The Regex Tester lets you write and test regular expressions against any test string. Matches are highlighted in real time and capture groups are displayed for inspection.
An essential tool for developers working with text parsing, validation, search-and-replace, or any regex-based processing.
JavaScript regex syntax is used, which supports most common features including lookahead, lookbehind, and named groups.
Global (g), case-insensitive (i), and multiline (m) flags can be toggled.
Each match is highlighted in the test string with alternating colors. Overlapping matches are shown clearly.
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