b/cited
Menu
C
Design Tools

Spline

spline.design ↗

How this compares

Spline ranks #13 of 15 scanned design tools sites, scoring 72/100 — 5 points below the category average of 77. The category leader scores 84. Immediately above is InVision on 74, and immediately below, Canva on 69.

Cited by AI answer engines

In the week of Oct 11, 2026, none of the engines b/cited asked cited spline.design on the design tools prompts b/cited watches: OpenAI (gpt-4.1-mini) on 0 of 5, Anthropic (claude-sonnet-4-6) on 0 of 5, and Perplexity (sonar) on 0 of 5. 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
72 / 100
AEO
50 / 100
Rank
#13 of 15
Cited by AI
0 of 15
prompt × engine pairs, week of Oct 11, 2026
Last scanned
10/11/2026
Own spline.design? Sign in and verify it in Search Console to claim this listing.
Results
C
Overall
72 / 100
24 pass21 warn3 fail
Scanned
spline.design
0.3s · 48 checks
⚠ PSI_API_KEY not configured
Indexing & crawl96 / 10011✓1!
  • HTTPS
    served over https://
    Docs →
  • HTTP response
    200 OK
    Docs →
  • Time to first byte
    136ms (fast)
    Docs →
  • Redirect chain
    direct hit, no redirects
    Docs →
  • robots.txt present
    1317 bytes
    Docs →
  • robots.txt allows this URL
    Googlebot may crawl /
    Docs →
  • Sitemap referenced in robots.txt
    Sitemap: directive present
    Docs →
  • sitemap.xml present
    78 URLs
    Docs →
  • sitemap.xml uses <lastmod>
    no <lastmod> — Googlebot can't tell which URLs changed
    Docs →
  • No noindex directive
    page is indexable
    Docs →
  • Canonical URL
    self-referential: https://spline.design/
    Docs →
  • lang attribute on <html>
    lang="en"
    Docs →
Metadata88 / 1006✓2!
  • Title tag length
    67 chars — Google truncates titles around 55–60
    Docs →
  • Title tag present
    "Spline - 3D Design tool in the browser with real-time collaboration"
  • Meta description length
    167 chars — will truncate in SERP (target 120–160)
    Docs →
  • Meta description present
    "Spline is a free 3D design software with real-time collaboration to create web interactive experien…"
  • H1 heading
    single H1: "Make anything 3D"
  • Subheadings (H2)
    10 <h2> elements
  • Mobile viewport
    viewport meta present
  • Favicon
    icon link tag present
AEO (Answer Engines)50 / 1001✓6!1✗
  • llms.txt
    3916 bytes — AI crawlers get a curated index
    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
    absent — Organization schema lets AI engines name your brand correctly
    Docs →
  • WebSite / WebApplication schema
    absent — anchors site identity for AI answer engines
    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 data0 / 1001✗
  • JSON-LD structured data present
    no <script type="application/ld+json"> blocks — page has no structured data for rich results
    Docs →
Social cards70 / 1002✓3!
  • 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)
    twitter:card, twitter:title, twitter:description, twitter:image all present
    Docs →
  • twitter:image:alt
    no twitter:image:alt — limits accessibility on the X.com card
    Docs →
Security64 / 1003✓3!1✗
  • HSTS (Strict-Transport-Security)
    max-age=63072000 (≥1 year)
    Docs →
  • X-Content-Type-Options nosniff
    header missing
    Docs →
  • Clickjacking protection
    X-Frame-Options: SAMEORIGIN
    Docs →
  • Content-Security-Policy
    no CSP header — strong defense-in-depth signal
    Docs →
  • Referrer-Policy
    no Referrer-Policy — browsers will use defaults that leak 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 →
Mobile60 / 1001✓4!
  • Viewport meta
    width=device-width
    Docs →
  • Apple touch icon
    no apple-touch-icon — iOS home-screen bookmarks will use a fallback
    Docs →
  • theme-color meta
    no theme-color — mobile browser chrome uses default color
    Docs →
  • AMP variant
    no AMP variant — Google no longer requires AMP; informational only
    Docs →
  • Web app manifest
    no manifest — site is not installable as a PWA
    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.