Secure, Analyze &
Protect Free
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.
All 12 Security & Network Tools
Click any tool to start using it instantly. Password tools run in your browser — network tools query live data.
Password Generator
Generate strong, random passwords with customizable length, symbols, numbers and uppercase letters.
Password Strength Checker
Analyze password strength with entropy calculation, pattern detection and crack time estimation.
HTTP Header Checker
View any URL's HTTP response headers including security headers, caching and server info.
SSL Certificate Checker
Check SSL certificate expiry, issuer, chain and protocol for any domain. Verify HTTPS security.
DNS Lookup
Query A, AAAA, MX, TXT, NS and CNAME records for any domain. View DNS configuration instantly.
WHOIS Lookup
Look up domain registration details including registrar, creation date, expiry and nameservers.
What Is My IP
See your public IP address instantly. Shows IPv4, user agent and connection details.
.htaccess Redirect Generator
Generate Apache .htaccess redirect rules — 301, 302, regex patterns and domain redirects.
CSP Header Generator
Build Content-Security-Policy headers visually. Configure directives with presets and copy the header.
Website Speed Test
Test any website's loading speed — TTFB, total load time, page size and request count.
Open Port Checker
Check if a specific port is open on any host. Tests TCP connectivity with timeout detection.
User Agent Parser
Parse any user agent string to extract browser, OS, device type and engine details.
Why Security Testing Tools Are Essential
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.
Built For Every Security Task
Password Security
Generate cryptographically strong passwords and check existing ones for weaknesses. Our generator uses browser crypto APIs — no passwords ever touch a server.
Network Analysis
Look up domain WHOIS records, check DNS propagation, verify SSL certificates, and inspect HTTP response headers. Essential for debugging and security audits.
Content Security
Generate Content Security Policy headers to prevent XSS attacks. Create htaccess rules for redirects and access control. Lock down your web server configuration.
Website Monitoring
Look up IP addresses and geolocate servers. Check your website speed and response times. Verify your domain registration details are current.
SlapMyWeb vs Other Security Tools
Why pay for SecurityHeaders.com when we do it all for free?
How Our Security Tools Work
- 1
Pick a tool
Choose from password generators, network lookups, SSL checkers, header inspectors, and more.
- 2
Enter your target
Type a domain, URL, or IP address — or generate a password with your preferred settings. No signup needed.
- 3
Get instant results
See detailed analysis with clear pass/fail indicators, expiry dates, security grades, and actionable recommendations.
- 4
Fix & verify
Implement the suggested fixes and re-check. Use our CSP and htaccess generators to create the actual config code you need.
Security checks are just the start
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.
Run a free scanFrequently Asked Questions
Is the password generator actually secure?+
How accurate is the WHOIS lookup?+
What does the SSL Certificate Checker verify?+
What is a CSP header and why do I need one?+
Can I check DNS records for any domain?+
Do you store any of my lookup data?+
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