📝 Regex Pattern (with or without flags like /g, /i, /m):

📄 Test Text:

🎯 Match Results:

Found 3 match(es):
─────────────────────────────────
Match 1: "123-45-6789" (Position: 10-21)
Match 2: "987-65-4321" (Position: 33-44)
─────────────────────────────────
Total matches: 3
Flags used: /g

💡 Regex Tips: Use \d for digits, \w for word chars, [A-Z] for uppercase, (group) for capturing. Add flags: /g (global), /i (case-insensitive), /m (multiline)

📚 Common Regex Patterns:

• Email: ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$
• Phone (US): \b\d{3}[-.]?\d{3}[-.]?\d{4}\b
• Date (YYYY-MM-DD): \b\d{4}-\d{2}-\d{2}\b
• IP Address: \b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b
• URL: https?://[^\s]+
• Hexadecimal Color: #?[0-9A-Fa-f]{6}\b
• Username (3-16 chars): ^[a-zA-Z0-9_]{3,16}$

🔍

Regex Testing

Test your regular expressions against any text. See matches, positions, and match counts instantly.

📋

Copy Results

One-click copy all match results to clipboard for documentation or debugging.

🔄

Multiple Flags

Support for global (/g), case-insensitive (/i), multiline (/m), and dotall (/s) flags.

🛡️

Privacy First

All regex testing happens in your browser. Your patterns and data never leave your device.

📌 Free Online Regex Tester & Debugger Tool

Regex Tester is a powerful online tool to test, debug, and validate your regular expressions. Whether you're a developer, data analyst, or just learning regex, our tool helps you write and test patterns instantly with detailed match results.

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Instant Testing: Test your regex patterns against any text in real-time.
Match Details: See each match, its position, and total match count.
Flag Support: Works with global (/g), case-insensitive (/i), multiline (/m), and dotall (/s) flags.
Common Patterns Library: Built-in examples for emails, phones, dates, URLs, and more.
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📖 How to Test Regular Expressions

Enter Regex Pattern: Type your regex pattern (with optional flags like /g, /i).
Add Test Text: Paste or type the text you want to test against the pattern.
Click Test: Press the "Test Regex" button to find all matches.
Review Results: See each match, position, and total count.
Copy Results: Use "Copy Result" to save or share your findings.

💡 Common Regex Patterns & Examples

📧 Email Validation: ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$

📞 US Phone Number: \b\d{3}[-.]?\d{3}[-.]?\d{4}\b

📅 Date (YYYY-MM-DD): \b\d{4}-\d{2}-\d{2}\b

🌐 URL: https?://[^\s]+

🎨 Hex Color: #?[0-9A-Fa-f]{6}\b

🔢 Numbers Only: ^\d+$

🎯 Who Uses This Regex Tester?

Web Developers: Validate form inputs (email, phone, password).
Data Scientists: Extract patterns from text data.
DevOps Engineers: Parse logs and configuration files.
Students: Learn and practice regular expressions.
QA Engineers: Test text validation patterns.

🌟 Key Features at a Glance

✔️ Test any regex pattern with flags (/g, /i, /m, /s)
✔️ Detailed match results with positions
✔️ Built-in common pattern examples
✔️ Copy results to clipboard
✔️ Clear inputs with one click
✔️ Responsive design for all devices
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✔️ Privacy guaranteed (all client-side)

⭐ Pro Tip: Start with simple patterns and add flags gradually. Use \d for digits, \w for word characters, and . for any character. Test your regex before implementing in code!

🔍 Regex Tester & Debugger