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    regex-pattern-validator

    by Timoranjes

    Expert regex architect for building, auditing, and optimizing high-performance, ReDoS-safe patterns.

    Updated Jun 2026
    Security scanned

    $5

    · or 25 credits

    30-day refund guarantee

    Secure checkout via Stripe

    Included in download

    • Identify and fix catastrophic backtracking in existing regex patterns.
    • Port complex Python regex patterns to Go-compatible syntax.
    • Includes example output and usage patterns
    • Instant install

    Sample input

    Create a regex pattern for a product code that starts with three lowercase letters, a hyphen, and four digits. Include named groups for id and val and check for ReDoS.

    Sample output

    Pattern: ^(?P[a-z]{3})-(?P\d{4})$ Rating: SAFE (No nested quantifiers) Compatibility: PCRE, Python, Go (Named group syntax differs in JS) Tests: | Input | Expected | Status | |---|---|---| | abc-1234 | Match | PASS | | ab-123 | No Match | PASS |

    About This Skill

    What it does

    The Regex Pattern Validator is a specialized skill for developing, testing, and auditing regular expressions across multiple programming languages. It goes beyond simple string matching by providing deep performance analysis, ReDoS (Regular Expression Denial of Service) protection, and engine-specific compatibility checks.

    Why use this skill

    Writing regex is easy; writing safe, performant, and cross-platform regex is hard. This skill prevents production outages caused by catastrophic backtracking and ensures your patterns work identically in JavaScript, Python, Go, Java, and PCRE. It automates the tedious process of generating comprehensive test tables for happy paths, boundary cases, and malicious inputs.

    Supported Engines & Tools

    • Flavors: Full support for PCRE, JavaScript (ES6+), Python (re/regex), Go (regexp), and Java patterns.
    • Security: Built-in auditing for ReDoS vulnerabilities like nested quantifiers and ambiguous alternations.
    • Codebase Integration: Can scan your entire repository to find and audit existing regex patterns for risks.
    • Library: Access to 30+ production-ready patterns for emails, URLs, semver, and more.

    Use Cases

    • Identify and fix catastrophic backtracking in existing regex patterns.
    • Port complex Python regex patterns to Go-compatible syntax.
    • Generate exhaustive test suites including edge cases and Unicode support.
    • Bulk audit a repository to find and document all regex occurrences.

    Reviews

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    Security Scanned

    Passed automated security review

    Permissions

    Allowed Hosts

    example.com

    File Scopes

    regex-pattern-validator/**

    Tags

    regex
    security
    validation
    python
    javascript
    devops

    Compatible with SKILL.md-compatible agents including Claude Code and Cursor.

    Creator

    Timoranjes

    Frequently Asked Questions

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