How do I convert M4A to Opus?

Upload your M4A file using the box above, confirm Opus as the output format, then select Convert. The converted file is ready to download as soon as processing finishes — usually in a few seconds.

Is converting M4A to OPUS free?

Yes, and there is nothing to sign up for. Every conversion is free, there is no paid tier, and the limits are the same for everyone.

Will the quality change when converting to Opus?

OPUS uses lossy compression, so some data is discarded to keep the file small. The default quality setting is tuned to be visually or audibly transparent for most material, and you can raise it in the conversion settings.

What happens to my file afterwards?

The uploaded file is deleted as soon as the conversion completes, and the converted file is removed automatically once its retention window ends. Download links are signed and expire within minutes.

m4aopus

Convert M4A to Opus

Free online converter for M4A files. Low-latency codec with excellent quality at low bitrates. Nothing to install, no watermark, and every file is deleted automatically.

Drag and drop your files

Upload a M4A file to convert it to Opus. Up to 200 files at once, 10 GB each.

Free · up to 200 files · 10 GB each · files deleted automatically after 168 hours.

About M4A and OPUS

M4A

AAC audio in an MP4 container.

audio/mp4

Opus

Low-latency codec with excellent quality at low bitrates.

audio/opus

Other M4A conversions

m4a to mp3
m4a to wav
m4a to flac
m4a to ogg
m4a to aac

Other ways to get Opus

mp3 to opus
wav to opus
flac to opus
ogg to opus
aac to opus
mp4 to opus
webm to opus
mkv to opus