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convertexa

WMA → M4A

WMA to M4A converter

convertexa converts WMA files to M4A locally in your browser using a dedicated ffmpeg engine. Nothing is uploaded: the file is read, converted and handed straight back to you as a download.

  • Free, no sign-up
  • Nothing is uploaded
  • Works offline
Quality
Re-encoded
Runs
In your browser
Max input
300 MB
Status
stable

Drop a file to convert

Everything happens on your device — nothing is uploaded.

or paste with Ctrl+V

How to convert WMA to M4A

  1. 1 Drop your WMA file here.
  2. 2 Choose M4A as the output format and adjust the options.
  3. 3 Convert and download the result.

About WMA and M4A

WMA is decoded with FFmpeg; the browser has no native WMA support.

M4A is an AAC stream inside an MP4 container.

WMA files are read by the convertexa engine that ships with this page, so the conversion is identical whether you use this tool or the general converter. The output is produced with the same codec settings for every visitor, which means the same input always produces the same result.

Limitations

  • The conversion runs in your browser, so very large files can exhaust the memory available to the tab.

Frequently asked questions

How do I convert a WMA file to M4A?

Add your WMA file to the box above. convertexa detects the format from the file content, applies the WMA to M4A conversion and gives you the result to download. The whole operation runs inside your browser.

Are my WMA files uploaded anywhere?

No. The conversion runs in a sandboxed worker on your own device. Your file never leaves the browser, and nothing is stored on a server.

Is the WMA to M4A conversion lossless?

No. M4A is a re-encoded format, so some data is discarded to reach the target format. WMA is decoded with FFmpeg; the browser has no native WMA support.

Is there a size limit?

For reliable results keep the input under 300 MB. Very large files run out of memory in the browser rather than failing quietly.

Which browsers are supported?

Any current version of Chrome, Edge, Firefox or Safari on a desktop. The conversion engines need WebAssembly and Web Workers, both of which are standard since 2018.