LIHA Tools

AAC / M4A to FLAC Converter

Convert AAC / M4A audio to FLAC in a browser-only batch. Files and results are never uploaded.

Files stay in this browser tab and are never uploaded. Up to 250.0 MiB per file and 50 files.

Common output settings

Advanced settings

The batch workspace is ready. Audio encoding becomes available after the verified browser engine is loaded.

How AAC / M4A to FLAC conversion works

AAC / M4A decode → normalized audio stream → FLAC encode

Reading AAC / M4A

AAC or M4A input is demuxed from its supported transport or MP4 container with compatible tags.

Creating FLAC

FLAC output preserves audio samples losslessly while reducing size compared with uncompressed PCM.