AAC to FLAC Converter
Convert AAC files to FLAC in seconds, right in your browser. Drop in one file or a whole folder, pick your quality settings and download - nothing is uploaded to a server.
Drop AAC files here
MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, WMA, AMR, MP4, MOV & more · Processed on your device - nothing is uploaded
How to convert AAC to FLAC
- Click "Choose files" or drag your AAC files onto the page.
- Make sure "FLAC" is selected as the output format.
- Optionally click Edit to trim, adjust volume or add effects.
- Click Convert, then Download your FLAC files.
Why convert AAC to FLAC?
FLAC is lossless, so further editing and re-saving won't reduce quality any more. (It can't restore detail that AAC compression already removed.)
FLAC is best for hi-fi music collections, archiving CDs and lossless streaming. Supported by Android, iOS 11+, Windows 10+, macOS, most hi-fi players and browsers.
Will I lose quality?
Converting AAC to FLAC keeps all the quality that is in your AAC file - nothing more is lost. However, it cannot recover detail removed when the AAC was originally created, and the FLAC file will be larger.
AAC vs FLAC
| AAC | FLAC | |
|---|---|---|
| Full name | Advanced Audio Coding (ADTS) | Free Lossless Audio Codec |
| Type | lossy | lossless |
| Best for | streaming, broadcast and devices that need a raw AAC stream | hi-fi music collections, archiving CDs and lossless streaming |
| Typical size | ~1.4 MB at 192 kbps per minute | ~5-6 MB at 16-bit / 44.1 kHz per minute |
| Compatibility | Most phones, browsers, smart TVs and media players. | Supported by Android, iOS 11+, Windows 10+, macOS, most hi-fi players and browsers. |
| Developed by | MPEG (1997) | Xiph.Org Foundation (2001) |
AAC to FLAC: questions
How do I convert AAC to FLAC?
Open this page, add your AAC file, make sure FLAC is selected as the output format and click Convert. Your FLAC file is ready to download in seconds.
Will converting AAC to FLAC lose quality?
Converting AAC to FLAC keeps all the quality that is in your AAC file - nothing more is lost. However, it cannot recover detail removed when the AAC was originally created, and the FLAC file will be larger.
Is this AAC to FLAC converter free and safe?
Yes. It's free with no watermark or sign-up. Files are processed locally in your browser, so your audio is never uploaded or stored on our servers.
Can I convert many AAC files to FLAC at once?
Yes - add up to 5 files at a time on the free plan (unlimited with Pro), convert them all with one click and download them as a ZIP.
What is the difference between AAC and FLAC?
AAC (Advanced Audio Coding (ADTS)) is a compressed (lossy) format, raw AAC audio stream. The successor to MP3 used by YouTube, iPhone and digital radio. FLAC (Free Lossless Audio Codec) is a lossless format: lossless compression that shrinks audio to roughly 50-60% of WAV size without losing a single bit of quality.
Does it work on Mac, Windows, iPhone and Android?
Yes. The AAC to FLAC converter runs in any modern browser - Chrome, Safari, Edge or Firefox - on desktop and mobile. No software to install.