Adobe provides tool for analysing Flash files
Adobe SWF Investigator lets users take a look at the inner workings of Flash files. Whether a security expert wants to look into a Flash exploit or a developer wants to debug their own project, the tool collection can be used, among other things, to decompile SWF files in order to then examine the ActionScript source code.
It includes an XSS fuzzer to check files for cross-site scripting vulnerabilities (XSS) and a HEX editor to modify those files. SWF Investigator, built in Adobe Air, was developed by Peleus Uhley, a member of Adobe's security team.