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🔍Regex Tester
Test and validate regular expressions
Regex Pattern:
Flags:
Test String:
Output
Results will appear here
What is a Regex Tester?
A regex tester is a tool that helps you test and validate regular expressions (regex) against sample text. It highlights matches, shows groups, and helps debug regex patterns used in programming, data validation, and text processing.
Why Use Our Regex Tester?
- ✓Test regex patterns in real-time
- ✓Highlight matches in text
- ✓Show capture groups
- ✓Support for all regex flags
- ✓Perfect for debugging patterns
- ✓Free unlimited testing
- ✓No installation required
Features
•Enter regular expression pattern
•Add regex flags if needed (g, i, m)
•Enter or paste test string
•View matches highlighted in real-time
•Check capture groups and match details
How to Use the Regex Tester
- 1Enter your regular expression pattern
- 2Add regex flags if needed (g, i, m)
- 3Enter or paste test string
- 4View matches highlighted in real-time
- 5Check capture groups and match details
Frequently Asked Questions
What are regex flags?
Flags modify regex behavior: g (global), i (case-insensitive), m (multiline), s (dotall), u (unicode), y (sticky).
What are capture groups?
Capture groups (parentheses in regex) extract specific parts of matches for further use or reference.
How do I test multiline regex?
Use the "m" flag to enable multiline mode, which makes ^ and $ match line boundaries.
Can I save my regex patterns?
Currently, patterns are not saved. We recommend copying patterns you want to reuse.