Regex Explainer
Understand any regular expression with plain English explanations. Paste a regex pattern to get a detailed breakdown of each component, making complex patterns easy to comprehend.
Try These Examples
Common Regex Tokens
^Start anchor$End anchor\dDigit\wWord char\sWhitespace.Any char*0+ times+1+ times?Optional{n,m}n to m times[abc]Char class()GroupFAQ
What does this tool explain?
The explainer breaks down regex patterns into individual tokens and provides human-readable descriptions. It explains character classes, quantifiers, anchors, groups, lookaheads, and all other regex constructs.
Can it explain complex patterns?
Yes, the tool can parse and explain even complex nested patterns with multiple groups, alternations, and assertions. Each component is explained in context to help you understand how the full pattern works together.
Does it support all regex flavors?
This tool focuses on JavaScript regex syntax, which covers most common patterns. While some advanced features from other flavors like PCRE may not be fully supported, the majority of standard regex constructs are explained.
How can this help me learn regex?
By seeing explanations of existing patterns, you can learn what each symbol and construct means. Try pasting regex patterns you find in code or documentation to understand how they work and build your regex knowledge.