AAC to MP3 Converter
Convert AAC to MP3. Batch-ready, stays in your browser.
Best for making iPhone recordings or iTunes audio play on car stereos, older phones, or non-Apple gear.
Drop files here
or click to browse · paste from clipboard
Accepts .AAC, .M4A · Up to 1,000 files
How it works
Drop your files
Drag and drop, click to browse, or paste from clipboard. Up to 1,000 files at once.
Click Convert
Everything runs in your browser via WebAssembly. AAC to MP3 Converter happens locally — no server involved.
Download
Download files individually or grab all at once as a ZIP.
Frequently asked questions
No. Conversion runs in your browser using ffmpeg.wasm — a full media engine compiled to WebAssembly. Your audio never touches a server.
Yes, slightly. Both AAC and MP3 are lossy formats, so you go through a second round of compression. The output is good enough for playback and sharing, but not identical to the source. Keep the original AAC if you need to archive or re-edit.
Yes. M4A is AAC audio inside an MPEG-4 container — this tool accepts both .aac and .m4a files and outputs MP3.
Convert when the destination device or software does not support AAC — common cases are older car stereos, some Android media players, and legacy audio software. For anything modern, AAC is the better format.
The output MP3 will reflect the same low quality — converting cannot recover audio detail that was discarded during the original AAC encoding. If the source sounds bad, the MP3 will too.