> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/ports-and-services/http-and-https-80-443/web-certificate-analysis-tools.md).
# Web Certificate Scanning Tools
TLS certificate inspection with openssl, sslyze, sslscan, and Nmap ssl-heartbleed checks.
### Openssl (inspect certificate):
```bash
openssl s_client -connect website.com:443
```
This command inspects a web server SSL certificate. It connects to the server on port 443 and displays details such as certificate validity, expiration date, and encryption type.
### Sslyze (SSL Security Scan):
sslyze website.com
### Sslscan (SSL Security Scan):
```bash
sslscan website.com
```
### Nmap (Vulnerable to Heartbleed):
1. Use the `ssl-heartbleed` Nmap script:
```bash
nmap --script ssl-heartbleed -p8443 127.0.0.1
```
---
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