DeepTrawl is intended for website maintenance as it can detect various types of errors. In this regard, the emphasis is placed on avoiding broken links. However, it can also find other types of problems, like spelling mistakes and heavy images. It is good to hear that it checks all the texts even when the words are hidden in titles and meta tags.
Using the tool is extremely simple. You just need to enter the URL of the intended site and start the trawl. Then, after some time, which depends on the size of your site and your connection speed, you will get the results. Good news is that they are conveniently grouped by the names of the pages in which the errors were found; then, you can simply click on the name and get the full list of issues there. Fortunately, you can export the results to external files in HTML, CSV and DTX formats.
In addition to the basic functions, DeepTrawl can also search a whole site for a given string, using standard Boolean conditions, which comes in very handy when updating your site with new information. Besides, you can set levels of tolerance to errors. This way, some less important problems will not appear in the results. DeepTrawl also comes with a built-in HTML editor that highlights errors. Besides, the app can be scheduled to perform trawls at given intervals.
All in all, DeepTrawl is certainly a tool recommended for such conditions as very large or frequently updated websites. It is also useful to keep external links working and validate your site against HTML5, CSS3 and other standards. Good to hear that the tool is now free, although you will get no support under such conditions.