Convert AAC to FLAC online in seconds — free, with no sign-up. FLAC is lossless and ideal for archiving and audiophile listening. Your files are encrypted and deleted automatically after 24 hours.
AAC
Advanced Audio Coding — A modern lossy codec that sounds better than MP3 at the same bitrate; Apple's default.
FLAC
Free Lossless Audio Codec — Open-source lossless audio that's 40–60% smaller than WAV with zero quality loss.
How to convert AAC to FLAC
- 1Upload your AAC file
Click “Choose a file” or drag and drop your AAC file onto the page — no sign-up or email needed.
- 2Convert to FLAC
FLAC is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your FLAC file
Your FLAC file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
AAC vs FLAC
| AAC | FLAC | |
|---|---|---|
| Full name | Advanced Audio Coding | Free Lossless Audio Codec |
| Type | Audio | Audio |
| Compression | Lossy | Lossless |
| Best for | the Apple ecosystem and high-quality streaming | archiving and audiophile listening |
Frequently asked questions
Does converting AAC to FLAC lose quality?
Your AAC file is already compressed, so converting to lossless FLAC can't restore detail that was discarded earlier — but it won't lose any more. The FLAC file matches your AAC file exactly.
What's the difference between AAC and FLAC?
Advanced Audio Coding (AAC) is lossy and best for the Apple ecosystem and high-quality streaming. Free Lossless Audio Codec (FLAC) is lossless and best for archiving and audiophile listening. Convert AAC to FLAC when you need a audio for archiving and audiophile listening.
Is the AAC to FLAC converter free?
Yes — converting AAC to FLAC is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my AAC files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert AAC to FLAC on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert AAC to FLAC?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert AAC files to?
Besides FLAC, you can convert AAC to AIFF, M4A, MP3, OGG, OPUS, WAV and more — see the full list of AAC conversions below.
Other conversions
Last updated July 2026