A PAC processor app, also known as a PAC file editor, is a software application that enables users to edit PAC files. PAC files are used to specify the proxy server settings for web browsers and other applications that use web proxies.
PAC files contain a series of rules that determine which proxy server should be used for which website or URL. The rules are based on the hostname or IP address of the website or URL being accessed. When a user attempts to access a website, the web browser first checks to see if there is a PAC file configured. If there is, the browser then processes the PAC file and uses the specified proxy server for all subsequent requests to that website.
PAC processors enable users to easily edit PAC files so that they can change or add new proxy server rules as needed. This can be useful when trying to access websites that are blocked by your current proxy server settings, or when you want to switch to using a different proxy server altogether.
There are many different PAC processor apps available, both free and paid. Some popular examples include Proxy SwitchyOmega and Gas Mask.