Regex Tester
Test regular expressions with live match highlighting, group capture, and flag controls.
Runs entirely in your browser — nothing is uploaded or stored on any server.
About Regex Tester
Updated Jan 2025The Regex Tester provides a live environment for testing regular expressions. Matches are highlighted in the test string as you type. View all captured groups in a table, toggle flags (global, case-insensitive, multiline, dotall), and see match positions. An essential tool for building and debugging regex patterns.
Frequently Asked Questions
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