Features
WebCheckly provides comprehensive website detection capabilities to help you understand the technical details and operational status of websites
Core Detection Features
Page Link Check
Automatically crawl all links on the page and detect the availability, status code, and response time of each URL in real-time
- Intelligently extract all links on the page (a tags, img tags, etc.)
- Real-time streaming display of detection results
- Support HTTP/HTTPS protocol detection
- Display status code, response time, IP address and other information
- Automatically identify CDN and TLS status
Website Info Extraction
Deep analysis of website metadata, extracting titles, descriptions, keywords and other SEO-related information
- Extract page title, description, keywords
- Identify website language and character set
- Detect author, generator, viewport information
- Analyze robots.txt configuration
- Complete meta tag information
Domain Info Query
Get complete DNS records, IP addresses, geographic location and network information for domains
- IPv4/IPv6 address resolution
- MX, NS, TXT record queries
- ASN and ISP information
- Geographic location (country, city)
- Organization information identification
SSL Certificate Detection
Comprehensive analysis of SSL/TLS certificate details to ensure website security
- Certificate issuer and subject information
- Validity period and remaining days reminder
- Signature algorithm and key length
- DNS name (SAN) list
- Certificate status verification
Tech Stack Identification
Intelligently identify the technology stack, frameworks, CMS and third-party services used by websites
- Web server identification (Nginx, Apache, etc.)
- Frontend framework detection (React, Vue, Angular, etc.)
- CMS system identification (WordPress, Drupal, etc.)
- JavaScript library detection
- CDN, analytics tools, caching technology identification
- Security response header analysis
Quality & Experience Detection
Performance & Experience Detection
Based on Lighthouse Core Web Vitals detection to evaluate page loading performance and user experience
- Detect LCP (Largest Contentful Paint) metrics to evaluate loading speed
- Detect CLS (Cumulative Layout Shift) metrics to evaluate visual stability
- Detect TBT (Total Blocking Time) metrics to evaluate interaction responsiveness
- Provide detailed performance diagnostics and optimization recommendations
- Support performance analysis for SPA applications
SEO Compliance
Detect website SEO technical configuration to ensure compliance with search engine optimization standards
- Detect page title (Title) and meta description (Meta Description)
- Verify mobile-friendly configuration (Viewport)
- Check Robots.txt and Canonical link settings
- Evaluate search engine visibility for SPA applications
- Detect indexing status and crawlability
Frontend Security Scan
Detect frontend security risks and identify third-party script and security configuration issues
- Scan and analyze third-party script sources
- Detect security response headers (CSP, HSTS, etc.) configuration
- Identify potential XSS and CSRF risks
- Evaluate security of third-party resources
- Provide security improvement recommendations
Accessibility Compliance
Detect website accessibility compliance to ensure compliance with A11Y standards
- Detect form label binding and ARIA attributes
- Evaluate color contrast and readability
- Check keyboard navigation and tab order
- Identify accessibility barriers
- Provide improvement recommendations compliant with WCAG standards
Advanced Features
AI Analysis Report
Use AI technology to generate comprehensive analysis reports with professional insights
- Generate comprehensive analysis reports based on detection results
- Provide multi-dimensional scoring (availability, performance, security, SEO)
- Identify key issues and optimization opportunities
- Provide personalized optimization recommendations
- Support multiple analysis modes (balanced, performance-first, security-first, SEO-first)
Full Site Link Check
Full site link checking to discover hidden API endpoints and directory structures
- Full site link check, discover all links and resources on the page
- Discover hidden API endpoints and directory structures
- Detect link status and response information
- Support detection of multiple resource types
- Results automatically converted to page link check format
Continuous Monitoring
Uptime & Availability Monitoring
24/7 HTTP availability monitoring with configurable intervals, response time tracking, and instant downtime alerts
- Multi-interval monitoring (5/10/15/30 minutes) to fit different SLA needs
- Response time and HTTP status code history charts
- Instant down/up alerts via email notifications
- Availability trend analysis over 7/30/90 days
- Site-level aggregation across all check types
SSL & Domain Expiry Alerts
Automatically track SSL certificate and domain registration expiration to prevent unexpected outages
- SSL certificate validity countdown with early warning thresholds
- Domain registration expiration monitoring via WHOIS
- Alert notifications before certificates or domains expire
- Issuer, algorithm, and SAN details at a glance
- Continuous background checks — no manual intervention needed
Page Screenshot Monitoring
Periodically capture full-page screenshots to detect visual changes and regressions over time
- Headless Chromium rendering with accurate viewport capture
- Historical screenshot gallery with status code and response time
- Automatic 90-day retention with cleanup to manage storage
- Side-by-side comparison of visual changes over time
- Detect rendering failures and layout regressions
SLA Reports & Status Pages
Comprehensive SLA reporting and shareable public status pages for transparency and trust
- Site-level and task-level SLA aggregation (uptime %, response time, incidents)
- Public status pages with secure, unguessable tokens — share with clients
- Alert history with read/unread tracking and deduplication
- Broken link monitoring to catch 404s as they happen
- Export-ready reports for compliance and stakeholder review
System Features
Real-time Streaming Detection
Using SSE technology to achieve real-time data streaming, detection results are displayed instantly without waiting
- Server-Sent Events (SSE) real-time push
- Progress bar real-time update
- Detection results displayed one by one
- Scan status real-time feedback
- Support long-running scan tasks
Multi-format Report Export
Support multiple formats of detection report export for subsequent analysis and archiving
- JSON format (complete data structure)
- Markdown format (readable document)
- Excel format (table data)
- One-click copy to clipboard
- Contains complete detection results and statistics
Security Protection Mechanism
Built-in multiple security protections to prevent SSRF attacks and malicious scanning
- SSRF attack protection (prohibit internal IP)
- URL format validation
- Scan frequency limit
- Timeout protection mechanism
- Concurrency control
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