Public Audit Report

www.caltech.edu

https://www.caltech.edu/
Scanned on April 12, 2026
55
Overall
D
63
SEO
59/94 passed
46
AEO
24/52 passed
48
GEO
28/58 passed
111
Passed
93
Failed
204
Total Checks
Poor
Rating

Quick Wins — Top 5 Issues to Fix

SEO — 63/100 (35 issues)

Failed Checks (35)

  • ✗No theme-color meta tag — improves mobile browser appearancemeta
  • ✗Title-H1 alignment: 0% word overlap — title and H1 should share key termscontent
  • ✗Readability: 0 (difficult — simplify language)content
  • ✗71% long sentences (>20 words) — break up for readabilitycontent
  • ✗1 of 122 images missing ALT text (99% have it)content
  • ✗24 images missing width/height — causes layout shift (CLS)content
  • ✗58 of 122 images use legacy formats (JPG/PNG/GIF) — convert to WebP/AVIF for 25-50% smaller filescontent
  • ✗4 non-descriptive link text(s) found ("read more"...) — use descriptive anchor text for SEOcontent
  • ✗Missing canonical tag — risk of duplicate contenttechnical
  • ✗No hreflang tags — add if targeting multiple languagestechnical
  • ✗Deprecated HTML tags found: <centertechnical
  • ✗Text-to-HTML ratio: 3.9% — too code-heavy, add more contenttechnical
  • ✗9 render-blocking scripts — add defer or async attributeperformance
  • ✗No font preload/preconnect — add for faster renderingperformance
  • ✗No Cache-Control header — browser cannot cache effectivelyperformance
  • ✗No Strict-Transport-Security headersecurity
  • ✗No Terms of Service link — add for legal compliance and trusttrust
  • ✗No JSON-LD structured data foundschema
  • ✗91 HTTP resource(s) on HTTPS page — security risktechnical
  • ✗No Web App Manifest — add for installability and modern web signalstechnical
  • ✗No dns-prefetch or preconnect hints — add for faster third-party loadingperformance
  • ✗Only 0 first-person pronouns — add personal experience (E-E-A-T)content
  • ✗7% sentences use transition words — aim for 20%+content
  • ✗No max-image-preview:large — add to robots meta for Google Discovermeta
  • ✗2 paragraph(s) exceed 150 words — break up for readabilitycontent
  • ✗H1 length: 16 characters — too short, aim for 20-70content
  • ✗284 links on page — exceeds 100 limit, may dilute link equitycontent
  • ✗DOM size: ~1971 elements — exceeds 1500, may slow renderingperformance
  • ✗7 render-blocking script(s) in head — add defer or asyncperformance
  • ✗2 form input(s) without labels — bad for accessibility and screen readersaccessibility
  • ✗1 duplicate ID(s) found: "search-form" (2x) — must be unique per HTML specaccessibility
  • ✗1 iframe(s) without sandbox attribute — security risksecurity
  • ✗No RSS/Atom feed in <head> — add for content discovery by aggregators and AItechnical
  • ✗No IndexNow integration — add for instant Bing/Yandex indexing on content changestechnical
  • ✗3 of 7 H2 sections have < 50 words — add more content or merge thin sectionscontent

Passed Checks (59)

