How it works
Add your MP3 audio file. MimiFile checks the format, converts it to FLAC, and provides a temporary download when the result is ready.
Convert MP3 audio to FLAC when a library, player, editor or workflow expects a lossless-compressed FLAC file rather than an MP3 source.
MP3 → FLAC
Drag and drop, paste a file, or browse your device.
Files are temporary and deleted automatically.
Limits: 90 MB per file · 128 MB total per batch.
Add your MP3 audio file. MimiFile checks the format, converts it to FLAC, and provides a temporary download when the result is ready.
The FLAC output stores the decoded audio losslessly from that point forward, but converting a lossy MP3 cannot reconstruct information discarded by the original MP3 encoding.
Current source limit : 90 MB per file. Up to 10 files can be submitted in a batch, subject to the global batch ceiling.
No. MimiFile decodes the MP3 and encodes the resulting samples as FLAC. FLAC does not add another lossy compression step, but it cannot recover detail that was already removed when the MP3 was created.
The audio worker uses FFmpeg with the FLAC encoder and the default compression level 8 for a normal conversion. Compression level changes storage efficiency and encoding effort, not the missing information in the MP3 source.
A FLAC made from MP3 is often larger than the source without being higher fidelity than that source. The worker removes source metadata before writing MimiFile output metadata, so review tags when they matter.
The result is produced as FLAC (audio/flac). Features unsupported by the destination format cannot be preserved.
Use this when a service, device or workflow accepts FLAC but your source file is MP3 audio.
The downloaded file uses FLAC. Check the result if the source contains transparency, animation, embedded fonts, metadata or other format-specific features.