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Free converter
Anyfile converts an AAC audio to a FLAC audio for free, right in your browser: the file is never uploaded.
Files are converted in your browser and never uploaded. By using Anyfile you agree to the Terms of Use.
| Sound quality | No further loss (what AAC already left out doesn’t come back) |
|---|---|
| Tags and cover art | Title, artist, album and cover carried over where FLAC holds them; lyrics and some rarer tags aren’t yet |
| File size | Usually larger: FLAC compresses less tightly than AAC |
When to use FLAC: Archiving CDs and high-resolution music without any loss of quality.
.aac
A lossy codec standardised by MPEG in 1997 as the successor to MP3, usually sounding better at the same bit rate. A bare .aac file holds the raw stream without an MP4 wrapper.
Streaming audio, digital radio and soundtracks taken from video files.
Opens in Music, QuickTime, VLC, Windows Media Player, most phones
About AAC files.flac
A lossless audio codec created by Josh Coalson in 2001 and now maintained by the Xiph.Org Foundation. Files are noticeably smaller than WAV yet decode to an exact copy of the original.
Archiving CDs and high-resolution music without any loss of quality.
Opens in VLC, foobar2000, Windows Media Player, Audacity
About FLAC filesGoing the other way? Convert FLAC to AAC
Everything that converts to FLAC
Need to change it first? Open the audio editor
Drop your AAC file on this page, or choose it. Anyfile converts it on your device in a moment and the FLAC downloads straight away. To change it first, open it in the audio editor.
No. The file is read and converted by your own browser, and nothing is sent to a server. You can check: open your browser’s developer tools, go to Network, and convert a file. No upload appears.
Yes. Drop them together and you get one ZIP with every FLAC inside.