Regex Tester
Write regular expressions and test matches against sample text.
Regex Configurator
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About this tool
A regular expression (regex) is a sequence of characters that defines a search pattern. Regexes are used in programming for string validation, search and replace, parsing, and data extraction. This tester lets you write a pattern, optionally add flags (g, i, m, s), and see all matches highlighted in your test string in real time. Match details including groups are displayed below.