How do I convert AAC to FLAC?

Upload your AAC file using the box above, confirm FLAC as the output format, then select Convert. The converted file is ready to download as soon as processing finishes — usually in a few seconds.

Is converting AAC to FLAC free?

Yes, and there is nothing to sign up for. Every conversion is free, there is no paid tier, and the limits are the same for everyone.

Will the quality change when converting to FLAC?

Converting to FLAC is lossless, but it cannot restore detail that the original AAC file already discarded. The result matches the source exactly as it is.

What happens to my file afterwards?

The uploaded file is deleted as soon as the conversion completes, and the converted file is removed automatically once its retention window ends. Download links are signed and expire within minutes.

aacflac

Convert AAC to FLAC

Free online converter for AAC files. Lossless compression with roughly half the size of WAV. Nothing to install, no watermark, and every file is deleted automatically.

Drag and drop your files

Upload a AAC file to convert it to FLAC. Up to 200 files at once, 10 GB each.

Free · up to 200 files · 10 GB each · files deleted automatically after 168 hours.

About AAC and FLAC

AAC

Efficient successor to MP3 used in broadcast and streaming.

audio/aac

FLAC

Lossless compression with roughly half the size of WAV.

audio/flac

Other AAC conversions

aac to mp3
aac to wav
aac to ogg
aac to opus
aac to m4a

Other ways to get FLAC

mp3 to flac
wav to flac
ogg to flac
opus to flac
m4a to flac
mp4 to flac
webm to flac
mkv to flac