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WAV to M4A - Online Audio Converter
Convert WAV to M4A online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert WAV to M4A
Drop WAV audio here or click to select
WAV
M4A (AAC)
About WAV to M4A
Convert WAV to M4A. WAV is Microsoft's RIFF container, usually holding 16-bit PCM. 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 WAV to M4A?
- Smaller files with M4A lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
WAV vs M4A
| Codec | PCM 16-bit | AAC |
|---|---|---|
| Compression | uncompressed | lossy |
| Sample behavior | Full quality kept | Quality set by bitrate |
| Typical use | WAV is Microsoft's RIFF container, usually holding 16-bit PCM. | M4A is the MPEG-4 audio container usually holding AAC or ALAC. |
When not to convert WAV to M4A
- Skip M4A for archival masters: lossy compression discards detail, so keep the WAV original.
- Keep a master copy: repeated exports stack small losses, so archive WAV before batch M4A shares.
Limits
Starting point: WAV - 16-bit PCM near 10 MB per minute. Files run about 10 MB per minute, so archive as FLAC. Check whether the track is AAC or ALAC before picking settings. Encode M4A (AAC) from WAV 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 WAV to M4A?
Drop your WAV 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.