Regex Tester

Test regular expressions with live matching and highlighting

Regular Expression

//

Test String

Results (0 matches)

Hello World! This is a test string with 123 numbers.

Preset Patterns

Match Details

No matches found

Free Online Regex Tester & Pattern Validator

Test and validate regular expressions with our comprehensive regex tester. Features real-time matching, detailed match information, common pattern presets, and full flag support. Perfect for developers, data analysts, and anyone working with pattern matching.

Key Features:

  • • Real-time regex testing
  • • All regex flags support
  • • Match details with positions
  • • Common pattern presets
  • • Capture group analysis

Use Cases:

  • • Form validation patterns
  • • Data extraction tasks
  • • Text processing scripts
  • • Log file analysis
  • • Search and replace operations

How to Use the Regex Tester

1

Enter Pattern: Type your regular expression pattern in the regex input field.

2

Add Test Text: Enter the text you want to test the regex pattern against.

3

Set Flags: Enable the appropriate regex flags (global, case-insensitive, etc.).

4

View Results: See matches highlighted in the text and detailed match information.

Regex Flags Explained

Global (g): Find all matches in the text, not just the first one

Ignore Case (i): Make the pattern case-insensitive

Multiline (m): ^ and $ match line starts/ends, not just string start/end

Dot All (s): Make . match newline characters as well

Unicode (u): Enable full Unicode support for the pattern

Sticky (y): Match only from the lastIndex position

Common Regex Patterns

🔤 Text Patterns

  • • Words: \b\w+\b
  • • Digits: \d+
  • • Whitespace: \s+
  • • Any character: .

📧 Validation Patterns

  • • Email: [\w.-]+@[\w.-]+\.\w+
  • • Phone: \(\d3\)\s?\d3-\d4
  • • URL: https?://[\w.-]+
  • • IP: \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}

Why Use Our Regex Tester?

⚡ Real-Time Testing

Instant pattern matching as you type. See results immediately without manual testing.

📊 Detailed Analysis

Get match positions, capture groups, and comprehensive pattern analysis.

🎯 Pattern Presets

Quick access to common regex patterns for emails, URLs, phones, and more.

🔧 Full Flag Support

Test with all regex flags including global, multiline, and Unicode support.