“I recently discovered a pretty amazing website called DiffChecker. It compares files and visually highlights any differences. You can use it to compare texts you paste right into the browser window, or you can upload documents to compare. It accepts Word docs, pdfs, spreadsheets and image files. To find the differences between two versions of a website, first you’ll have to convert them into txt files. Find an old capture in the Wayback Machine, right click to view page source, then save as a txt file. Then do the same for the live version of the site. A website’s html/css code may not include data files of course – those may be pulled from a background database you can’t access. I’m not saying it will work for every website, but it’s worth a try. The developers at DiffChecker are very responsive too, they quickly answer questions.” Via Marie Concannon Head, Government Information & Data Archives University of Missouri.