FormatFuse

FormatFuse lets you fill out official PDF forms online without printing or installing software: load a form like a W-9, W-4, I-9 or 1099-NEC, type directly into the fields, sign it, and download the finished file, with the work happening privately in your browser.

It targets freelancers, small businesses and individuals who regularly need to complete official tax and HR forms and want a fast, free, no-account way to do it cleanly.