SSLGen — SSL Certificate Generator
Generate, inspect, and verify SSL/TLS certificates from the command line. Powered by OpenSSL.
Commands
| Command | Description |
|---|---|
self-signed <domain> |
Generate a self-signed certificate + private key (RSA 2048, 365 days, with SANs) |
csr <domain> |
Generate a Certificate Signing Request + private key |
info <certfile> |
Show full certificate details (subject, issuer, SANs, fingerprint, algorithm) |
verify <certfile> |
Verify certificate validity and check expiration status |
chain <certfile> |
Display the certificate chain (splits PEM bundles) |
expiry <certfile> |
Check certificate expiry date with color-coded warnings |
Examples
# Generate a self-signed cert for local dev
sslgen self-signed myapp.local
# → Creates myapp.local.key + myapp.local.crt
# Generate a CSR for production
sslgen csr example.com
# → Creates example.com.key + example.com.csr
# Inspect a certificate
sslgen info /etc/ssl/certs/server.crt
# Check if cert is expiring soon
sslgen expiry server.crt
# Verify a certificate
sslgen verify server.crt
# View cert chain
sslgen chain fullchain.pem
Requirements
openssl— must be installed and in PATH
Output
self-signedandcsrcreate files in the current directory named<domain>.key,<domain>.crt, or<domain>.csr- All other commands output to stdout with color-coded status indicators
- Expiry warnings: green (90+ days), yellow (30-90 days), red (<30 days), expired