M4A to OPUS Converter
Convert M4A audio to OPUS for free. Choose the bitrate, sample rate and channels, or trim your audio.
or drop files here
Up to 1 GB per file · Files never leave your device
- 100% free
- No sign-up
- No upload — private
- No watermark
How to convert M4A to OPUS
Add your M4A files
Click “Choose Files” or drag and drop your M4A audios onto this page.
OPUS is selected
The output is already set to OPUS. Open Advanced settings if you want to change the bitrate or trim the audio.
Convert and download
Click Convert. Your OPUS file is ready in moments — nothing is uploaded.
About the formats
MPEG-4 Audio
M4A is AAC audio in an MP4 container. It sounds better than MP3 at the same size and is the default on Apple devices.
Opus Audio
Opus is a modern open audio codec with excellent quality at low bitrates. WhatsApp, Discord and WebRTC use it for voice.
Frequently asked questions
How do I convert M4A to OPUS?
Click “Choose Files” and select your M4A file (or drag it onto the page). OPUS is already selected as the output, so just click Convert and download your OPUS file when it’s ready.
Which bitrate should I choose?
“Automatic” gives great quality for most music. Use 256–320 kbps for the best sound, or 96–128 kbps for voice recordings and podcasts.
Is it safe to convert M4A files here?
Yes. Conversion runs inside your own web browser, so your files are never uploaded to our servers or anyone else’s. Nobody can see them, and nothing is stored after you close the tab.
Is the M4A to OPUS converter free?
Yes, it’s completely free. There’s no sign-up, no watermark and no limit on how many files you convert. Each file can be up to 1 GB.
Can I convert several M4A files at once?
Yes. Add as many M4A files as you like and convert them in one go, then download them one by one or together as a ZIP file.