Tools / File Converter / AAC to FLAC Converter

AAC to FLAC Converter

Convert AAC files to FLAC. Free, without uploading.

This tool converts AAC files to FLAC. AAC is the lossy codec designed to succeed MP3; it sounds better than MP3 at the same bitrate.

FLAC is lossless compressed audio: about half the size of WAV with no quality loss. FLAC is lossless, so the audio keeps the quality it has in the AAC file.

Conversion runs on your device; your file is never sent to a server. The components download once on first use, and later conversions start right away.

How to use

1. Choose the AAC file, drag it in, or paste its link.
2. Choose the audio quality; optionally enter a start and end time.
3. Press "Convert" and download the FLAC file.

Frequently asked questions

Will audio quality drop when converting to FLAC?

No. FLAC is lossless.

Is there a file size limit?

No fixed limit; your device’s memory decides. Computers usually handle files up to 1–2 GB.

Is my file uploaded?

No. Your AAC file is converted to FLAC inside your browser.