Matches are highlighted here as you type. Capture groups are shown per match below.
| # | Matched text | Pos | Len | Groups |
|---|
^ start $ end \b word boundary
\d digit \w word \s whitespace [a-z] range [^abc] negated
* 0+ + 1+ ? 0-1 {n,m} n to m
(exp) capture (?:exp) non-capture \. literal dot \\ backslash
Write a regular expression, watch matches highlight in your text as you type, and inspect every capture group in the details table. Test, replace with $1-style backreferences, and copy matches as plain text or TSV for spreadsheets.
Flag buttons cover the common switches (i, g, m, s, u, y), and the presets drop in ready-made patterns for email, URLs, phone numbers and more.