One scan, clearer signal
Group technical checks by what they help you decide: crawl access, trust, reliability, and user experience.
Loading CheckWebs…
Tool library
Find the right check for the layer you are debugging
Search 62 checks across crawl access, DNS, SSL, uptime, stack clues, security, email setup, and page structure. Start broad, then open the exact tool behind each signal.
62
Tools
8
Categories
No
Account required
Explore tool hubs
Website Audit
Comprehensive website audit and SEO analysis checks.
DNS & Domain
DNS lookup, domain age, and propagation checks.
Security
Website security, SSL, and HTTP header checks.
Performance & Tech
Website performance testing and tech stack detection checks.
Email deliverability and configuration checks.
Lookup & Info
Domain research, IP lookup, and WHOIS checks.
Utilities
Website utilities and technical generators.
Public AI Access
Public AI access, crawlability, and extractability checks.
Start by need
Pick the problem. CheckWebs picks the path.
A large tool library only works when the first click is obvious. Choose the situation you are dealing with, add a domain if you have one, and start at the right diagnostic layer.
How results stay readable
Find the right tool without extra reading
The hub pairs concise use cases with visual pathways, so users can move from a broad problem to a specific diagnostic faster.
Results built for action
Show the score, confidence, and next useful page without forcing readers through dense raw output.
Clearer next steps
Connect broad website questions to the right checks for status, tech stack, ownership, age, and public content access.
All (62)Website Audit (10)DNS & Domain (8)Security (7)Performance & Tech (10)Email (2)Lookup & Info (5)Utilities (8)Public AI Access (12)
SEO Analyzer
Check if your website is SEO-friendly with a full on-page audit
Website Audit~3s
Accessibility Checker
Check if your website is accessible and WCAG compliant
Website Audit~3s
UI/UX Audit
AI-powered visual design and usability review
Website Audit~8s
Public AI Access Check
Check whether public pages are crawlable and easy for AI tools to parse
Public AI Access~3s
Public AI Access Audit
Run a complete public AI access diagnostic in one report
Public AI Access~10s
Full Website Audit
Complete audit: SEO + Accessibility + UI/UX + public AI access
Website Audit~12s
DNS Lookup
Look up all DNS records for any domain
DNS & Domain~2s
WHOIS Lookup
Domain registration details and ownership info
DNS & Domain~3s
MX Record Lookup
Find mail exchange servers for a domain
DNS & Domain~1s
TXT Record Lookup
View all TXT records including SPF, DKIM, DMARC
DNS & Domain~1s
Nameserver Lookup
Find authoritative nameservers for a domain
DNS & Domain~1s
DNSSEC Checker
Check if DNSSEC is enabled and properly configured
DNS & Domain~2s
Domain Age Checker
Find out when a domain was registered and when it expires
DNS & Domain~3s
SSL Certificate Checker
Check if your website SSL certificate is valid and secure
Security~2s
HTTP Headers Analyzer
Inspect all HTTP response headers
Security~1s
Security Headers Grade
Grade your security headers (CSP, HSTS, X-Frame, etc.)
