Regex Tester API

Category: developer

Test regular expressions with live matching, highlighting, and capture group display. Runs entirely in the browser.

Endpoint

N/A Browser API (RegExp)

No Server API

Response

Content-Type: N/A

This tool tests regex patterns in the browser using JavaScript's built-in RegExp. No server-side API is available.

// Browser-only: uses JavaScript RegExp

cURL Example

# No cURL equivalent — this tool runs in the browser

Code Samples

// Regex testing in JavaScript
const regex = /\b\w+@\w+\.\w+/g;
const text = 'Contact us at hello@example.com';
const matches = text.match(regex);
console.log(matches); // ['hello@example.com']

# Regex testing in Python:
import re

pattern = r'\b\w+@\w+\.\w+'
text = 'Contact us at hello@example.com'
matches = re.findall(pattern, text)
print(matches)  # ['hello@example.com']

// Regex testing in Java:
import java.util.regex.*;

Pattern pattern = Pattern.compile("\\b\\w+@\\w+\\.\\w+");
Matcher matcher = pattern.matcher("Contact hello@example.com");
while (matcher.find()) {
    System.out.println(matcher.group());
}

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