Regex Tester
Test and debug JavaScript regular expressions interactively. Enter your regex pattern, select flags (global g, case-insensitive i, multiline m), and view highlighted matches, index positions, and capture groups in real time.
Processed locally in your browser.
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About Regex Tester
Test and debug JavaScript regular expressions interactively. Enter your regex pattern, select flags (global g, case-insensitive i, multiline m), and view highlighted matches, index positions, and capture groups in real time.
Primary Purpose: Test regular expression patterns against sample text with live highlights
How to Use the Regex Tester
- 1Enter your Regular Expression pattern and select flags (g, i, m).
- 2Paste test string data in the test box.
- 3Matches and capture groups are highlighted live as you type.
Frequently Asked Questions
Which regular expression engine is used?
ToolPilot utilizes your browser native JavaScript RegExp engine, guaranteeing 100% compatibility with frontend and Node.js code.