SSL Certificate Checker

🔒 SSL 证书检查

检查 SSL/TLS 证书详情

检查配置

快速检查

SSL证书说明

证书状态

  • ✓ 有效 - 证书正常且未过期
  • ⚠ 即将过期 - 30天内过期
  • ✗ 已过期 - 证书已失效
  • ✗ 检查失败 - 无法获取证书

安全建议

  • 定期检查证书有效期
  • 提前30天更新证书
  • 使用2048位或更高密钥长度
  • 启用TLS 1.2或更高版本

注意事项

  • 本工具使用模拟数据进行演示，实际SSL检查需要后端支持
  • 检查结果仅供参考，实际证书状态可能有所不同
  • 某些域名可能使用了自签名证书
  • 建议使用专业的SSL监控服务

SSL Certificate Checker

Online SSL/TLS certificate checking tool

Runs locally · Nothing uploaded

Overview

Our online SSL certificate checker helps you quickly inspect your website's HTTPS configuration and SSL certificate status. By examining critical indicators like certificate validity, chain integrity, protocol versions, and cipher suites, it helps you identify potential security issues and ensure your HTTPS setup follows best practices.

Features

  • SSL certificate status check
  • Certificate validity lookup
  • Certificate chain verification
  • TLS protocol version check
  • Encryption cipher suite display
  • Certificate authority identification
  • HTTPS configuration security assessment

How It Works

  1. 1 Enter the domain name you want to check
  2. 2 The tool initiates a TLS handshake with the target server
  3. 3 It retrieves and parses the SSL certificate details
  4. 4 Certificate status, validity, protocol version, and cipher suite results are displayed

Tips

  • Set up certificate expiry reminders and begin the renewal process 30 days before expiration
  • Prefer TLS 1.2 or higher and disable TLS 1.0 and 1.1
  • Regularly verify certificate chain integrity to ensure certificates are issued by a trusted Certificate Authority

Related tools

Tags SSLTLSCertificateHTTPS

FAQ

What happens when an SSL certificate expires?

When an SSL certificate expires, browsers display security warnings to users, reducing trust. Search engines may also lower your site ranking, and API calls may fail. It is recommended to renew certificates 30 days before expiration.

Why should I check the TLS protocol version?

Older TLS versions (1.0 and 1.1) have known security vulnerabilities. Modern browsers have already deprecated support for these versions. Upgrading to TLS 1.2 or higher significantly improves website security.

Is the checking tool itself safe to use?

Yes. The inspection only reads publicly available SSL certificate information from the target server and does not involve any sensitive data. All checks are performed through standard TLS handshake protocols.

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