b/cited
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C
Design Tools

Zeplin

zeplin.io ↗

How this compares

Zeplin ranks #7 of 15 scanned design tools sites, scoring 79/100 — 2 points above the category average of 77. The category leader scores 84. Immediately above is Penpot on 80, and immediately below, Miro on 78.

Cited by AI answer engines

In the week of Oct 11, 2026, zeplin.io was cited by OpenAI (gpt-4.1-mini) on 1 of 5, Anthropic (claude-sonnet-4-6) on 1 of 5, and Perplexity (sonar) on 0 of 5 design tools prompts b/cited watches. Its best position was #3, on “Which design tool works best for handing finished screens to developers building in React?” (OpenAI (gpt-4.1-mini)). Citations are engine output at the time of the run, not a b/cited rating, and the prompts are a sample, not a census.

Overall
79 / 100
AEO
56 / 100
Rank
#7 of 15
Cited by AI
2 of 15
prompt × engine pairs, week of Oct 11, 2026
Last scanned
10/11/2026
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Results
C
Overall
79 / 100
32 pass17 warn2 fail
Scanned
zeplin.io
0.6s · 51 checks
⚠ PSI_API_KEY not configured
Indexing & crawl95 / 1009✓1!
  • HTTPS
    served over https://
    Docs →
  • HTTP response
    200 OK
    Docs →
  • Time to first byte
    307ms (fast)
    Docs →
  • Redirect chain
    direct hit, no redirects
    Docs →
  • robots.txt present
    no robots.txt found — Google will assume full-crawl is allowed but a file lets you signal sitemap location
    Docs →
  • sitemap.xml present
    133 URLs
    Docs →
  • sitemap.xml uses <lastmod>
    lastmod hints help Googlebot prioritize re-crawls
    Docs →
  • No noindex directive
    page is indexable
    Docs →
  • Canonical URL
    self-referential: https://zeplin.io/
    Docs →
  • lang attribute on <html>
    lang="en"
    Docs →
Metadata100 / 1008✓
  • Title tag length
    41 chars — within SERP-display range
    Docs →
  • Title tag present
    "Zeplin · Bring harmony to design delivery"
  • Meta description length
    114 chars — within SERP-display range
    Docs →
  • Meta description present
    "Document designs, map user flows, track version changes — deliver with confidence without changing …"
  • H1 heading
    single H1: "Design tools are for designing. Zeplin is for clear, structured delivery."
  • Subheadings (H2)
    4 <h2> elements
  • Mobile viewport
    viewport meta present
  • Favicon
    icon link tag present
AEO (Answer Engines)56 / 1002✓5!1✗
  • llms.txt
    missing — recommended for sites you want cited by LLMs
    Docs →
  • ai.txt (Spawning consent)
    missing (optional) — Spawning consent file is not load-bearing for citation, but signals intent
    Docs →
  • AI crawler stance in robots.txt
    no AI crawler rules — robots.txt is default-permissive (most AI bots will follow this)
    Docs →
  • FAQPage schema (citation-friendly)
    absent — FAQPage is one of the most-cited schema types in AI answers
    Docs →
  • HowTo schema
    absent — HowTo gets cited heavily for procedural queries
    Docs →
  • Organization schema
    present
    Docs →
  • WebSite / WebApplication schema
    present
    Docs →
  • Author / Person schema (E-E-A-T)
    absent — author credibility is part of Google E-E-A-T and feeds AI citation trust
    Docs →
Structured data75 / 1003✓3!
  • JSON-LD structured data present
    1 JSON-LD block(s)
    Docs →
  • JSON-LD valid JSON
    all blocks parsed cleanly
    Docs →
  • Organization or WebSite schema
    Organization + WebSite
    Docs →
  • Sitelinks searchbox (SearchAction)
    no SearchAction — your site can't opt into the sitelinks searchbox feature
    Docs →
  • BreadcrumbList
    no BreadcrumbList — Google may not show your breadcrumb path in SERP
    Docs →
  • Content-specific schema in use
    no content-type schema (Article, Product, FAQPage, HowTo, …) — opportunity for rich results
    Docs →
Social cards50 / 1001✓3!1✗
  • Open Graph (core 5)
    og:title, og:description, og:image, og:url, og:type all present
    Docs →
  • og:image dimensions
    no og:image:width / og:image:height — crawlers must download the image to learn dimensions
    Docs →
  • og:image:alt
    no og:image:alt — sets alt text when image is shared
    Docs →
  • Twitter Card (core 4)
    missing 3: twitter:title, twitter:description, twitter:image
    Docs →
  • twitter:image:alt
    no twitter:image:alt — limits accessibility on the X.com card
    Docs →
Security93 / 1006✓1!
  • HSTS (Strict-Transport-Security)
    max-age=31536000 (≥1 year)
    Docs →
  • X-Content-Type-Options nosniff
    nosniff set
    Docs →
  • Clickjacking protection
    X-Frame-Options: SAMEORIGIN
    Docs →
  • Content-Security-Policy
    6263 bytes of policy
    Docs →
  • Referrer-Policy
    strict-origin-when-cross-origin
    Docs →
  • Permissions-Policy
    no Permissions-Policy — opportunity to restrict unused browser APIs
    Docs →
  • No mixed content
    no http:// asset references on this https page
    Docs →
Performance50 / 1001!
  • PageSpeed Insights API
    PSI_API_KEY not configured
    Docs →
Mobile80 / 1003✓2!
  • Viewport meta
    viewport disables pinch-zoom — Google flags this as an accessibility issue
    Docs →
  • Apple touch icon
    apple-touch-icon link tag present
    Docs →
  • theme-color meta
    declared (consider pairing with prefers-color-scheme for dark mode)
    Docs →
  • AMP variant
    no AMP variant — Google no longer requires AMP; informational only
    Docs →
  • Web app manifest
    manifest link declared
    Docs →
International50 / 1001!
  • hreflang annotations
    no hreflang declarations — fine for English-only sites; required for localized variants
    Docs →

Scores reflect the last automated crawl and refresh weekly; citation-panel results are engine output and refresh weekly with the scan. Want a live audit of your own site? Run a free scan.