Audio Conversion

Convert M4A to OPUS

Convert .m4a files to .opus format locally on your desktop. Fast, private, completely offline. Nothing leaves your machine.

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.m4a
Input
LOCAL
.opus
Output

How to convert M4A to OPUS

1

Open dotformat

Launch the app and drag your .m4a file into the window.

2

Select OPUS

Choose OPUS from the format picker. It'll be auto-suggested for audio files.

3

Done

Click convert and your .opus file is saved instantly.

About audio conversion

Lossless and lossy audio conversion. Preserve quality or optimize file size — your choice.

All audio conversions run entirely on your device. No files are uploaded. Your data stays private.

Key details

Input format: .m4a (M4A)

Output format: .opus (OPUS)

Category: Audio

Processing: 100% local

File size limit: None

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