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WMA to M4A - Online Audio Converter
Convert WMA to M4A online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert WMA to M4A
Drop WMA audio here or click to select
WMA
M4A (AAC)
About WMA to M4A
Convert WMA to M4A. WMA is Microsoft's audio codec paired with Windows Media workflows. M4A is the MPEG-4 audio container usually holding AAC or ALAC. Check whether the track is AAC or ALAC before picking settings..
Why convert WMA to M4A?
- Smaller files with M4A lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
WMA vs M4A
| Codec | WMA v2 | AAC |
|---|---|---|
| Compression | lossy | lossy |
| Sample behavior | Quality set by bitrate | Quality set by bitrate |
| Typical use | WMA is Microsoft's audio codec paired with Windows Media workflows. | M4A is the MPEG-4 audio container usually holding AAC or ALAC. |
When not to convert WMA to M4A
- Skip M4A for archival masters: lossy compression discards detail, so keep the WMA original.
- Keep a master copy: repeated exports stack small losses, so archive WMA before batch M4A shares.
Limits
Starting point: WMA - WMA is Microsoft's audio codec paired with Windows Media workflows. Copy-protected store files cannot be converted; use DRM-free sources. Check whether the track is AAC or ALAC before picking settings. Encode M4A (AAC) from WMA at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.
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FAQ
How do I convert WMA to M4A?
Drop your WMA file onto this page, choose quality and codec settings, then click Convert. The result downloads as M4A instantly. All processing runs in your browser.
What codec is used for M4A?
The default codec for M4A is AAC. You can change audio parameters in Advanced mode.
How do you store my files?
We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.