How to intercept multipart/form data in fiddler and access a binary file which is a part of the request

I am trying to intercept requests send to a server from my mobile device. There is this post request which will upload payload to the server and the request has a file of type .pb, which i cant read in fiddler. Is there a way to get hold of the file ?

Solution

It's not clear what "i cant read in fiddler" means.

Use Fiddler's HexView request inspector to inspect the POST body. You can select the bytes of the file upload and choose Save bytes to save the file out to your desktop.