12 professional security and network tools that run in your browser. Generate passwords, check SSL certs, look up WHOIS records, inspect headers — all free, all private. No signup, no limits.
Click any tool to start using it instantly. Password tools run in your browser — network tools query live data.
Generate strong, random passwords with customizable length, symbols, numbers and uppercase letters.
Analyze password strength with entropy calculation, pattern detection and crack time estimation.
View any URL's HTTP response headers including security headers, caching and server info.
Check SSL certificate expiry, issuer, chain and protocol for any domain. Verify HTTPS security.
Query A, AAAA, MX, TXT, NS and CNAME records for any domain. View DNS configuration instantly.
Look up domain registration details including registrar, creation date, expiry and nameservers.
See your public IP address instantly. Shows IPv4, user agent and connection details.
Generate Apache .htaccess redirect rules — 301, 302, regex patterns and domain redirects.
Build Content-Security-Policy headers visually. Configure directives with presets and copy the header.
Test any website's loading speed — TTFB, total load time, page size and request count.
Check if a specific port is open on any host. Tests TCP connectivity with timeout detection.
Parse any user agent string to extract browser, OS, device type and engine details.
81% of data breachesinvolve weak or stolen passwords. Yet most people still use "password123" or reuse the same password across sites. Our Password Generator creates cryptographically random passwords using your browser's built-in crypto API — no server involved, no password ever transmitted.
SSL certificates expire, DNS records get misconfigured, and HTTP headers leak information. The SSL Certificate Checker catches expiring certs before they break your site, while the HTTP Header Checker reveals missing security headers that leave you vulnerable to XSS and clickjacking.
For developers, our CSP Header Generator builds Content Security Policy headers that prevent cross-site scripting attacks — the #1 web vulnerability. And the DNS Lookup tool helps debug email deliverability issues, domain verification, and DNS propagation.
Google now uses HTTPS as a ranking signal, and browsers mark non-HTTPS sites as "Not Secure." Regular security testing isn't optional — it's a business necessity. Our tools make it free and instant.
Generate cryptographically strong passwords and check existing ones for weaknesses. Our generator uses browser crypto APIs — no passwords ever touch a server.
Look up domain WHOIS records, check DNS propagation, verify SSL certificates, and inspect HTTP response headers. Essential for debugging and security audits.
Generate Content Security Policy headers to prevent XSS attacks. Create htaccess rules for redirects and access control. Lock down your web server configuration.
Look up IP addresses and geolocate servers. Check your website speed and response times. Verify your domain registration details are current.
Why pay for SecurityHeaders.com when we do it all for free?
Choose from password generators, network lookups, SSL checkers, header inspectors, and more.
Type a domain, URL, or IP address — or generate a password with your preferred settings. No signup needed.
See detailed analysis with clear pass/fail indicators, expiry dates, security grades, and actionable recommendations.
Implement the suggested fixes and re-check. Use our CSP and htaccess generators to create the actual config code you need.
These tools fix one thing each. Our AI scanner checks 240+ SEO signals across 10 pillars — security, performance, content, links, schema and more — in 30 seconds.
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