Convert M4A files to MP3 free in your browser — no signup, no install, and the file is never uploaded to a server. MP3 compresses further, so the file gets noticeably smaller.
Add your M4A file
Drag the M4A file onto the drop area above, or click it to pick a file from your device. You can add several files at once.
Confirm MP3 as the output
MP3 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.
Run the conversion
Press the convert button. Audio decodes and re-encodes in your browser — a normal song finishes in a few seconds.
Download the MP3 file
When it finishes, download the MP3 file. Converting multiple files gives you the option to download them together as a ZIP.
An audio file in an MPEG-4 container, usually compressed with AAC. iPhone voice memos and iTunes purchases use this format.
The most widely used lossy audio format, discarding sound humans barely perceive to shrink files roughly tenfold. It is hard to find a device that cannot play it.
Yes. M4A to MP3 conversion is completely free with no signup, no watermark, and no daily limit on the free plan for ordinary use.
No. The conversion runs entirely inside your browser using WebAssembly, so the M4A file never leaves your device. That is also why it works without an internet connection once the page has loaded.
MP3 uses lossy compression, so some detail is discarded. At high quality settings the difference is usually invisible, and the file becomes far smaller.
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.
Audio converter
What each file format is, what it is used for, and which formats it can be converted to.
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