Convert AAC to FLAC
Convert AAC to FLAC on your device. Choose your file, convert, and check the result before sharing.
Drop the aac file
Drag your AAC onto the page or click to browse. It is read locally, never sent anywhere.
Choose FLAC
FLAC is lossless, so there is no quality or bitrate menu. Click Convert to start processing in this tab.
Save the flac
The finished FLAC downloads straight back to your device. Nothing touched a server on the way.
Why convert here, not there
No upload, ever
Audio files are personal. AAC to FLAC here happens inside one browser tab, end to end.
Local conversion
Conversion runs locally after you click Convert. The first audio or video conversion may need to download the converter engine.
No account, no daily cap
No account or daily conversion quota. The per-file cap is 2 GB, and available device memory can impose a lower practical limit.
The two formats, briefly
| AAC | AAC is a lossy audio codec. This page writes a standalone AAC file using the selected bitrate. | |
|---|---|---|
| FLAC | FLAC uses lossless audio compression. Encoding decoded audio as FLAC does not restore detail already lost in a source recording. | |
When you need this
- Use FLAC when your player or archive needs losslessly compressed audio. Converting AAC to FLAC cannot recover detail missing from the source; compare output size rather than assuming it shrinks.
AAC vs FLAC: what changes
| AAC | FLAC | |
|---|---|---|
| Kind | Audio | Audio |
| Compression | Lossy AAC audio | Lossless audio compression |
| Typical size | Depends on the file and encoding settings. | Measure the exported file; it may be larger. |
| Opens on | Check the source in your app and browser. | Check the downloaded file in the receiving app. |
| Best for | Keep the original as your source. | FLAC workflows, subject to the limits below. |
Keep the original. Compare the exported file before sharing or replacing it.
Good to know
- FLAC uses lossless compression of decoded audio. There is no bitrate choice, and lossy source detail cannot be recovered.
- First use downloads the audio/video engine (about 30 MB). The input cap is 2 GB, but available browser memory can run out below that.