BApp details: Payload Parser
This extension lets you configure a set of characters that an application is known to sanitize, and generate lists of payloads that exclude all characters or include at least one.
You can save the generated payload lists for use in functionality like Burp Intruder.
You can install BApps directly within Burp, via the BApp Store feature in the Burp Extender tool. You can also download them from here, for offline installation into Burp.
Please note that extensions are written by third party users of Burp, and PortSwigger Web Security makes no warranty about their quality or usefulness for any particular purpose.