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Regex Tester and Debugger Online

This is a free regular expression tester and debugger with highlighting for match results. Quickly test and debug your regex now in real time.

Created by Commontools | Updated on: May 27, 2022

Pattern

Options:

g i m

String To Test

Matches (highlighted - hover for index)

Category

Programming

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Styles:

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MLA Style Citation

"Regex Tester and Debugger Online." Commontools.org, 2026. Mon. 20 Jul. 2026. <https://www.commontools.org/tool/regex-tester-and-debugger-online-11>.

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Chicago Style Citation

Commontools.org, 2026. "Regex Tester and Debugger Online." Accessed July 20, 2026. https://www.commontools.org/tool/regex-tester-and-debugger-online-11.

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APA Style Citation

Regex Tester and Debugger Online. (n.d.). Commontools.org, Retrieved July 20, 2026, from https://www.commontools.org/tool/regex-tester-and-debugger-online-11.

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