About FreeSSL
A free, open web security toolkit for developers, website owners, and everyone who believes HTTPS should be universal.
Our Mission
We believe every website on the internet deserves HTTPS — regardless of budget, technical expertise, or scale. FreeSSL was built to remove every barrier between you and a secure, trusted SSL certificate. We use Let's Encrypt — a free, open, and automated Certificate Authority operated by the nonprofit Internet Security Research Group (ISRG) — to issue every certificate we generate.
What We Offer
- Free SSL Generator — Standard and wildcard certificates via HTTP or DNS verification
- SSL Checker — Inspect certificate details, trust chain, and key information
- Expiration Checker — Know exactly when your certificate expires
- CSR Generator — Browser-local key pair generation; your private key never leaves your device
- DNS Lookup — Query live DNS records via Cloudflare DNS-over-HTTPS
- WHOIS/RDAP Lookup — Domain registration data from the modern RDAP protocol
- IP Lookup — Approximate geolocation and ISP data for any public IP
- HTTP Header Checker — Security header assessment for any public URL
- Password Generator — Cryptographically secure passwords generated entirely in your browser
Security Principles
Security is not a feature we add — it's the foundation everything else is built on.
Private Keys Stay Private
We never log, store, or transmit private keys. The CSR and password generators operate entirely in your browser.
SSRF Protection
All server-side network tools implement strict SSRF defenses. Private/internal IP ranges are always blocked.
Rate Limiting
Every API endpoint is protected with rate limiting to prevent abuse and protect the Let's Encrypt infrastructure.