Regex Tester
Evaluate JavaScript regular expressions with instant match breakdowns.
How to Use This Tool
- 1
Provide a JSON payload with pattern, optional flags, and text.
- 2
Example input: {"pattern": "https?://\\S+", "flags": "gi", "text": "Visit https://example.com"}
- 3
Click Convert to run the regex and inspect the structured output.
Features
Supports global, multiline, unicode, and dotAll flags
Reports match index and named groups
JSON output ready for sharing
Common Use Cases
- •
Debugging complex extraction patterns
- •
Teaching regex syntax with examples
- •
Validating input sanitizers before shipping
About This Tool
Stop guessing why your regex fails. Provide the pattern, flags, and sample text as JSON and get a detailed breakdown of all matches, indices, and named capture groups.
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Frequently Asked Questions
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