Regular Expression Tester

Options:

Global
Ignore Case
Multiple Lines

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Update While Typing
Truncate Long Strings
Execute
Explain
Replace

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Update Clear

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Help

Execution is performed using your browser's javascript's regex engine.

Explanation is done according to the Mozilla RegExp Reference. This obviously may not match the regular expression flavor that you are using.

Please let me know if you find a bug, or if I've missed something, or if you have an idea for something to add.