How can I redact passwords in a Charles Proxy trace

Question

I need to document an HTTP authentication issue with a Charles Proxy trace but I want to redact the passwords in the resulting trace file.

Hand-editing the binary .chls file produced by the "Save" menu command results in a corrupted file, so that is not an option.

Answer 1

Instead of saving the trace to a .chls file, export it with the "File > Export..." menu command to an "XML Session File".

You can then edit the resulting XML file before handing it off, and the recipient will be able to import it into Charles with the "File > Import..." command and view it.