Google Core Web Vitals & PageSpeed
Simulate live mobile and desktop user environments. Measure LCP, CLS, INP, FCP, and TBT with Google Lighthouse v10 optimization diagnostics.
LCP < 2.5s
CLS < 0.1
INP < 200ms
New: Core Web Vitals & Security Scanning v2
The Ultimate Website
Audit & Intelligence Platform
Run comprehensive audits for PageSpeed, Accessibility, Dead Links, and Security vulnerabilities with a single click.
Running multi-tool analysis...
Mobile
⏳ Scanning...-
Desktop
⏳ Waiting...-
🛡️ Security Scan Report
Security Score: ⏳ Scanning...
Connecting to security services...
| Severity | Vulnerability | Details |
|---|
Waiting for results...
🔗 Site-Wide Dead Link Crawler
Scanned: 0
In Queue: 0
Broken: 0
🕷️ Crawling in progress...
Checking: ...
| Status | Link Text | Failed URL | Source Page |
|---|
No broken links found yet...
♿ Accessibility Summary
Awaiting scan...
🧾 W3C Validation Report
⏳ Waiting▼
Total: 0
Errors: 0
Warnings: 0
Comprehensive 360° Website Quality Engines
SiteAuditor 360 combines 12 enterprise-grade audit engines into a unified testing hub. Inspect Core Web Vitals, technical SEO, Scott Helme security headers, WCAG 2.2 accessibility, and automated QA test suites.
🔍
Technical SEO & Schema Inspector
Audit title tags, meta descriptions, canonical URLs, robots.txt directives, XML sitemaps, OpenGraph cards, and JSON-LD structured data.
Meta Tags
Schema.org
Hreflang
🛡️
Scott Helme Security Headers Grading
Evaluate HTTP response headers following the Scott Helme / SecurityHeaders.com standard. Check CSP, HSTS, X-Frame-Options, and Permissions-Policy.
Grade A+ to F
CSP & HSTS
OWASP Compliant
♿
WCAG 2.2 AA / AAA Accessibility
Automated accessibility evaluation powered by Axe-Core 4.11 and Puppeteer. Test color contrast, ARIA landmarks, form labels, and keyboard focus states.
WCAG 2.2
Section 508
ADA Compliant
🔗
Dead Links & Broken URL Crawler
High-speed asynchronous link crawler supporting up to 10,000 URLs. Detect 404 not found errors, 500 server crashes, and circular redirect chains.
404 Finder
Redirect Chains
Deep Spider
🧪
Automated QA Testcase Studio
Intelligent DOM inspector that segments H1/H2 heading containers and forms to synthesize complete 12-column QA test suites for staging and prod verification.
12-Column Suite
DOM Scraper
CSV Export
⚖️
Staging vs Live SEO Comparator
Perform side-by-side pre-deploy SEO regression audits across WordPress ACF post types, Next.js sitemaps, and custom web applications before launch.
Pre-Deploy QA
WordPress REST
Visual Diff
🖼️
Deep Image Optimizer & Asset Scanner
Scan all embedded media for missing alt text, oversized dimensions, lack of modern WebP/AVIF formats, and slow rendering impact on Cumulative Layout Shift.
Alt Text Audit
WebP / AVIF
CLS Prevention
How SiteAuditor 360 Works
Three straightforward steps to audit, optimize, and rank your website on Google.
1
Enter Target Webpage
Paste your live production domain, staging URL, or specific landing page link into the audit search bar above and select your desired audit modules.
2
Multi-Engine Deep Scan
Our distributed engine concurrently evaluates Core Web Vitals, accessibility rules, SSL/TLS certificates, security headers, and technical SEO structure.
3
Review & Export Fixes
Receive categorized remediation instructions, visual code snippets, CSS selectors, and export executive PDF reports or CSV test suites for your team.
Frequently Asked Questions (FAQ)
Everything you need to know about website audits, Core Web Vitals, and SEO rankings.
What is SiteAuditor 360? ▼
SiteAuditor 360 is an enterprise-grade website audit and QA intelligence platform that analyzes Google Core Web Vitals, technical SEO, Scott Helme security headers, WCAG 2.2 accessibility, dead links, and automated test cases in real-time.
How does SiteAuditor 360 test Google Core Web Vitals? ▼
SiteAuditor 360 interfaces directly with the Google PageSpeed Insights and Lighthouse engines to measure Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), Interaction to Next Paint (INP), First Contentful Paint (FCP), and Total Blocking Time (TBT) across both mobile and desktop viewports.
