🔍 Regex Tester & Debugger
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Test String
Match Result
Match Details
Find & Replace
Regex Visualization
📖 Regex Cheat Sheet
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Free Online Regex Tester
Real-time matching, capture groups, find & replace, visualization, ReDoS detection. All in browser, private.
- Per-group color highlighting
- Match details with index/length/groups
- 20+ patterns including Chinese ID/phone
- Railroad diagram visualization
- ReDoS warning
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