Anyfile is in beta, so a few things may not work perfectly yet. Tell us what you find
Free converter
Anyfile converts an Opus audio to an M4A audio for free, right in your browser: the file is never uploaded.
Files are converted in your browser and never uploaded. By using Anyfile you agree to the Terms of Use.
| Sound quality | No further loss (what OPUS already left out doesn’t come back) |
|---|---|
| Tags and cover art | Title, artist, album and cover carried over where M4A holds them; lyrics and some rarer tags aren’t yet |
| File size | Usually larger: M4A compresses less tightly than OPUS |
When to use M4A: Music on Apple devices, iPhone voice memos and ringtone sources.
.opus
A royalty-free codec standardised by the IETF in 2012 (RFC 6716), usually stored in an Ogg container. It handles both speech and music well at very low bit rates.
Voice calls, voice notes and streaming, where low delay and small size matter.
Opens in Chrome, Firefox, Edge, VLC, Audacity
About OPUS files.m4a
An MPEG-4 file that holds only audio, usually AAC and sometimes Apple Lossless (ALAC). Apple popularised it for songs bought and ripped in iTunes.
Music on Apple devices, iPhone voice memos and ringtone sources.
Opens in Music, QuickTime, iPhone, Windows Media Player, VLC
About M4A filesGoing the other way? Convert M4A to OPUS
Everything that converts to M4A
Need to change it first? Open the audio editor
Drop your OPUS file on this page, or choose it. Anyfile converts it on your device in a moment and the M4A downloads straight away. To change it first, open it in the audio editor.
No. The file is read and converted by your own browser, and nothing is sent to a server. You can check: open your browser’s developer tools, go to Network, and convert a file. No upload appears.
M4A is a compressed format, and Anyfile saves at high quality, so the difference is very hard to notice.
Yes. Drop them together and you get one ZIP with every M4A inside.