Regex Tester

Test regular expressions against any text with live match highlighting.

Regex Pattern

Flags

Test String

How it works

Enter your regular expression pattern in the top field and your test string below. All matches are highlighted in real time as you type. Supports JavaScript regex flags (global, case-insensitive, multiline) and shows match groups separately.

Why use this tool?

Every developer needs a fast, reliable regex tester for validating email addresses, parsing log files, extracting data from strings, and writing form validation rules. No setup required — works instantly in the browser.

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