Regular Expression

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Common Patterns

Test String

Matches0

Test Regular Expressions

Enter a regex pattern and text to test matching and replacement

Regex Tips

Use Non-Greedy Matching

Add ? after quantifiers (.*?) to match the shortest possible string instead of the longest.

Escape Special Characters

Characters like . * + ? [ ] ( ) | \ ^ $ have special meaning. Escape with \ if literal.

Test Incrementally

Build complex patterns step by step, testing each part before adding more complexity.

Use Named Groups

Use (?<name>pattern) for readable capture groups. Access with $<name> in replacements.

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