🔍 Regex Tester
Live match highlighting with capture groups and g/i/m/s flag toggles.
About Regex Tester
Regular expressions are incredibly powerful for text matching, searching, and data extraction — but they're also notoriously hard to write correctly without testing as you go. This tester lets you type a regex pattern and instantly see every match highlighted in your test string, with capture groups shown in different colors so you can verify each group captures exactly what you intended.
Toggle flags (global g, case-insensitive i, multiline m, dotAll s) with a single click and see results update immediately. Perfect for developers, data analysts, and anyone working with log parsing, input validation, or search patterns. Write your regex, paste sample data, and debug interactively — a much faster workflow than running code and checking output repeatedly.