Symantec Web Security Service (WSS) PAC File Management (PFMS) provides an online PAC file editor. The editor uses syntax highlighting and shows errors/warnings when the PAC file is not properly formatted.
Viewing a PAC file in the PFMS editor
Note: The PFMS PAC file editor will not block users from importing or saving an improperly formatted PAC file. Make sure all syntax errors are resolved before saving a PFMS PAC file for use with WSS.