Native | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Recommended Settings by Platform
Spotify
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Apple Music
Resolution: N/A
Bitrate: 256 kbps
AAC format required
SoundCloud
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Podcast
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
Tips for Best Results
- 1Use 256 kbps WMA for music to minimize generational quality loss from AAC source
- 2Check if your target device also supports MP3 — it may be a better cross-platform choice
- 3WMA Lossless is available for archival-quality conversion from ALAC M4A to Microsoft's ecosystem
- 4Test on the target device before batch converting — WMA version support varies
Related Conversions
M4A to WMA bridges the gap between Apple and legacy Microsoft ecosystems. Use the highest available bitrate and consider whether MP3 might serve the same purpose with broader compatibility.