Tools for web development and operations: check HTTP response headers (including security headers), parse and analyze URLs, test password strength, look up your global IP address, and more. Useful for security audits, debugging, and network troubleshooting.
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Check password strength against length, character variety, sequences, and common passwords. WCAG-style scoring.
Parse any URL into its components: protocol, host, pathname, query parameters, and hash.
Inspect HTTP response headers for any URL. Check security headers, cache-control, content-type, and more.
Look up your current public IP address with city, region, country, ISP, and timezone information.
What makes a strong password — length requirements, character types, passphrase vs random password, password managers, and how to check your password strength. Includes a free password generator tool.
Without UTM parameters, your analytics just shows "Direct." Learn all five UTM parameters, build properly tagged campaign URLs, and find your results in GA4's Traffic Acquisition report — with real examples.
Understand percent-encoding from scratch. Learn which characters need encoding, the difference between encodeURI and encodeURIComponent, and how to handle encoded URLs in fetch and form submissions.
A clear explanation of cryptographic hashing. Covers MD5, SHA-1, SHA-256 and SHA-512 compared, why passwords are hashed not encrypted, and what hash collisions mean in practice.
Use the HTTP Headers Checker to verify that your site sends the right security headers — Strict-Transport-Security, X-Content-Type-Options, and Content-Security-Policy all show up at a glance. A quick way to spot missing security configuration.