Convert AAC to FLAC online, free
AAC vers sans perte — processed on our secure servers in France. Files deleted after conversion, no sign-up.
Drop your AAC file here
or click to choose a file — conversion to FLAC
AAC vs FLAC — technical comparison
Frequently asked questions
How to convert AAC to FLAC?+
Drop your AAC file in the zone above, or click to select it. The FLAC conversion starts automatically on our secure servers — no software to install.
Is converting AAC to FLAC secure?+
Yes. ConvertLab processes your files on secure servers located in France, over an encrypted connection. They are never shared with any third party and are deleted immediately after the conversion.
Is there quality loss when converting AAC to FLAC?+
No. FLAC is lossless: all data from your AAC file is preserved.
What is the maximum file size?+
Since the conversion runs on our servers, the limit no longer depends on your device. Files up to 100 MB are accepted. With NoLimit, up to 1 GB per file (250 MB for video).