Convert WMA to M4A

Convert WMA files to M4A locally, completely free and with maximum privacy.

Drag and drop your files here

or click to browse local files (large files supported, limited only by browser RAM)

Upload Files

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How to convert WMA to M4A

Drop your .wma files above, or click Upload Files. You can add many files at once.
M4A is already selected as the output. Open the settings (gear icon) to fine-tune the result.
Click Convert All. FFmpeg runs inside your browser through WebAssembly; nothing is uploaded.
Download your .m4a files as soon as each one finishes.

What to know about WMA to M4A conversion

Converting a lossy WMA to M4A cannot restore detail that was already discarded, but it avoids any further loss in later edits.
You can choose the bitrate, sample rate and channels (mono, stereo or a 3D spatial effect).

WMA vs M4A

Feature	WMA (Windows Media Audio)	M4A (MPEG-4 Audio)
Compression	lossy	lossy or lossless
Best for	Windows Media Player libraries	iTunes, iPhone ringtones and podcasts
Opens in	Windows Media Player, VLC, mpv and most media players	Apple devices, browsers and most media players

WMA (Windows Media Audio): A lossy audio codec and container developed by Microsoft for Windows Media Player.

M4A (MPEG-4 Audio): An audio-only file extension for MPEG-4 files, commonly encoded with AAC or ALAC codecs for high quality.

Conversion options

Bitrate from 96 to 320 kbps
Apple Lossless (ALAC) mode
Sample rate: 22.05, 44.1 or 48 kHz
Mono, stereo or 3D spatial audio
Playback speed (0.5× to 2×)

Frequently asked questions

Is it safe to convert WMA to M4A here?

Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.

Is there a file size limit?

There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.

Can I convert several WMA files at once?

Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.

Related conversions

Need the opposite? Convert M4A to WMA.

Convert WMA to other formats

Convert other formats to M4A

See every WMA converter and M4A converter, or browse the full converter directory.