Security~2s
Redirect Chain Tracer
Trace the full redirect chain from URL to final destination
Security~2s
Robots.txt Viewer
View and analyze a site's robots.txt file
Security~1s
Mixed Content Scanner
Find insecure HTTP resources on HTTPS pages
Security~3s
Tech Stack Detector
Identify technologies, frameworks, and CMS used by a website
Performance & Tech~3s
Meta Tags Checker
Inspect all meta tags including Open Graph and Twitter Cards
Performance & Tech~1s
Social Share Preview
Preview how your URL looks when shared on social media
Performance & Tech~2s
Carbon Footprint
Estimate the carbon emissions of a webpage
Performance & Tech~2s
Sitemap Checker
Validate and analyze a website's sitemap.xml
Performance & Tech~2s
Broken Link Checker
Find broken links on any webpage
Performance & Tech~8s
Page Speed Test
Measure page load performance and Core Web Vitals
Performance & Tech~5s
Email Configuration Checker
Check SPF, DKIM, DMARC, and mail server configuration
Email~3s
IP Address Lookup
Find the IP address and geolocation of any domain
Lookup & Info~2s
Server Location
Find where a website's server is physically located
Lookup & Info~2s
Website Status Checker
Check if a website is up or down right now
Lookup & Info~1s
Link Extractor
Extract all internal and external links from a webpage
Lookup & Info~2s
Port Scanner
Scan common ports to find open services
Lookup & Info~5s
Password Strength Checker
Test how strong your password is — 100% client-side, private
Utilities~0s
Meta Tag Generator
Generate perfect meta tags for SEO and social sharing
Utilities~0s
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes instantly
Utilities~0s
Base64 Encoder/Decoder
Encode or decode Base64 text instantly
Utilities~0s
URL Encoder/Decoder
Encode or decode URL-encoded strings
Utilities~0s
JSON Formatter & Validator
Format, validate, and beautify JSON data
Utilities~0s
Robots.txt Generator
Generate a robots.txt file for your website
Utilities~0s
CSP Header Generator
Build Content-Security-Policy headers visually
Utilities~0s
llms.txt Checker
Check if your site has an llms.txt file for AI crawlers
Public AI Access~2s
Structured Data Validator
Validate JSON-LD and Schema.org markup for rich results
Public AI Access~2s
Cookie & Privacy Checker
Audit cookies, tracking scripts, and GDPR compliance signals
Security~3s
Heading Structure Analyzer
Analyze H1-H6 heading hierarchy for SEO and accessibility
Website Audit~2s
HTTP/3 & Protocol Checker
Check if a website supports HTTP/2 or HTTP/3 (QUIC)
Performance & Tech~2s
Favicon & PWA Checker
Check favicons, web app manifest, and PWA readiness
Performance & Tech~3s
DNS Propagation Checker
Check if DNS changes have propagated globally
DNS & Domain~5s
BIMI Record Checker
Check Brand Indicators for Message Identification (email logo)
Email~2s
AI Crawler Audit
Check if AI crawlers (GPTBot, ClaudeBot) are blocked in robots.txt
Public AI Access~2s
Canonical URL Checker
Validate canonical URLs to prevent duplicate content issues
Website Audit~2s
Page Weight Analyzer
Analyze total page size, resources, and compression
Performance & Tech~2s
hreflang Checker
Validate hreflang tags for multi-language websites
Website Audit~2s
AI Content Score
Score how quotable and extractable your content is for AI
Public AI Access~2s
Entity Analyzer
Analyze entity density and knowledge graph signals
Public AI Access~2s
Semantic HTML Checker
Deep audit of HTML5 semantic elements and landmarks
Public AI Access~2s
Answer Engine Checker
Check if your content is formatted for AI answer engines
Public AI Access~2s
Citation Readiness
Score citation readiness and source trust signals
Public AI Access~2s
Knowledge Panel Checker
Check readiness for Google Knowledge Panel and AI entity recognition
Public AI Access~2s
AI Meta Tag Validator
Validate all meta tags that matter for AI and social sharing
Public AI Access~2s
Internal Link Analyzer
Analyze internal linking depth and orphan page signals
Website Audit~2s
Content Depth Checker
Analyze word count, readability, and content signals
Website Audit~2s
Image SEO Checker
Audit images for alt text, lazy loading, and modern formats
Website Audit~2s
Exact questions
Tools built for practical technical questions
Each tool is mapped to a problem a website team actually needs to verify: DNS changes, SSL warnings, crawl blocks, page metadata, uptime, stack clues, or security headers.
Diagnostic paths
Move from a broad issue to the right check
The tool library is organized around real tasks: crawler access, competitor research, outages, launch QA, DNS, SSL, and domain trust.
For crawler access, answer structure, and source clarity
Public AI access checks
Help teams check whether public content can be crawled, parsed, and understood without making citation promises.
For teams comparing monitoring suites and first-pass checks
Tool comparison and AI monitoring research
Help users understand what CheckWebs can validate now and what paid monitoring tools still handle better.
For BuiltWith, Wappalyzer, CMS, hosting, and stack queries
Competitor and stack research
Help users research what a website uses, who operates it, and which public infrastructure signals are visible.
For status, SSL, DNS, headers, and incident searches
Outage, trust, and security triage
Connect a broken-site question to the checks that explain whether the issue is DNS, TLS, redirects, or headers.