Convert AAC to FLAC
A free, online converter from AAC to FLAC. Perfect-quality result. No sign-up, nothing uploaded.
Drop AAC files here
or choose files
AAC
Up to 500 MB per file. Stays on your device — never uploaded.
Why convert AAC to FLAC?
AAC — What YouTube, iTunes, and most streaming sites use. A modern step up from MP3.
FLAC — A perfect-quality copy of the original. Great for music libraries you want to keep for years.
One thing to keep in mind: a AAC file has already had some of its sound removed to keep the file small. Saving it as FLAC keeps what's there but cannot put the missing sound back. This kind of conversion is for when a program or app needs a FLAC file, not for making the song sound better.
All of this happens right inside your web browser. Your file stays on your phone or computer the whole time.
Frequently asked questions
No. AAC files have already had some sound removed to make them small. Saving them as FLAC keeps everything that is there now, but it cannot bring back the missing sound. FLAC is most useful when you start from a perfect-quality file in the first place.
Quick conversions
Looking for a specific change? Pick one below.