  • ✓Title tag found: "Home - www.caltech.edu"meta
  • ✓Title length: 41 characters (optimal)meta
  • ✓Meta description found (133 chars)meta
  • ✓Description length: 133 chars (optimal)meta
  • ✓Viewport meta tag found (mobile-friendly)meta
  • ✓UTF-8 charset declaredmeta
  • ✓Language attribute set on HTML tagmeta
  • ✓No meta refresh redirect (good)meta
  • ✓No robots meta tag (default: index, follow)meta
  • ✓Single H1 tag foundcontent
  • ✓7 H2 tags foundcontent
  • ✓Heading hierarchy is correctcontent
  • ✓1679 words on page (good content depth)content
  • ✓JS-based lazy loading detectedcontent
  • ✓92 internal links foundcontent
  • ✓191 external links foundcontent
  • ✓No empty href attributes foundcontent
  • ✓Open Graph title foundsocial
  • ✓Open Graph description foundsocial
  • ✓Open Graph image foundsocial
  • ✓Open Graph URL foundsocial
  • ✓og:type set to "website"social
  • ✓og:site_name: "California Institute of Technology"social
  • ✓Twitter Card: "summary"social
  • ✓Twitter title foundsocial
  • ✓Twitter description foundsocial
  • ✓Twitter image foundsocial
  • ✓HTTPS enabledtechnical
  • ✓Favicon foundtechnical
  • ✓Apple touch icon foundtechnical
  • ✓Compression: enabled (vary: accept-encoding)technical
  • ✓URL length: 24 chars (good)technical
  • ✓URL uses hyphens or no separators (good)technical
  • ✓Inline CSS: 0.0 KB (acceptable)performance
  • ✓Inline JS: 2.0 KB (acceptable)performance
  • ✓X-Content-Type-Options: nosniffsecurity
  • ✓Content-Security-Policy header presentsecurity
  • ✓About page link found — builds trust and E-E-A-Ttrust
  • ✓Contact page/email link foundtrust
  • ✓Privacy Policy link foundtrust
  • ✓Author byline foundtrust
  • ✓<!DOCTYPE html> declaredtechnical
  • ✓Viewport includes width=device-width (responsive)meta
  • ✓robots.txt found and allows crawlingtechnical
  • ✓robots.txt includes Sitemap referencetechnical
  • ✓No AI crawlers blocked in robots.txt — AI search and training can access contenttechnical
  • ✓sitemap.xml found with valid formattechnical
  • ✓Sitemap contains 64 URL(s)technical
  • ✓All 5 checked internal links are workingcontent
  • ✓0% nofollow links (0/283) — good link equity flowcontent
  • ✓OG image uses absolute URL (correct)social
  • ✓52% responsive images (srcset/picture)content
  • ✓Referrer-Policy: strict-origin-when-cross-originsecurity
  • ✓Permissions-Policy header presentsecurity
  • ✓Title and meta description are different (good)meta
  • ✓Viewport allows zoom (good for accessibility)accessibility
  • ✓No snippet blocking detected (good — content is fully accessible)technical
  • ✓4 third-party script domain(s) (acceptable)performance
  • ✓ARIA landmarks present: main, nav, skip-linkaccessibility
AEO — 46/100 (28 issues)

Failed Checks (28)

  • ✗No structured data — AI systems struggle to categorize your pagediscoverability
  • ✗No definition lists (<dl>) — great for term/value pairsdiscoverability
  • ✗No code blocks — add <code>/<pre> for technical contentdiscoverability
  • ✗No FAQ section found — add Q&A content for AI citationstructure
  • ✗No data tables — tables help AI compare and cite datastructure
  • ✗No numbered steps or ordered lists — add for "how to" AI answersstructure
  • ✗29% short sentences — shorten sentences for better AI parsingstructure
  • ✗75% concise paragraphs — break up long paragraphsstructure
  • ✗Few key-value patterns — use "**Label:** value" format for AIstructure
  • ✗No author information — AI values attributed contentcitation
  • ✗No Organization schema — AI may not recognize your brandcitation
  • ✗Only 2/5 E-E-A-T signals — add about, contact, author infocitation
  • ✗Only 1 concise answer paragraph(s) after headings — add 2+ short summaries (40-200 chars) right after H2/H3 tagscitation
  • ✗No Speakable schema — add for voice assistant optimizationvoice
  • ✗First paragraph too short for AI snippetsvoice
  • ✗No SearchAction schema — add for enhanced search presencevoice
  • ✗Avg 61 words/sentence — simplify for AI and voicevoice
  • ✗Pronoun density: 0.3% — add more "you/your" for engagementvoice
  • ✗No summary section — add Key Takeaways for AI extractionvoice
  • ✗Few Q&A blocks — add question headings followed by answer paragraphsvoice
  • ✗No /llms.txt found — add one to guide AI crawlers (emerging standard)discoverability
  • ✗No sameAs links in schema — add social profiles for brand recognitioncitation
  • ✗Brand name inconsistent — align site name across title, og:site_name, Organization schemacitation
  • ✗No Table of Contents — add jump links for AI content navigationstructure
  • ✗No video content — multimedia increases AI engagement and citation ratediscoverability
  • ✗Statistics lack source references — attribute data to boost AI trustcitation
  • ✗No <details>/<summary> elements — use for expandable Q&A contentstructure
  • ✗Brand "California Institute of Technology" mentioned only 1 time(s) — repeat for entity recognitioncitation

Passed Checks (24)

  • ✓1679 words in HTML — good content for AI parsingdiscoverability
  • ✓Clean URL structurediscoverability
  • ✓5 semantic HTML5 elements founddiscoverability
  • ✓35 content sections — well-structured for AIdiscoverability
  • ✓Description + OG description both present — clear topic signalsdiscoverability
  • ✓168 named entities found — helps AI understand contextdiscoverability
  • ✓92 internal links — good topic cluster signaldiscoverability
  • ✓Question-style headings found — ideal for AI snippetsstructure
  • ✓46 lists found — structured content for AIstructure
  • ✓Concise answer paragraphs after headings — great for AI citationstructure
  • ✓Avg 150 words/section — sufficient depthstructure
  • ✓Publication/modification date foundcitation
  • ✓Statistics and data found in content — highly citablecitation
  • ✓Source citations found — increases AI trustcitation
  • ✓191 external links — references authoritative sourcescitation
  • ✓Content references 2026/2025 — fresh contentcitation
  • ✓Topic focus: 100% — title keywords found in contentcitation
  • ✓5 conversational words — good for AI summariesvoice
  • ✓Active voice dominant (7% passive) — AI-friendlyvoice
  • ✓16 H2/H3 headings — good content structure for AIvoice
  • ✓No AI-blocking robots directives — AI crawlers can access contentdiscoverability
  • ✓Freshness signal found (Last-Modified header or dateModified)citation
  • ✓AI crawlers allowed in robots.txt (0/4 explicitly listed)discoverability
  • ✓Content updated within 90 days — fresh content gets 3.2x more AI citationscitation
GEO — 48/100 (30 issues)

