XSS Fuzzer is a simple application written in plain HTML/JavaScript/CSS which generates XSS payloads based on user-defined vectors using multiple placeholders which are replaced with fuzzing lists. It offers the possibility to just generate the payloads as plain-text or to execute them inside an iframe. Inside iframes, it is possible to send GET or POST requests from the browser to arbitrary URLs using generated payloads.
You can download it from the following link: https://packetstormsecurity.com/files/download/150491/XSSFuzzer-master.zip
Source: https://packetstormsecurity.com/files/150491/XSS-Fuzzer.html