Certificate Depot

A free online tool for generating self-signed SSL/TLS certificates in seconds. No signup required.

Website: cert-depot.com

Features

• Generate self-signed certificates with RSA (2048/4096) or ECDSA (P-256/P-384) keys
• Download as ZIP (PEM key + certificate) or PFX (PKCS#12)
• Automatic SAN detection (DNS names and IP addresses)
• Stateless design -- certificates are generated in memory and streamed directly
• Rate limiting and input sanitization
• Single binary with embedded frontend (no external dependencies at runtime)

Tech Stack

• Backend: Go (standard library net/http + crypto/x509)
• Frontend: HTML + Tailwind CSS + vanilla JavaScript
• Only external dependency: go-pkcs12 for PFX output

Development

go mod tidy
go test ./...
go run .
# Visit http://localhost:8234

Build & Deploy

go build -o cert-depot .
# Binary is self-contained -- copy and run anywhere

License

MIT