Convert AAC to FLAC
AAC is great for efficient music files and broadcast audio, but FLAC is the better choice for archiving CDs and hi-res music without quality loss. Convert AAC to FLAC in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert AAC to FLAC
- 1
Tap Choose files and select one or more AAC files (or drag them in).
- 2
Check that FLAC is selected. Use Advanced options for bitrate, channels or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your FLAC downloads automatically. Converting several files? Grab them all as a ZIP.
AAC vs FLAC
FLAC is lossless, but it can't restore detail already removed by AAC's compression — the file just gets bigger. Convert when an app or editor requires FLAC.
| AAC | FLAC | |
|---|---|---|
| Full name | Advanced Audio Coding (raw ADTS) | Free Lossless Audio Codec |
| Type | Audio | Audio |
| Compression | Lossy | Lossless |
| Developed by | MPEG | Xiph.Org |
| Introduced | 1997 | 2001 |
| Plays on iPhone | ✓ Yes | ✓ Yes |
| Plays on Android | ✓ Yes | ✓ Yes |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ✓ Yes | ✓ Yes |
About AAC and FLAC
AAC: AAC is the successor to MP3 and the audio codec behind YouTube, iTunes and most streaming services. A .aac file stores the raw AAC stream without an MP4 wrapper.
FLAC: FLAC is an open lossless format that shrinks audio to 50–60% of WAV size without losing any quality. It is the favourite format of audiophiles and hi-res music stores.
Frequently asked questions
How do I convert AAC to FLAC on my phone?
Will converting AAC to FLAC reduce quality?
Is this AAC to FLAC converter free?
Are my files uploaded to a server?
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