Interactive Regular Expression Tester
Test regular expressions in real-time with match positions, capture groups, and flag controls (g, i, m, s).
Your files are processed in your browser and are not uploaded to our server.
//gi
Flags:
Presets:
Matches (2)Match Found
Match #1Index: 28
support@toolboxpro.com
Match #2Index: 54
sales@example.org
How to Use Interactive Regular Expression Tester
1
Enter Pattern
Type your regex pattern and select active flags.
2
Enter Test String
Input text to match against the pattern.
3
Inspect Matches
Review highlighted match indices and capture group extractions.
Key Features
Real-time live regex evaluation as you type
Flags: g (global), i (ignoreCase), m (multiline), s (dotAll)
Detailed match cards with start index and capture groups
Pre-built presets: Email, URL, IPv4, Date, and Hex Color
Frequently Asked Questions
Everything you need to know about this tool and data privacy.
Yes! It utilizes your browser's native JavaScript RegExp engine with zero network latency.
Related Tools
More tools in the same category you might find useful
developer
JSON FormatterPopular
Prettify, format, indent, and minify JSON data with instant syntax error detection.
Browser OnlyOpen Tool
developer
JSON Validator
Validate JSON syntax with detailed error pointers, character positions, and RFC 8259 compliance.
Browser OnlyOpen Tool
developer
Base64 EncoderPopular
Encode plain text or binary files into Base64 format with UTF-8 support.
Browser OnlyOpen Tool