WMA to M4A Converter

Convert WMA files to M4A free in your browser — no signup, no install, and the file is never uploaded to a server. M4A opens almost anywhere, so the result works where WMA did not.

Completely free Files are never uploaded No signup required
Drop files or click to select
WMA → M4A

What changes in this conversion

  • M4A opens almost everywhere, so the converted file will work on devices and programs that refused the original WMA.

How to use

  1. Add your WMA file

    Drag the WMA file onto the drop area above, or click it to pick a file from your device. You can add several files at once.

  2. Confirm M4A as the output

    M4A is already selected as the output format on this page. You can pick the bitrate — higher keeps more of the sound, lower makes a smaller file.

  3. Run the conversion

    Press the convert button. Audio decodes and re-encodes in your browser — a normal song finishes in a few seconds.

  4. Download the M4A file

    When it finishes, download the M4A file. Converting multiple files gives you the option to download them together as a ZIP.

About these formats

WMA Windows Media Audio

A lossy format created by Microsoft. Playback outside Windows is awkward, so files are commonly converted to MP3.

Commonly used for Legacy Windows music libraries

WMA File format reference

M4A M4A Audio

An audio file in an MPEG-4 container, usually compressed with AAC. iPhone voice memos and iTunes purchases use this format.

Commonly used for iPhone voice memos, Apple ecosystem audio

M4A File format reference

Frequently asked questions

Is converting WMA to M4A really free?

Yes. WMA to M4A conversion is completely free with no signup, no watermark, and no daily limit on the free plan for ordinary use.

Are my WMA files uploaded to a server?

No. The conversion runs entirely inside your browser using WebAssembly, so the WMA file never leaves your device. That is also why it works without an internet connection once the page has loaded.

Is there a file size limit for WMA to M4A conversion?

The free plan handles files up to 200MB. Because processing happens on your own device, very large files depend on your computer's memory rather than a server quota.

Convert WMA files to other formats

WMA AAC WMA FLAC WMA MP3 WMA OGG WMA OPUS WMA WAV

Convert other formats to M4A

3G2 M4A 3GP M4A AAC M4A AC3 M4A AIF M4A AIFF M4A ALAC M4A AMR M4A ASF M4A AU M4A AVI M4A DIVX M4A

Audio converter

What each file format is, what it is used for, and which formats it can be converted to.

Open converter Browse the full format reference