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Regex Visualizer & Tester
Live highlight matches, inspect capture groups, test string replacements, and access curated regex presets locally in browser.
⚡ Curated Regex Cheat Sheet Presets:
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0 Matches
📊 Capture Groups Breakdown
| # | Full Match | Group Details | Indices |
|---|---|---|---|
| No matches | |||
Replacement results will appear here in real-time
3 Steps to Test Regex
Step 1:
Input Regex & Flags
Type your regular expression or load one from curated presets.
Step 2:
Inspect Matches & Groups
System highlights matches instantly and breaks down captured groups.
Step 3:
Test Replacements
Use
,
tokens to simulate text transformations.Frequently Asked Questions (FAQ)
Q: What are Capture Groups?
Parts enclosed in parentheses () create capture groups. You can extract matched substrings or reference them via
,
tokens in replace patterns.Q: What is greedy vs lazy matching?
Quantifiers like * and + match as many characters as possible by default. Adding a question mark (*?, +?) makes them lazy, matching the shortest match.