PregexEval is a tiny and a simple regex evaluator. You type your regex, type a string to match and, for every characters entered you'll see if it matches and also see a full description of the matching. It's a NFA-based matching as in Perl 5.
Search words in text files, display matching lines in tabs. Options to save results, exclude words, display the line numbers. Tiny file for searching big text files. Please leave feedback to help improve the application. Documentation coming soon.