LIHA Tools

MP3 to AAC / M4A Converter

Convert MP3 audio to AAC / M4A 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 MP3 to AAC / M4A conversion works

MP3 decode → normalized audio stream → AAC / M4A encode

Reading MP3

MP3 input is decoded with compatible ID3 tags and artwork inspected before conversion.

Creating AAC / M4A

AAC / M4A output uses efficient lossy AAC audio in an M4A container with compatible metadata.