Failed Checks (30)

  • ✗Few question headings — add Q&A headings for AI Overviewoverview
  • ✗Title and H1 don't align — confusing for AI topic matchingoverview
  • ✗No step-by-step content — add numbered guides for AIoverview
  • ✗No author schema — add for AI trust signalsauthority
  • ✗Incomplete brand identity — add og:site_name + Organization schemaauthority
  • ✗No original data signals — "our research shows..." boosts AI citationauthority
  • ✗No examples or case studies — add real-world examplesauthority
  • ✗No links to authoritative sources — cite Google, Schema.org, etc.authority
  • ✗No FAQ Schema — add for Google rich results + AI Overviewformat
  • ✗No HowTo Schema — add for step-by-step rich resultsformat
  • ✗No comparison content — add vs. sections for AI recommendationsformat
  • ✗No summary section — add Key Takeaways or TL;DR for AIformat
  • ✗1 images missing ALT textformat
  • ✗No BreadcrumbList schema — add for better AI contextformat
  • ✗Only one list type — use both <ul> and <ol> for content varietyformat
  • ✗Only 2/6 formatting types — use bold, lists, tables, quotes, codeformat
  • ✗Single-perspective content — add "on the other hand..." for balanceformat
  • ✗No conclusion — add recommendations or a verdict sectionformat
  • ✗No entity Schema types — add Person, Product, or Organization schemasemantic
  • ✗No <time> elements — wrap dates in <time datetime="...">semantic
  • ✗Few data points with units — add specific numbers (e.g., "300+ users")semantic
  • ✗No canonical URL — AI may index duplicate versionstechnical
  • ✗Only 0 Schema type(s) — add more for AI contexttechnical
  • ✗2 image(s) with generic/short ALT text — use descriptive textformat
  • ✗First 200 words lack topic keywords — AI may skip your content for extractionoverview
  • ✗Only 0 data points — add 5+ statistics for +30-40% AI visibility (Princeton study)authority
  • ✗Author lacks credentials — anonymous content is a GEO penaltyauthority
  • ✗Only 1/6 question types — add What, Why, How headingsoverview
  • ✗No <figure>/<figcaption> — wrap images with descriptive captions for AIformat
  • ✗No authoritative sameAs links — add Wikipedia/Wikidata/LinkedIn URIs to schema for Knowledge Graph alignmentauthority

Passed Checks (28)

  • ✓Definition-style content found — featured snippet candidateoverview
  • ✓Content freshness signals detectedoverview
  • ✓Comprehensive content (1679 words, 7 sections)overview
  • ✓2-level heading hierarchy — deep content structureoverview
  • ✓63% optimal paragraphs (20-80 words) — AI-friendlyoverview
  • ✓Source citations found — increases AI trustauthority
  • ✓2/5 trust signals foundauthority
  • ✓Expert quotes or testimonials found — authority signalauthority
  • ✓3 industry terms used — domain expertise signalauthority
  • ✓101 unique external domains — diverse sourcesauthority
  • ✓Data visualization elements found (tables/charts)format
  • ✓Actionable advice found — AI prefers practical contentformat
  • ✓5/14 semantic HTML5 elements — deep semantic structuresemantic
  • ✓100% title keywords in first 200 words — good prominencesemantic
  • ✓184 contextual links — good cross-referencingsemantic
  • ✓Content categorization found — clear topic classificationsemantic
  • ✓4 sections have subtopics (H3) — deep coveragesemantic
  • ✓Mobile-friendly (viewport set)technical
  • ✓HTTPS secure — trusted by AI systemstechnical
  • ✓Page size: 298 KB — reasonabletechnical
  • ✓Open Graph fully configured (title, description, image)technical
  • ✓Page allows AI indexing (no noindex/nosnippet)technical
  • ✓HTML lang="en" set (add og:locale for completeness)technical
  • ✓4 ARIA landmarks found — good accessibility for AItechnical
  • ✓1679 words — sufficient depth for AI analysisoverview
  • ✓Definition + list combo — strong featured snippet candidateoverview
  • ✓No snippet restrictions — AI can freely extract content (good)technical
  • ✓Link anchor texts are descriptive — good AI context signalsemantic

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