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Regex Tester
Build, test and debug regular expressions in real time. Type a pattern, see every match highlight as you type, and inspect capture groups. Nothing is sent anywhere - it all runs locally.
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TEST STRING
Enter a pattern to see matches.
QUICK REFERENCE
. any character\d \w \s digit / word char / whitespace+ * one-or-more / zero-or-more{n,m} between n and m times(...) capture group| alternation (or)\b word boundary^ $ start / end (line with m flag)(?=...) (?<=...) look-ahead / look-behindWant to actually understand these? The free course takes you from literal characters to lookarounds, one interactive lesson at a time.