Convert AAC to FLAC
The fastest way to convert Advanced Audio Coding to Free Lossless Audio Codec online. Free, secure, and works on any device.
1How to convert AAC to FLAC
Drag & drop your AAC file into the box above.
Click "Convert" to transform it to FLAC instantly.
Save your new file to your device.
2Why use Flux Converter?
Zero Data Usage
Files are converted in your browser. No uploading means no data usage and total privacy.
Lightning Fast
Powered by WebAssembly, conversions happen instantly on your device.
No Limits
Convert as many files as you want, of any size.
Universal
Works on Windows, Mac, Linux, Android, and iOS.
3Why convert AAC to FLAC?
Understanding the strengths and limitations of each format helps you decide when converting from AAC to FLAC makes sense. AAC was standardized in 1997 as part of MPEG-2 and later MPEG-4. Apple's adoption for iTunes in 2003 made it the dominant lossy format alongside MP3. FLAC was developed by Josh Coalson and released in 2001. It has become the preferred format for lossless audio distribution and archival.
AAC
FLACTarget
4Technical Details
| Feature | AAC | FLAC |
|---|---|---|
| Full Name | Advanced Audio Coding | Free Lossless Audio Codec |
| MIME Type | audio/aac | audio/flac |
| Category | Audio | Audio |
| Use Cases | Apple Music and iTunes Store, YouTube audio, Digital radio broadcasting, Mobile audio streaming | Audiophile music collections, Music archival and preservation, Hi-fi streaming (Tidal, Qobuz), Studio audio backup |
| Description | AAC is an audio coding standard for lossy digital audio compression. It is designed to be the successor to the MP3 format with better sound quality. | FLAC is an audio coding format for lossless compression of digital audio. It reduces file size without any loss of quality. |
5Frequently Asked Questions
What is the difference between AAC and FLAC?
AAC (Advanced Audio Coding) and FLAC (Free Lossless Audio Codec) serve different purposes. AAC is an audio coding standard for lossy digital audio compression. It is designed to be the successor to the MP3 format with better sound quality. On the other hand, FLAC is an audio coding format for lossless compression of digital audio. It reduces file size without any loss of quality. Converting between them lets you leverage the strengths of each format depending on your needs.
Does converting AAC to FLAC lose quality?
This depends on the formats involved. If the target format (FLAC) uses lossy compression, some data may be discarded during conversion. However, if FLAC is lossless, your file will be preserved at full quality. Our converter uses the best available algorithms to minimize any quality difference.
Is it safe to convert files here?
ABSOLUTELY. Unlike other sites, we do NOT upload your files to a server. All processing happens locally on your device using advanced browser technologies. Your files never leave your computer.
Is this service really free?
Yes, 100% free. No hidden fees, no watermarks, and no registration required. We support ourselves through non-intrusive advertising.
When should I use AAC instead of FLAC?
AAC is best for: Apple Music and iTunes Store and YouTube audio. FLAC is better for: Audiophile music collections and Music archival and preservation. Choose whichever format best fits your workflow and compatibility requirements.
Can I convert AAC on mobile?
Yes! Our converter works on iPhones, iPads, and Android devices. All processing happens in your browser — no app download needed.
Privacy Guarantee
Your files are yours. We do not store, view, or claim ownership of any content you convert. Processing is done entirely in your browser.