Convert OPUS to M4A right in your browser
Free and unlimited, and nothing is uploaded: it all runs in your own browser. Open Audio Converter
What changes when you convert OPUS to M4A
- Both formats are lossy. Re-encoding adds a second generation of loss, so keep quality high (80+) unless size matters more than fidelity.
- M4A audio encoding exposes a quality control; around 80 is the usual sweet spot.
How to convert OPUS to M4A
- Add your OPUS file — drag it onto the page or choose it. It stays on your device.
- Pick M4A as the output format and set the quality slider.
- Press convert and download the result — individually or as one ZIP.
Questions
How do I convert OPUS to M4A for free?
Add your OPUS file on this site, choose M4A, and press convert. The whole conversion runs in your own browser — nothing is uploaded — and the M4A file downloads straight from your device.
Will converting OPUS to M4A lose quality?
Both formats are lossy. Re-encoding adds a second generation of loss, so keep quality high (80+) unless size matters more than fidelity.
Does M4A keep everything OPUS supports?
Yes within the format’s own limits — pixels, timing and structure survive the conversion.