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Regex Tester
Test regular expression patterns with common flags and view matches highlighted in real time.
ToolDost 2026
Regex tester sample text.
Matches found: 6
Why Use Our Regex Tester?
Regex is powerful but error-prone. This tester lets you quickly verify patterns, tune flags, and inspect highlights before implementing validation in production code.
Key Features
Instant Output
Get immediate results for formatting, conversions, and validations directly in the browser.
Private by Design
Your data stays local in your browser. No server upload is required for core operations.
How to Use the Regex Tester?
- 1.Enter Pattern: Add your regular expression and select the required flags (g, i, m).
- 2.Paste Test Text: Provide sample text, logs, or input strings you want to match.
- 3.Review Highlights: Check matched segments and match count, then refine your pattern.
Popular Regex Patterns
| Use Case | Regex Pattern | Notes |
|---|---|---|
| [A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,} | Basic email matching | |
| Number only | ^\d+$ | Validates digits only |
| Hex color | ^#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3})$ | Matches 3 or 6 hex chars |
Frequently Asked Questions
Benefits of Regex Testing Before Coding
- ✓Reduces validation bugs early in development.
- ✓Improves confidence in parsing and data extraction.
- ✓Speeds up debugging for text processing logic.
- ✓Helps document reusable validation patterns.
Related Tools
Test Your Regex Pattern
Try your expression above, refine flags, and copy a reliable pattern into your app.
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