M4B to MKV Converter

Convert M4B to MKV online, for free.

Or drop files here. Max file size 1GB. Sign Up for more

How to Convert M4B to MKV?

  1. Click the “Choose Files” button to select your M4B files.
  2. Click the “Convert to MKV” button to start the conversion.
  3. When the status change to “Done” click the “Download MKV” button

Best Quality

We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).

Free & Secure

Our M4B to MKV Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically deleted after 2 hours.