If your regex matches, the debugger panel shows you the steps taken by the engine. It shows you capture groups, allows substitutions and provides a detailed explanation of each token. The match panel does a great job of colorizing the regex syntax. Regex101 supports PCRE, Javascript and Python. But regex101 is clean, it's easy to use, it has community features that RegexBuddy lacks, and, for many people, it may be the only regex tester they need. The features cannot possibly rival with RegexBuddy's depth. Recently, I have been impressed with regex101.Дon't get me wrong. New tools come out all the time, and old favorites often fail to keep up with the release of their supported engines' new versions. The coding world is awash with online regex testers.

As of April 2014, my favorite online regex tool by far is regex101. Since then, I wrote the huge RegexBuddy tutorial I always dreamed of (the most comprehensive RegexBuddy tut I'm aware of), which now lives on my dedicated RegexBuddy tutorial page.ДЄlthough RegexBuddy is my regex building tool of choice, some people do not want to invest in a standalone tool, do not run Windows, or prefer the community features of online tools. This page used to have a short intro to the tool. I can't do serious regular expressions work without it.

Regexbuddy is my absolute favorite regex tool. RegexBuddy: the Rolls-Royce of regex tools We'll be looking at three excellent tools. In the page on regex uses, we saw other tools that happen to use regular expressions-but those are not the focus of this page. By 'regex tools', I mean tools that either help you build your regular expressions, or where regex is at the core of the tool's function.

Expresso regex tool