AAC to FLAC
Re-encodes AAC to lossless FLAC, though it can't recover what AAC already discarded.
Drop an AAC file here
Everything happens on your device — your files are never uploaded.
file.aac
—
Converting…
Done
How it works
- 1 Drop your AAC file or pick it from your device.
- 2 Click Convert to FLAC and watch the progress bar as it encodes.
- 3 Download your FLAC. It never leaves your browser.
Built with open source
- Mediabunny — Converts and edits video and audio in the browser via WebCodecs. Add-on encoders cover MP3, AAC, and FLAC. · MPL-2.0
Frequently asked
Will FLAC make my AAC sound better? +
No. AAC is lossy, so whatever detail got thrown away in the original encode is gone for good. FLAC is lossless and keeps the decoded AAC audio exactly as it is, but it can't put back quality the source never had.
Why convert AAC to FLAC then? +
FLAC is the format you want for archiving and for libraries that expect lossless files. Once your audio is FLAC, it survives more copies and edits without losing anything along the way.
Why does it take a moment to start? +
Browsers have no built-in FLAC encoder, so one loads the first time you use the tool. That adds a short delay. Everything runs on your device, and your AAC file is never uploaded.