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Regex Pattern Analyzer

Comprehensive regex pattern analyzer with explanation, testing, match extraction, and performance analysis capabilities.

Active Flags

/pattern/gi
Global (find all matches), Case insensitive

Quick Examples

Pattern Library

Quick Reference

\\d \\w \\s
Digit, word char, whitespace
* + ? {n,m}
Quantifiers (0+, 1+, 0-1, range)
^ $ \\b
Anchors (start, end, word boundary)
[] () |
Character class, group, alternation

Regular Expression Pattern

Syntax: regex

Output

Output will appear here

How It Works

Input Your Data

Paste, type, or upload your data directly into the regex pattern analyzer. All processing happens locally in your browser for complete privacy and security.

Configure Options

Customize the tool settings to match your specific needs. Real-time processing with instant validation and error detection.

Process Instantly

Click the process button or enable auto-processing for real-time results. Lightning-fast performance with immediate feedback and validation.

Export Results

Copy results to clipboard, download as files, or share with others. Multiple export formats available for maximum compatibility.

Frequently Asked Questions

What regex features and flags are supported?
Supports all JavaScript regex features including lookarounds, named groups, unicode flag, sticky flag, and all standard quantifiers, anchors, and character classes.
How does the pattern complexity analysis work?
Complexity is calculated based on the number and type of regex features used. Simple patterns use basic matching, while complex patterns use advanced features like lookarounds and nested quantifiers.
What performance issues does the tool detect?
Detects catastrophic backtracking, nested quantifiers, and other patterns that can cause exponential time complexity. Provides optimization suggestions for better performance.
Can I test patterns against multiple text samples?
Yes, enter multiple lines of text to test your pattern against different inputs. The tool will show all matches with their positions and captured groups.
How accurate is the regex explanation feature?
The explanation breaks down patterns into component parts with descriptions for each element. While comprehensive, complex patterns may require additional context for full understanding.

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