How to convert AAC to FLAC
To convert AAC to FLAC, upload your AAC file, choose FLAC as the output format and press Convert. The finished FLAC file is ready to save to your phone or computer in seconds, free, with no watermark and no sign-up. Your file is deleted from our server about 30 minutes after the conversion.
This free online converter turns AAC audio files into FLAC in your browser, with no software to install and no watermark. The conversion runs on our server using ffmpeg, and the result is ready to save to your phone or computer in seconds. Your AAC file is deleted automatically about 30 minutes after the conversion.
Reasons to switch from AAC to FLAC
- Bit-perfect copy of the original
- About 40 to 60 percent smaller than WAV
- Supports tags and cover art
- Opens in: VLC, foobar2000, Android, Windows 10+, many hi-fi players and recent iOS
What to expect from this conversion
- AAC is lossy and FLAC is not, so the file gets much larger but cannot regain detail that AAC compression already removed.
- Tags such as title and artist are carried over where FLAC supports them.
AAC vs FLAC
| Property | AAC | FLAC |
|---|---|---|
| Full name | Advanced Audio Coding (ADTS stream) | Free Lossless Audio Codec |
| Released | 1997, MPEG (Fraunhofer, Dolby, Sony and others) | 2001, Xiph.Org Foundation |
| Family | Audio | Audio |
| Compression | Lossy | Lossless |
| Opens in | iPhone, Android, Windows, macOS, VLC and most hardware players | VLC, foobar2000, Android, Windows 10+, many hi-fi players and recent iOS |
| Best for | streaming and broadcast; radio and live audio | archiving a CD collection; audiophile listening |
Steps to convert AAC to FLAC
- Drop your AAC file onto the converter, or click to choose it.
- Check that FLAC is selected as the target format and adjust the options if you want.
- Press Convert, then save the new FLAC file to your device when it finishes.
Tips for the best result
- Choose High for music you care about and Small for voice recordings.
- Convert from the original lossless file when you have one.
Frequently asked questions
How do I convert AAC to FLAC?
Drop your AAC file on the converter, confirm that FLAC is the target format and press Convert. When it finishes, press Save to device or download the FLAC file. No account or software is needed.
Is the AAC to FLAC converter free?
Yes. It is free, with no watermark, no sign-up and no limit on how many files you convert. The site is supported by ads.
What should I know before converting AAC to FLAC?
AAC is lossy and FLAC is not, so the file gets much larger but cannot regain detail that AAC compression already removed. Tags such as title and artist are carried over where FLAC supports them.
Will the sound quality change when converting AAC to FLAC?
AAC is lossy and FLAC is not, so the file gets much larger but cannot regain detail that AAC compression already removed.
Which programs open FLAC files?
FLAC files open in VLC, foobar2000, Android, Windows 10+, many hi-fi players and recent iOS.
How large a file can I convert?
Up to 200 MB per file. Files are deleted from the server about 30 minutes after conversion, and no one looks at them.