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Regex Toolkit
10 browser-based regex utilities — test, replace, extract, explain, validate, highlight & more
Load Sample
Clear
Test & Match
Tester
Test & highlight
Replace
Find & replace
Extractor
Extract all matches
Highlighter
Colour-coded matches
Analyze
Explainer
Human-readable breakdown
Validator
Validate & inspect
Named Groups
Named capture groups
Build & Reference
Generator
Template patterns
Pattern Library
24 common patterns
Cheat Sheet
Quick reference
Regex Tester
Live match highlighting with capture groups
Test
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Test String
Paste
Copy
Matches
Enter a pattern above to begin
Regex Replace
Use $1, $2 … or $<name> in the replacement
Copy Result
Replace
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Replace with:
Input Text
Paste
Result
Diff will appear here after a replacement.
Regex Extractor
Extracts all matches into a table with capture groups
Extract
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Test String
Paste
Extracted Matches
Enter a pattern to extract matches
Regex Highlighter
Colour-codes each successive match in the text
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Test String
Paste
Highlighted Output
Matches will be highlighted here.
Regex Explainer
Breaks down every token in your pattern into plain English
Explain
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Enter a regex pattern to explain it
Regex Validator
Validates syntax and inspects the structure of any regex
Validate
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Test string (optional):
Enter a pattern to validate
Named Groups Viewer
Use (?<name>…) syntax in your pattern
Extract
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Test String
Paste
Named Group Results
Enter a pattern with named groups like (?<year>\d{4})
Regex Generator
Click any template to open it in the Tester
Pattern Library
24 production-ready patterns — click Test It to try any in the Tester
Regex Cheat Sheet
Quick reference for anchors, character classes, quantifiers, groups & flags
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