Regex Tester
Test and debug regular expression patterns in real-time. View highlighted matches, capture groups, and match counts with support for global, case-insensitive, and multiline flags.
Regex Tester
Test regular expression patterns in real-time with highlighted matches
Matches
Capture Groups & Details
Regex Quick Reference
. Any char\d Digit [0-9]\w Word char\s Whitespace* 0 or more+ 1 or more? 0 or 1{n} Exactly n^ Start$ End[abc] Set(x) GroupAbout Regular Expressions
Regular expressions (regex) are patterns used to match character combinations in strings. They're a powerful tool for text processing, validation, search and replace, and data extraction in virtually every programming language.
Validation
Validate emails, phone numbers, SSNs, and custom formats
Extraction
Extract specific patterns from text using capture groups
Search & Replace
Find and replace text using regex patterns in editors and scripts
Free online Regex Tester. Test regular expression patterns instantly with real-time highlighting, capture group display, and match counting. Supports global (g), case-insensitive (i), and multiline (m) flags. Includes a quick reference guide for common regex patterns. Perfect for developers, data analysts, and anyone working with text pattern matching.