LIHA Tools

AAC / M4A to Opus Converter

Convert AAC / M4A audio to Opus 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 Opus conversion works

AAC / M4A decode → normalized audio stream → Opus encode

Reading AAC / M4A

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

Creating Opus

Opus output is efficient for speech and music and is stored in an Ogg container.