GuardSSL - SSL Certificate Checker

About

🔒 GuardSSL - Your Website Security Guardian

  Instantly check SSL certificate information for any website you visit. Get comprehensive security analysis including validity period, issuer details, security grade, and expiration warnings - all in one click.

  ✨ KEY FEATURES

  • One-Click SSL CheckInstantly analyze the SSL certificate of your current website without leaving the page

  • Security Grade Rating
    Professional security scoring system (A+ to F) based on certificate quality, chain validation, cipher strength, and protocol version

  • Expiration Monitoring
    Clear visual indicators showing certificate validity and days remaining until expiration
    - Green: More than 30 days remaining
    - Yellow: Less than 30 days (expiring soon)
    - Red: Expired or invalid

  • Detailed Certificate Information
    - Certificate issuer and organization
    - Validity period (from/to dates)
    - Days remaining until expiration
    - Security analysis and recommendations

  • Multi-Language Support
    Available in English, Simplified Chinese, Traditional Chinese, and more

  • Smart Caching
    5-minute local cache for faster repeated checks and reduced API calls

  🎯 WHO NEEDS THIS?

  • Web Developers & DevOps EngineersQuickly verify SSL configurations during development and deployment

  • Security Professionals
    Perform rapid security assessments of websites

  • Website Owners & Administrators
    Monitor certificate expiration to prevent service disruptions

  • Privacy-Conscious Users
    Verify website security before entering sensitive information

  • IT Support Teams
    Troubleshoot SSL-related issues efficiently

  🚀 HOW TO USE

  1. Click the GuardSSL icon in your browser toolbar
  2. The extension automatically detects the current website's domain
  3. View instant SSL certificate analysis results
  4. Click "View Detailed Report" for comprehensive security analysis on GuardSSL.info

  🔐 PRIVACY & SECURITY

  • Privacy First: Only checks certificates when you click the extension icon
  • No Data Collection: We don't collect, store, or share your browsing history
  • Secure API: All checks are performed through encrypted HTTPS connections
  • Local Cache: Results are cached locally for 5 minutes to improve performance
  • Open Source: Transparent code you can trust

  📋 PERMISSIONS EXPLAINED

  • Active Tab: Required to read the current website's domain name for SSL checking
  • Storage: Used to cache SSL check results locally for better performance
  • Host Permissions (guardssl.info): Required to access our SSL checking API

  🌐 POWERED BY GUARDSSL

  GuardSSL is a professional SSL certificate monitoring service trusted by thousands of users worldwide. Visit https://guardssl.info for:
  - Automated certificate monitoring
  - Multi-channel expiration alerts
  - Batch domain checking
  - Historical tracking and reports

  💡 SUPPORT

  Need help or have suggestions?
  • Visit: https://guardssl.info
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  Stay secure, stay protected with GuardSSL!🛡️