M4A → OPUS

Files stay on your device when the selected browser engine supports local processing.

Select files: M4A Audio

Drop files here or click to browse.

Processing takes place in your browser; the selected files are not uploaded.

Limited conversion Features that the target format cannot represent may be flattened, simplified or omitted.

About M4A to OPUS conversion

What this conversion does

M4A: An audio container that can hold AAC or ALAC; the extension alone does not identify the codec. OPUS: Audio coding designed for speech and music at varied bitrates.

When to use OPUS

  • When an app, device or website requires OPUS instead of M4A.
  • When OPUS is a better fit for your editing, sharing or storage workflow.

What to know

  • Processing takes place in your browser; the selected files are not uploaded.
  • Features that the target format cannot represent may be flattened, simplified or omitted.
  • Encoding depends on browser support. Metadata may be omitted.
  • Encoding depends on browser support. The output may use an Ogg container.
  • Compare the exported sound with the original. A larger bitrate cannot restore detail already lost, and codec availability depends on the browser.