Regex Tester
Pattern
//
Enter a pattern and test string aboveFlags:
Common patterns
Test string
1
- Enter a regular expression pattern in the Pattern field
- Toggle flags (g, i, m, s) as needed
- Type or paste your test string — matches are highlighted instantly
- Browse the Common Patterns library and click any pattern to load it
- Inspect each match's position and capture groups in the results table
Frequently Asked Questions
Is my data sent to a server?
No. All matching runs locally in your browser using the built-in JavaScript RegExp engine.
What regex flavour is supported?
JavaScript ECMAScript regex syntax, compatible with most modern languages for common patterns.
What do the flags mean?
g = find all matches (global), i = case-insensitive, m = ^ and $ match line boundaries, s = dot matches newline.
Related Tools
Unit Converter
Convert between different units of measurement including length, weight, temperature, area, volume, and speed.
Length Converter - Convert Meters, Feet, Inches & More
Convert between meters, feet, inches, kilometers, miles, and other length units instantly. Fast and accurate length conversion calculator.
Weight Converter - Convert Kilograms, Pounds & More
Convert between kilograms, pounds, grams, ounces, and other weight units instantly. Accurate weight conversion calculator.