M4A to OPUS
Convert M4A audio to OPUS in your browser. Everything runs on your device, so even large files never leave it.
From
M4A (.m4a)
To
OPUS (.opus)
Advanced options
- Conversion uses the audio and video codecs built into your browser, so results depend on your device. Unsupported targets are greyed out.
Drop M4A files here, or use the button below
Converted on your device — your files are never uploaded.
About these formats
- M4A — MPEG-4 Audio (AAC)
- Apple's AAC audio — better quality than MP3 at the same size.
- OPUS — Opus audio
- The most efficient modern codec — excellent quality at low bitrates.
- Conversion uses the audio and video codecs built into your browser, so results depend on your device. Unsupported targets are greyed out.
Other M4A conversions
Private by design — no upload, no sign-up
This M4A to OPUS converter runs locally, using your own browser. Your files are never uploaded to a server, so they stay on your device from start to finish.
- Are my M4A files uploaded to a server?
- No. The M4A to OPUS conversion runs locally in your browser using your own device's CPU. Your files are never uploaded, never transmitted over the network and never stored on a server.
- Is there a file size limit for M4A to OPUS?
- There is no imposed limit, because nothing is uploaded. The practical ceiling is your device's available memory, so very large files may be slower on older hardware.
- Does it work offline?
- Yes. Once the page has loaded, converting M4A to OPUS keeps working without a network connection, since the conversion happens entirely on your device.
- Do I need to sign up or install anything?
- No. There is no sign-up, no account and no software to install. Pick a M4A file and convert it to OPUS straight away.
- Is converting M4A to OPUS free?
- Yes, it is free to use, with no watermarks and no daily quota.