binary file in multipart form

Make sure the form-data is selected as the Media Types in the Request Body part. Then just click the “Browse” button and select a file with a QR code.

base64 encoded file in request body

Make sure the text/plain is selected as the Media Types in the Request Body part. Then just paste a base64 encoded image with a QR code in the text area.

file URL in query param

Just paste a link to an image with a QR code in the url text field in the Optional Parameters section.