Hi! This is an online/webtool version of my freeware TrID file identifier. Should be usable from any PC with a browser & an internet connection. Check here: http://mark0.net/onlinetrid/trid.aspx Simply browse for the file to analyze, and click Upload. After some seconds/minutes for the uploading process, TrID will try to identify the file comparing it against a data base of more than 1.400 filetypes, and will show the results of his analysis as matches percentage. This is an example for an OpenOffice document: And this other for an MDI file: Also, creating new defs is generally very easy. It's just a matter of pointing the TrIDScan utility against a bunch of files (the more, the better) of a certain type. If you can create & submit some new defs, I will be more than glad to add it to the public list giving the proper mention & links to the author. Hope this can be useful for someone, Bye! P.S. Sorry for my English. I know it's not very good, so I always resort to some cut & paste from some sections of my website or posts I have made in other places. I hope to be understandable!