$ ls /opt/security-tools/

Free browser-based cybersecurity tools for security analysis and testing. 100% client-side - no data is stored or transmitted.

Privacy First

All tools run 100% in your browser. No data is sent to any server, stored, or logged. Your inputs never leave your device.

$ cat headers_analyzers/

Security Headers Analyzer

A+ → F Grading

Analyze HTTP security headers and get a security grade with recommendations.

CSP Analyzer

Analyze Content-Security-Policy headers for weaknesses and unsafe directives.

HSTS Validator

Validate HSTS headers for max-age, includeSubDomains, and preload readiness.

$ cat encoding_hashing/

JWT Decoder

Decode JWT tokens and view header, payload claims without signature verification.

Hash Generator

MD5/SHA-1/SHA-256

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text input.

Base64 Encoder/Decoder

Encode and decode Base64 strings with UTF-8 support.

URL Encoder/Decoder

Escape/Unescape

Encode and decode URL special characters for safe URL handling.

Hash Identifier

Identify hash types based on length and format (MD5, SHA-1, SHA-256, etc.).

$ cat password_tools/

Password Strength Analyzer

Analyze password strength, entropy, and detect common patterns.

Entropy Analyzer

Bits of Entropy

Calculate entropy for passwords and keys with brute-force resistance estimates.

$ cat browser_privacy/

Browser Fingerprint Viewer

View your browser fingerprint data and understand privacy implications.

Cookie Flags Inspector

Analyze cookie flags (Secure, HttpOnly, SameSite) with security recommendations.

Storage Viewer

View localStorage and sessionStorage contents with data exposure warnings.

Educational & Defensive Use Only

These tools are provided for educational and defensive purposes only. Only test on systems you own or have explicit written permission to test. The author is not responsible for any misuse of these tools.