OPUS to M4A Converter (.opus to .m4a)

Convert IETF Opus Interactive Audio Codec (.opus) files to MPEG-4 Audio (Apple Voice Memos & iTunes) (.m4a) directly on your device. OPUS is commonly used for converting whatsapp/signal/discord `.opus` voice notes into `.mp3` or `.wav`, while M4A is ideal for converting iphone voice memos (`.m4a`) to `.mp3` or `.wav` for editing and sharing. Every conversion runs locally in your browser with zero server uploads.

100% On-Device Processing • Files Never Leave Your Browser (0 KB Uploaded)

Why Convert OPUS to M4A Locally?

Keep private chat voice recordings 100% on your own device. Unlike cloud converters that upload your .opus files to remote servers, Artoons processes your files directly on your device.

How to Convert OPUS to M4A

  1. Select or drag and drop your .opus (OPUS) file into the converter above.
  2. Confirm M4A (.m4a) as the target format and choose your preferred quality preset.
  3. Click Convert to automatically download your converted .m4a file.

Frequently Asked Questions

Do my OPUS files ever get uploaded anywhere?

Never — 100% of the conversion runs locally inside your own device memory with 0 KB sent over the network.

Will OPUS to M4A look or sound worse?

Both OPUS and M4A keep crisp detail when swapped locally on your own hardware. You can also tweak output quality in Preferences anytime.

How big of a .opus file can I convert here?

Right in this browser tab, you can convert .opus files up to 200 MB per file. Pushing bigger clips or giant folders? Grab the free Artoons Desktop App for unlimited sizes.

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