Convert AAC to MP3
AAC is the successor to MP3 and sounds better at the same bitrate. It is also the one some devices still will not touch.
Audio only · up to 10 files · 100 MB each — those numbers protect your memory, not our server
Getting the converter ready — this happens once, then your browser keeps it.
The converter could not start.
The engine files are missing from — copy ffmpeg-core.js and ffmpeg-core.wasm there.
Almost always a mismatched build: the worker is an ES module, so the core has to be the esm one too. Copy ffmpeg-core.js and .wasm from @ffmpeg/core/dist/esm/, not dist/umd/.
not in this build of the converter, so it is not offered.
What you lose
A generation, as with any lossy-to-lossy conversion. Because AAC is the stronger codec, going to MP3 at the same bitrate loses a little more than the number suggests — step up one level if the size allows.
What you do not gain
Nothing but reach. You are trading a better codec for a more common one.
What it does to the size
Approximate, for stereo audio at the settings this tool uses by default. The real figure moves with the material — silence and speech compress far better than a full mix.
When this is the right conversion
A player, a car or a piece of software that only speaks MP3. Otherwise there is no reason to leave AAC.
Other conversions
This tool is free because dbelo is a library of sound effects, and we would rather you found us this way than not at all.
Browse the sound library