WMA to M4A Converter
Convert WMA to M4A online for free. Change audio format for playback, editing, uploads, podcasts, ringtones, archiving, or a better balance between file size and sound quality.
Converting WMA to M4A re-encodes the audio using the target codec. Sample rate and channel layout are preserved, and ID3 metadata (artist, title, album art) carries over. File size and quality depend on the M4A codec — lossy targets shrink size; lossless targets preserve every sample.
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Checking files and selected output formats.
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Convert WMA Audio in 3 Steps
Switch codecs or containers while keeping the audio ready for streaming, editing, downloads, or device playback.
Select your WMA audio files — music tracks, podcasts, voice recordings, or sound effects. Batch upload entire albums or playlists for bulk conversion.
Your WMA audio is re-encoded to M4A using the optimal codec settings. The original sample rate (44.1 kHz / 48 kHz) is preserved, and ID3 metadata — artist, title, album art — carries over automatically.
Download your converted M4A files with all metadata intact. Batch results come as a ZIP. Files are deleted from our servers within 24 hours.
Why Convert WMA to M4A
M4A is the standard audio format for iPhone, iPad, Mac, and Apple Watch. Voice memos, Apple Music downloads, and iTunes purchases all use M4A for the best playback experience on Apple hardware.
M4A uses AAC encoding, which delivers superior audio quality compared to MP3 at equivalent bitrates. At 256 kbps, M4A is virtually indistinguishable from CD quality to most listeners.
M4A containers can hold Apple Lossless (ALAC) encoded audio for bit-perfect quality. Apple Music Lossless subscribers receive ALAC in M4A files for the highest quality listening experience.
M4A supports chapter markers with titles and artwork, making it ideal for enhanced podcasts. Listeners can jump between segments and see chapter-specific images in compatible podcast apps.
M4A (and its M4B audiobook variant) efficiently compresses long spoken-word content with chapter navigation and bookmark support. Apple Books and other audiobook apps handle M4A files natively.
WMA vs M4A: Side-by-side
Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.
| Property | WMA | M4A |
|---|---|---|
| Full name | Windows Media Audio | MPEG-4 Audio (AAC container) |
| Year introduced | 1999 | 1999 |
| Developer / standard body | Microsoft | Apple |
| MIME type | audio/x-ms-wma | audio/m4a |
| File extension | .wma | .m4a |
| Compression | Lossy or lossless (WMA9) | Lossy (AAC) or lossless (ALAC) |
| Color / data depth | N/A | N/A |
| Max dimensions / size | Up to 768 kbps | Up to 320 kbps |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | Microsoft (proprietary) | ISO/IEC 14496-14 |
| Best for | Legacy Windows audio playback | iTunes, Apple Music, podcast distribution |
WMA to M4A FAQ
Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert WMA files to M4A.
How do I convert WMA to M4A online?
Why would I convert WMA to M4A?
Will converting WMA to M4A improve audio quality?
How will file size change when converting WMA to M4A?
Can I batch convert multiple WMA files to M4A?
Is it safe to convert WMA to M4A online?
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