What is Scott Helme Security Headers grading? ▼
SiteAuditor 360 grades HTTP response security headers according to the Scott Helme and SecurityHeaders.com standard (grades A+ through F), analyzing Content-Security-Policy (CSP), Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.
How does WCAG 2.2 Accessibility scanning work? ▼
SiteAuditor 360 utilizes Axe-Core 4.11 and headless Puppeteer to evaluate DOM elements against WCAG 2.0, 2.1, and 2.2 levels A, AA, and AAA. It audits color contrast ratios, ARIA landmarks, form labels, image alt attributes, and keyboard navigability.
Can I compare SEO metadata between Staging and Production sites? ▼
Yes, the built-in SEO Meta Comparator module enables side-by-side verification of title tags, meta descriptions, canonical URLs, and H1 headings between Staging and Production to prevent SEO regressions prior to deployment.
Is SiteAuditor 360 free to use? ▼
Yes, SiteAuditor 360 provides all 12 diagnostic audit engines, automated QA testcase generation, and full PDF/CSV reports completely free of charge.
✅ W3C HTML5 Validated
⚡ Google Core Web Vitals v10
🛡️ Scott Helme Standard (A+)
♿ WCAG 2.2 AA / AAA
🔒 OWASP Security Compliant
🚀 Google Lighthouse & Chrome UX Engine
Google PageSpeed &
Core Web Vitals
Audit live performance, FCP, LCP, CLS, TBT, Speed Index, and optimization opportunities for Mobile and Desktop.
Running Google Lighthouse & Core Web Vitals audit...
Mobile
⏳ Scanning...-
Desktop
⏳ Waiting...-
🔗 High-Performance Concurrent Crawler
Site-Wide
Dead Link Crawler
Recursively crawl internal and external links in real time. Detect broken 404s, redirected URLs, and network timeouts.
Scanned: 0
In Queue: 0
Broken: 0
🕷️ Crawling in progress...
Checking: ...
| Status | Link Text | Failed URL | Source Page |
|---|
No broken links found yet...
♿ WAVE & Axe-Core Diagnostics
Automated
Accessibility Audit
Fast automated evaluation for contrast errors, missing image alt text, label associations, and document outline hierarchy.
Auditing accessibility rules...
♿ Automated Accessibility Audit (WAVE & WCAG)
Live Engine ActiveAwaiting scan...
🧾 Official W3C Nu HTML Checker
Official W3C
HTML Validator
Validate HTML markup syntax and standard compliance directly with the official validator.w3.org service.
Querying W3C validator service...
🧾 W3C Validation Report
⏳ Waiting
Total: 0
Errors: 0
Warnings: 0
🛡️ Qualys SSL Labs & Shodan Intelligence
Infrastructure & SSL
Security Audit
Assess Qualys SSL Labs TLS grading, certificate validity, Shodan active CVE vulnerabilities, and attack surface.
🛡️ Security Scan Report
Security Score: ⏳ Scanning...
Connecting to security services...
| Severity | Vulnerability | Details |
|---|
Waiting for results...
✨ Independent Real-Browser WCAG 2.0 / 2.1 / 2.2 Engine
Accessibility Testing 2
Automated URL-based accessibility auditor inspired by Skynet Free Accessibility Checker. Evaluates rendered DOM in a real browser context, analyzes WCAG compliance, flags manual review items, and generates professional PDF reports.
💡 Pro-tip: Enter any publicly accessible webpage URL. The scanner runs in headless Chromium and checks the fully rendered DOM.
Running Automated Accessibility Audit...
Initializing headless Chromium browser...
✔
URL & SSRF Security Validation
⏳
Loading Rendered DOM & Executing JavaScript
○
Axe-Core WCAG 2.0 / 2.1 / 2.2 Rule Matrix
○
Contrast, ARIA, Headings & Structure Analysis
○
Generating Score & Recommendations
⚠️
Scan Failed
An error occurred while running the accessibility test.
https://example.com
2026-09-14 15:30
ℹ️
Important Notice on Automated Testing:
Automated engines identify approximately 30%–50% of WCAG success criteria. A high automated score is a major milestone, but do not mark the website as fully WCAG compliant without human verification with screen readers and keyboard navigation.
Overall Accessibility Score
--
/100
Analyzing...
📊
Total Checks
0
Rules Evaluated
✅
Passed
0
Success criteria passed
❌
Failed
0
Violations detected
⚠️
Warnings
0
Potential concerns
📋
Manual Review
0
Requires human test
Filter by Category:
| Issue | Status | Severity | WCAG / Level | Disability | Description | Element | Actions |
|---|
No issues match the selected filters.
