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Interactive Regex Tester

Write, test, and debug regular expressions in real-time.

Regular Expression

Test String0 Matches

Export Code

const regex = /[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/g;
const str = `Hello there!...`;

// Check if matches
const isValid = regex.test(str);

// Extract all matches
const matches = str.match(regex);
console.log(matches);

Quick Reference

.Any character except newline

\wAlphanumeric + underscore

\dAny digit (0-9)

\sWhitespace character

[A-Z]Character range

^Start of string

$End of string

*0 or more times

+1 or more times

?0 or 1 time

How to use Interactive Regex Tester & Visualizer

1Type your Regular Expression pattern into the top input field.
2Add any necessary flags (like 'g' for global or 'i' for case-insensitive) in the flags box.
3Type or paste your test strings into the main editor window.
4Watch the test string highlight your matches in real-time. Use the right sidebar to copy code snippets for your preferred language.