🛠 Developer tools by StrainWave — 170+ templates for $49

Regex Tester

Test regular expressions with real-time match highlighting

/ /
Enter a regex pattern above
TEST STRING
HIGHLIGHTED MATCHES

⚡ 170+ tools, templates, and components

Production-ready code. Zero dependencies. Dark mode. Lifetime access.

Get the Bundle — $49

What are Regular Expressions?

Regular expressions (regex) are patterns used to match character combinations in strings. They're essential for text parsing, validation, search-and-replace, and data extraction. This tester supports JavaScript regex syntax with all standard flags (g, i, m, s, u).

Common Regex Patterns

Email validation: [a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}. URL matching: https?://[\w\-]+(\.[\w\-]+)+[\w\-.,@?^=%&:/~+#]*. Phone numbers: \b\d{3}[-.]?\d{3}[-.]?\d{4}\b. Use the preset buttons above to quickly load these patterns.