📋 Manual Review Required Checklist
Essential for 100% WCAG ComplianceThese accessibility requirements cannot be verified by automated software and require manual evaluation by a human tester using assistive technologies:
🛡️ SecurityHeaders.com Engine
Scott Helme / Snyk Grading Matrix
Scan Your Site's
Security Headers
Evaluate HTTP response headers against industry security baselines. Identify missing protection directives, sensitive data disclosure, and actionable hardening recommendations.
Inspecting HTTP Response Headers...
Querying server endpoint, resolving DNS IP, and evaluating security policy directives...
⚠️
Scan Failed
An error occurred while inspecting HTTP headers.
—
—
Security Report Summary
—
Security Grade
Site:
—
IP Address:
—
Report Time:
—
Headers:
Solid grade, let's perform a deeper security analysis of your website and APIs.
Missing Headers
Raw Headers
| Header | Value |
|---|
Upcoming Headers
These are upcoming security headers that are in draft or beginning adoption:
Additional Information
🔍 Technical SEO Engine
Google Search Central Standards & Schema.org
Technical SEO Audit
Comprehensive on-page and technical SEO validator evaluating Meta Tags, Title & Description length, Canonical URLs, Robots indexability, Headings hierarchy (H1-H6 tree), JSON-LD Schema, Open Graph previews, and Image alt attributes.
Auditing Technical SEO & On-Page Signals...
Parsing Title, Descriptions, Canonical, Headings Outline, Schema, Open Graph, and Image attributes...
—
—
Title ?
0 characters
-
Description ?
0 characters
-
Keywords ?
0 values
-
URL ?
Canonical ?
Robots Tag ?
-
Author ?
-
Publisher ?
Lang ?
-
| H1 | H2 | H3 | H4 | H5 | H6 ? | Images ? | Links ? |
|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
📊
?
ALL LINKS
ALL METAS
ALL SCRIPTS
XFN / Rel attr. (Xhtml Friends Network) ?
Detailed SEO Extension Suite • Comprehensive Meta & Signals Architecture
Headings Breakdown (H1 – H6)
| H1 | H2 | H3 | H4 | H5 | H6 | Total Headings |
|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Headings Hierarchy & Document Outline
Hierarchical tree structure of headings as indexed by search engines:
TOTAL IMAGES ?
0
WITH ALT
0
WITHOUT ALT
0
WITH TITLE
0
WITHOUT TITLE
0
Images Inventory (0)
LINKS ?
0
unique
0
internal unique
0
without TITLE
0
LINKS <A />
OPEN GRAPH (Facebook) ?
TWITTER CARD ?
twitter:card
-
twitter:site
-
twitter:creator
-
twitter:title
-
twitter:description
-
twitter:image
No Image
-
External SEO & Performance Testing Tools
Instant 1-click diagnostic benchmarks for this target page:
SEO Audit Summary
-
SEO Grade
Site:
-
Overall Score:
-
Findings:
Issues: -
Passed: -
Indexable
Canonical Valid
Single H1
Schema Detected
Google Search SERP Snippet Preview
Simulated visual representation of how this page renders in Google SERPs:
https://example.com
Example Title
Example description snippet showing how search engines summarize the page.
Title Length
-
Target: 40-60 chars
Meta Description
-
Target: 120-160 chars
Headings Found
-
H1: - | H2: - | H3: -
Images & Alt Tags
-
Missing Alt: -
Word Count
-
Visible body text
Links Found
-
Internal vs External
Technical Issues & Recommendations (0)
Passed Checks & Optimized Signals (0)
🖼️ Deep Multi-Page Crawler & Asset Format Detector
Node Image Link Extractor
Deep multi-page crawler, asset format detector (WebP, PNG, JPG, SVG, AVIF), resolution inspector, and broken image link validator.
Auditing target website...
0%
📊 Execution Metrics & Discovery Stats
Pages Audited
0
Crawled HTML pages
Unique Images
0
Discovered assets
Verified Links
0
HTTP 2xx / 3xx OK
Broken Links
0
HTTP 4xx / 5xx / Error
Media & Asset Formats Discovered
🏷️ Logos 0
🎬 Videos 0
WebP 0
PNG 0
JPG/JPEG 0
SVG 0
AVIF 0
Other Media 0
🔍 Media Asset Inventory
📡
Live Crawler Activity:
Ready for scan instructions.
0 Issues
| Preview | Media Source URL | Format & Type | HTTP Status | Referencing Page URL |
|---|---|---|---|---|
|
📥
Launch an audit to discover and analyze image assets.
|
||||
💻 Live Audit Log
>_ Ready for scan instructions.