Regex Tester

About this tool

Test JavaScript-flavored regular expressions in real-time. Matches are highlighted in the test string and listed with their positions and capture groups.

Flags

• g (global) — Find all matches, not just the first
• i (insensitive) — Case-insensitive matching
• m (multiline) — ^ and $ match line starts/ends
• s (dotall) — . matches newline characters
• u (unicode) — Full Unicode support

Common patterns

• \d — digit, \w — word character, \s — whitespace
• [abc] — character class, [^abc] — negated class
• (group) — capturing group, (?:group) — non-capturing
• a4 — 2 to 4 repetitions, a+? — lazy quantifier