Regex Tester
Test regular expressions with live matching, highlights, and group extraction.
Documentation
Regex testing validates your regular expression against test strings in real-time, showing matches and extracted groups.
Validating email/phone patterns, debugging search-and-replace, learning regex, and building data extraction rules.
- 1) Enter your regex pattern (e.g.
^\d3-\d4$). - 2) Enter the test string to match against.
- 3) View highlighted matches and extracted groups.
FAQs
A regex tester lets you write and test regular expressions in real-time, showing matches and groups.
Regex is a pattern-matching language used for searching, validating, and extracting text.
Capture groups (parentheses) let you extract specific parts of a matched pattern.
No. All processing happens locally in your browser. Your patterns and text are never uploaded or stored.
Yes. The regex tester is completely free with no signup or limits.