What this tool does
Parses X.509 certificates and surfaces subject, issuer, validity, SANs, and signature algorithm details.
This page focuses on practical, step‑by‑step usage for **SSL Certificate Analyzer**, with clear examples and common pitfalls.
When you should use it
Use it to debug certificate chain problems, hostname mismatches, or expiry alerts.
How to use
- Paste a PEM certificate.
- Review dates, SAN entries, and algorithm.
- Cross-check hostnames and expiration windows.
Quick example
Example: Confirm that the SAN list contains your domain and that the cert isn’t expired.
Notes
Always validate certificates using a full chain in production—single-cert checks are partial.
SSL Certificate Analyzer
Comprehensive SSL/TLS certificate analysis with security validation and expiry monitoring
Complete SSL Certificate Analysis:
Check issue date, expiry date, and remaining validity period
Certificate authority, organization details, and issuer chain
Domain owner, organization, location, and contact information
Encryption algorithms, key strength, and protocol support
Complete certificate hierarchy and trust chain validation
Common SSL vulnerabilities and security misconfigurations
Subject Alternative Names (SAN) and multi-domain coverage
OCSP stapling, certificate transparency, and optimization
Analyze SSL Certificate
Enter any domain name to analyze its SSL/TLS certificate configuration
Batch Certificate Analysis
Upload a text file with multiple domains (one per line) for batch analysis
Drop your domains file here or click to browse
Supports .txt files with one domain per line (max 1MB)
Privacy & Security
We do NOT store or log any domain names or certificate data. All analysis happens in real-time.
Certificate analysis uses secure TLS connections and follows privacy best practices.
We do not track your analysis requests or collect personal information.
All certificate data is fetched directly from the target domains in real-time.
Certificate Security Best Practices
Set up expiry monitoring for critical domains to avoid service disruption.
Use certificates with at least 2048-bit RSA or 256-bit ECC keys.
Ensure proper certificate chain configuration to avoid trust issues.
SSL Certificate Reference Guide
FAQ
Is SSL Certificate Analyzer encryption?
No. It is primarily an analysis/encoding utility. If you need confidentiality, use a real encryption scheme and manage keys properly.
Why does the certificate validate in one place but fail elsewhere?
Most often it’s a chain issue (missing intermediate), hostname mismatch (SAN), or time/expiry problems. Compare the full chain and SAN entries.
Is it safe to paste sensitive data here?
For best security, avoid pasting real secrets (private keys, live tokens, seed phrases). Use test data or work offline, especially for anything that could grant access or move funds.