Regex Visualizer
// Visualize regex as a railroad diagram with explanations
//g
Enter a regex pattern above to see its railroad diagram and explanation.
#About Regex Visualizer
Free online regex visualizer. See your regular expression as a railroad diagram with an English explanation of each part, plus live match testing. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
#FAQ
What is a railroad diagram? ▾
A railroad diagram is a visual representation of a grammar or pattern. For regex, it shows the flow of matching as a diagram with paths for alternatives, loops for quantifiers, and labeled boxes for character classes and literals.
Does it support all regex features? ▾
The visualizer supports common regex features including literals, character classes, quantifiers, groups, alternation, and anchors. Some advanced features like backreferences have simplified representations.
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Copy this code to embed the tool on your website. Adjust the height to fit your layout.
<iframe src="https://www.browserutils.dev/embed/regex-visualizer" width="100%" height="500" frameborder="0" title="Regex Visualizer"></iframe>