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Free Online Tools

93+
Free tools — no signup, no tracking
Link Tools 12 tools
Privacy 15 tools
Webmaster Tools 2 tools
Security 22 tools
🔒
SSL Certificate Check
Verify SSL certificate expiry and validity
📋
WHOIS Lookup
Domain registration info and ownership details
Port Scanner
Check open ports on any host or server
🔢
HTTP Status Checker
Check status codes for multiple URLs at once
🔧
HTTP Headers
Inspect HTTP response headers for any URL
🛡️
Security Headers
Check security headers grade (CSP, HSTS, X-Frame) for any website
🌍
CORS Checker
Test CORS headers for cross-origin API requests
🔑
Password Leak Checker
Check if your password has been in a data breach
🔐
Password Strength
Test password strength and check breach databases
🎲
Password Generator
Generate cryptographically random passwords
✉️
Disposable Email
Check if an email address is throwaway
🔎
Subdomain Finder
Discover all subdomains of any domain using CT logs
🔢
CIDR Calculator
Calculate subnet ranges, masks and usable hosts from CIDR notation
🌐
Website Down Checker
Check if a website is down for everyone or just you
🌐
DNS Record Checker
Lookup A, MX, TXT, CNAME, NS records with copy buttons
🌐
DNS Lookup
Look up A, MX, TXT, CNAME, NS and more records
🔑
Bcrypt Generator
Hash and verify passwords with bcrypt
📨
Email Header Analyzer
Trace email origin and check SPF/DKIM/DMARC
🗝️
RSA Key Generator
Generate RSA public/private key pairs in PEM
⚖️
GDPR Checker
Check website GDPR compliance signals
🤖
Robots.txt Checker
Validate robots.txt and test crawl rules
🏷️
Meta Tag Checker
Check meta title, OG tags, Twitter cards and live social preview
Dev Tools 15 tools
Generators 13 tools
AI Tools 7 tools
Torrent Tools 7 tools
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