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Regex Tester
Online JavaScript regex tester with flags, match results, replace and common pattern templates
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# Regex Tester
Test JavaScript regular expressions online with flags, replacement and common pattern templates.
## Features
- ✅ i/g/m/s modifier checkboxes
- ✅ Real-time match count and detailed results (index/content/capture groups)
- ✅ Replace functionality
- ✅ Download match results
- ✅ 10 built-in common regex patterns
- ✅ User-friendly error messages for invalid expressions
## How to Use
1. Enter a regular expression and select modifiers
2. Paste your test text; matches appear in real time
3. Enter replacement text to see the replaced result
4. Click on common patterns to quickly fill in examples
## FAQ
### Which modifiers are supported?
This tool supports four common modifiers: i (case-insensitive), g (global match), m (multiline), and s (dot matches newline).