Free website and security tools
13 tools in four areas, all free and without sign-up. We store neither the addresses you check nor the results.
Security & privacy
Encryption, security headers and which third-party services your site loads.
- SSL CheckerPopularHow long is my SSL certificate still valid?Expiry date, issuer and whether browsers trust the certificate.
- Security Headers CheckPopularHow well is my website protected against common attacks?A grade from A to F for HSTS, CSP and other security headers.
- Tracker CheckPopularDoes my website load Google Fonts, Analytics or other trackers?Finds embedded third-party services, cookies and cookie banners.
Domain & email
DNS records, email spoofing protection and the expiry date of your domain.
- DNS LookupWhere does my domain point?All important DNS records: A, AAAA, MX, NS, TXT, CNAME and CAA.
- Email Security CheckPopularIs my email domain protected against spoofing?Checks SPF, DKIM and DMARC and explains what is missing.
- Whois LookupPopularWho owns a domain and where is it registered?Registrar, name servers, status and dates straight from the registry’s Whois server, including ccTLDs like .de and .at.
- Domain Expiry CheckWhen does my domain expire?Expiry date, registrar and status from the official registry lookup.
Passwords & data
Check and generate passwords, verify that files are genuine.
- Password CheckerPopularHas my password appeared in a data breach?Check its strength and compare it with hundreds of millions of leaked passwords without sending it anywhere.
- Password GeneratorHow do I quickly get a strong password?Generate random passwords right in your browser.
- SHA-256 ChecksumIs my downloaded file genuine and unchanged?SHA-256 and other checksums for text and files, right in your browser.