TextCrawler is described by its author as
…TextCrawler enables you to instantly find and replace words and phrases across multiple files and folders..
TextCrawler is simple yet powerful. The first step in using it is choosing a filter for file extensions that are being searched, either from the choices presented or by typing one’s own. The second step is browse to the folder where the files are located. Note that the program’s options has a setting to scan or search subfolders as well. The next step is to type the text to find and the text to replace. TextCrawler supports regular expressions and the star icon beside the Find text area provides some examples for finding such things as dates or IP addresses. The program’s own help files explains regular expressions a bit further. An interesting feature is the ability to find the text being searched for first and then do the replacing after by clicking a separate button, this allows the user to preview all the instances of the found text before moving on. Also the Extract feature allows the user to copy all instances of the found text, this is useful for collecting information based on the search results.
The program also includes a Batch Commands tool to work with find and replace text pairs. Additionally the regular expression tester, which like the Batch Commands tool is located under the Tools menu, reduces the chances of making a mistake. TextCrawler runs under Windows 98, ME, 2000, XP and Vista.