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 to AAC Converter
Convert WMA files to AAC free in your browser — no signup, no install, and the file is never uploaded to a server. AAC 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 → AAC
What changes in this conversion
- AAC opens almost everywhere, so the converted file will work on devices and programs that refused the original WMA.
- Both WMA and AAC are lossy, so re-encoding discards a little more audio detail on top of what was already lost. Converting once is fine; repeating it many times is not.
How to use
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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.
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Confirm AAC as the output
AAC 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.
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Run the conversion
Press the convert button. Audio decodes and re-encodes in your browser — a normal song finishes in a few seconds.
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Download the AAC file
When it finishes, download the AAC file. Converting multiple files gives you the option to download them together as a ZIP.
About these formats
AAC
AAC Audio
A lossy format designed as MP3's successor, delivering better quality at the same file size. It is the default for iTunes, YouTube, and streaming services.
Commonly used for
Streaming audio, mobile music
Frequently asked questions
Is converting WMA to AAC really free?
Yes. WMA to AAC 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 AAC 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
Convert other formats to AAC
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