Test & Debug Regular Expressions Fast & Privately
Test regular expressions in real-time with match highlighting, capture groups breakdown, flag selectors, and string substitution tester.
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How to Use Regex Tester & Debugger
- 1
Enter Regex Pattern & Flags
Type your regular expression pattern and toggle flags (g, i, m, s, u) or select a preset.
- 2
Input Test String
Type or paste your test text to see instant match highlights and index locations.
- 3
Inspect Groups or Substitute
Inspect capture groups breakdown or test string replacement in the Substitution Tester.
Frequently Asked Questions
EarnovaRegex supports standard ECMAScript flags: global (g), case-insensitive (i), multiline (m), dotAll (s), and unicode (u) for comprehensive pattern debugging.
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