AAC to MP3
Drop an AAC file and get MP3, for the app, device or editor that needs it.
Your file stays on your device. Nothing is uploaded.
AAC to MP3 in three steps
Drop your AAC
Up to 500 MB.
Convert
It's saved as MP3 at the bitrate you choose (128, 192 or 320 kbps).
Download the MP3
Ready to use.
AAC and MP3, explained
AAC is the audio codec inside M4A and MP4 files, here as a raw .aac file. It sounds good at small sizes, but some apps only open it wrapped as M4A.
MP3 is the format every phone, car and app plays. It's lossy: it drops the sounds people hear least to keep files small.
Both are compressed formats, so converting re-encodes the sound once. At a good bitrate the difference is hard to hear.
Frequently
Asked Questions
Does converting AAC to MP3 lose quality?
MP3 is lossy, so a little. At 192 kbps or more it's hard to hear.
Will the MP3 be bigger or smaller?
About the same, depending on the bitrate you pick.
How long does it take?
Seconds for most files: audio converts quickly, even in the browser.
Is my file uploaded?
No. It's processed in your browser, on your own device, and never leaves it.