AAC to MP3 Converter
Convert AAC files to MP3 instantly and privately. File Converts runs entirely in your browser, so your AAC is never uploaded to any server.
Plays everywhere — the safe default for sharing.
At a glance
- Where it runs
- Runs in your browser — your file is never uploaded.
- File size
- Up to 500 MB per file.
- Offline
Works offline after you have used it once: the engine downloads the first time and is kept. About 30 MB, once.
- Batch
- Several files at once.
- Cost
- Free, with no account and no daily limit.
AAC was designed as MP3's successor and generally sounds better at the same bitrate, which is why YouTube, Apple Music and most streaming services use it. The reason to convert away from it is never quality — it is that some car stereos, older DAPs, gym equipment and embedded players only ever learned MP3.
Both formats are lossy, so this conversion is a second generation: the encoder decodes audio that already had detail discarded, then discards more. At 192 kbps or above the difference is inaudible on ordinary equipment. At 128 kbps and below, converting a file that was already 128 kbps is where people start hearing the smeared cymbals and hollow vocals that make a track sound "converted".
Convert once, from the highest-quality AAC you have, and keep that original. Everything runs in your browser through a WebAssembly build of FFmpeg, so an album you own is never uploaded to anyone.
Best for
- Making an AAC track or recording play on a device or app that needs MP3
- Standardising an AAC music library to MP3
- Sharing audio in the format everyone can open
Good to know
Converts AAC audio to widely-compatible MP3. Both are lossy, so converting re-encodes once — inaudible at a good bitrate, but avoid repeatedly converting back and forth. Choose a higher bitrate for music, lower for spoken word.
How to convert AAC → MP3
Drop your AAC file into the converter above — it stays on your device.
Choose MP3 as the output. File Converts picks the smartest settings automatically.
Click Convert and download your MP3 file instantly.