I had a more than 2-page JSON file that I wanted to use as a payload. For shorter JSON documents, pasting it in is usually not a problem but in this case it would be great if Postman supports files. Turns out it does!
In the Body
section, choose the form-data
radio button. Just before the value column, there is a drop-down list.
From it select File
.
The Select Files
button will appear.