Regex Tester

Test regex patterns against sample text and review live matches. Use it to test matching rules for validation, search patterns, log parsing, cleanup scripts, and small text-processing tasks. Key capabilities on this page include live matching, flags support, match highlighting.

Prepare representative sample text, including cases that should match and cases that should not match.

Enter the pattern, choose flags, add sample text, run the test, then adjust the expression until matches and misses line up with the expected behavior.

Check edge cases such as empty strings, punctuation, repeated spaces, line breaks, and Unicode characters before copying a pattern into production.

This tool runs in your browser, so the input is processed locally on your device. Regex behavior can vary across languages and engines. This browser test is best for JavaScript-style regular expressions.

After using Regex Tester, nearby workflows include JSON Formatter, SQL Formatter, Slug Generator. These related pages help you continue the same job without searching through unrelated tools.