Convert AAC to MP3.
AAC recordings become MP3s that play absolutely anywhere.
Drop AAC files here
or browse your files
Paste with ⌘V · or drop files anywhere on the page
Files never leave your device. Everything runs in your browser, nothing touches a server — tools you've used even work offline.
Raw .aac files — ADTS streams from voice recorders, broadcast rips and old phones — play in fewer places than they should. Convert them to MP3 entirely in your browser: drop the files, pick a bitrate, download audio that opens anywhere.
How it works
- Drop files anywhere on the page, click to browse, or paste with ⌘V.
- Pick a quality or preset — or set an exact target size and let the tool find it.
- Compress, compare before/after, and download — individually or as a ZIP.
Bare streams vs wrapped audio
Recorders and broadcast tools often write bare ADTS .aac because it needs no finalization — but players want wrapped, tagged files. MP3 is the universal answer; M4A to MP3 covers the wrapped Apple flavor, and the audio tool converts either into M4A, OGG, FLAC and more.
Frequently asked questions
Is AAC the same as M4A?
Same codec, different wrapper. M4A is AAC inside an MP4 container; a raw .aac file is the bare ADTS stream. Both convert here — drop whichever you have.
Does AAC to MP3 cost quality?
Both are lossy, so a little — inaudible when you pick 128 kbps or more for speech and 192 kbps for music. Choosing a bitrate above the source cannot add quality back, it only spends bytes.
Why do some players refuse .aac?
Bare ADTS streams carry no tags and no index, and plenty of software only accepts wrapped, seekable audio. MP3 — or M4A — solves that instantly.
Is it private?
Yes. The audio is decoded and re-encoded entirely in your browser — recordings never leave your device, and the server does nothing but deliver this page. Voice memos, interviews, demos: none of it is uploaded anywhere. Want proof? Run one file through, switch your connection off, and run another — it still works.