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Regex Tester & Debugger
Test and debug regular expressions with real-time match highlighting, groups, and flags support.
//
Valid Pattern — 2 matches found
Match Details
Match #1: "support@example.com" (Index: 14)
Group 1: "support"
Group 2: "example.com"
Match #2: "sales@toolifia.com" (Index: 37)
Group 1: "sales"
Group 2: "toolifia.com"
How to Use Regex Tester & Debugger
- 1
Enter your regex pattern in the pattern field.
- 2
Paste your test string below.
- 3
View matches highlighted in real time.
Key Features
- Real-time match highlighting
- Capture group display
- Flag toggles (i, g, m, s)
- Explanation breakdown
Benefits
- Debug complex regex patterns instantly
- Understand regex groups visually
- Test patterns against sample data
Common Pitfalls to Avoid
- • Forgetting to escape special characters like `.` and `*`.
- • Not setting global flag `g` for multiple matches.
Frequently Asked Questions
This tool uses JavaScript's built-in regex engine (ECMAScript standard).
Guides & Articles for Regex Tester & Debugger
View All Blogs →Technical Article
The Definitive Guide to Regex Tester & Debugger: Best Practices
Master Regex Tester & Debugger with step-by-step implementations and benchmarks.
Technical ArticleHow to Solve Regex Tester & Debugger Problems
Troubleshooting, edge cases, and automation methods for Regex Tester & Debugger.
Technical ArticleTop Real-World Use Cases for Regex Tester & Debugger
Explore production examples and workflows powered by Regex Tester & Debugger.
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