M4A to Opus
Change M4A to Opus and keep the quality you need. Free for up to 10 files a day, no sign-up.
M4A
Your files
Drop your .m4a files here
or
You can add several files and convert them together.
How to convert M4A to Opus
- Drop your M4A file into the box above, or add it from a link.
- Opus is already selected. Use the settings button next to it to change size, quality or other options.
- Select Convert, then download your Opus file.
To do this from your own code, call the FileForge API with "output_format": "opus".
About the formats
.m4a
M4A is audio stored in an MP4 container, usually AAC. It's what iPhone voice memos, iTunes purchases and many recorders produce.
.opus
Opus is a modern audio codec used by WhatsApp voice notes, Discord and WebRTC calls. It sounds great at low bitrates but many players and editors don't recognise .opus files.