Audit Result

UUID: 01a09a98-db60-7285-9727-b433dc735c1a

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shell.online

https://shell.online/

Scanned 1 month ago

91
Excellent Score
39 total checks
Passed
33
Warnings
5
Errors
1

Meta Information

  • Title Tag Pass

    Found 51 characters. Length is optimal.

  • Meta Description Pass

    Found 152 characters. Good snippet length.

  • Canonical URL Pass

    Canonical found: https://shell.online/

  • Favicon Pass

    Favicon found and reachable: /favicon.svg (HTTP 200).

    Favicon
  • Viewport Meta Pass

    Viewport configured: width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover, interactive-widget=resizes-content

  • HTML Lang Pass

    Language declared as "en".

Content Structure

Technical Optimization

  • HTTPS Pass

    Page is served over HTTPS.

  • HSTS & HTTPS Redirect Warning

    2 HTTPS hardening issues detected.

    • • Missing Strict-Transport-Security header.
    • • Could not probe the HTTP version of this page.

    Fix: Set Strict-Transport-Security with a long max-age, add includeSubDomains, and redirect all HTTP requests to HTTPS.

  • Security Headers Warning

    Missing: strict-transport-security.

    Full HTTP headers (17)
    • • alt-svc: h3=":443"; ma=86400
    • • cache-control: no-store
    • • cf-cache-status: HIT
    • • cf-ray: a3a6ec26af498185-IAD
    • • content-encoding: zstd
    • • content-security-policy: default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; connect-src 'self' wss: ws:; img-src 'self' data:; font-src 'self'; object-src 'none'; base-uri 'none'; frame-ancestors 'none'; form-action 'none'
    • • content-type: text/html
    • • cross-origin-opener-policy: same-origin
    • • date: Sun, 13 Sep 2026 11:48:22 GMT
    • • nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
    • • permissions-policy: camera=(), microphone=(), geolocation=()
    • • referrer-policy: no-referrer
    • • report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=aw%2BkQNT7bb5SOlI%2BN75EvWayXjIa%2BNQRB1C4%2Ft4ESTTdtqn3HuIMRrdpqmN1lFux35lZqeM%2FdeWOTqR1nq3HJszpVptEm04mB3cp5NKmFolOiokdvPEM2LmGqUXPmG%2FnLS%2BYXeFuuz4MOUw%3D"}]}
    • • server: cloudflare
    • • server-timing: cfCacheStatus;desc="HIT" cfEdge;dur=26,cfOrigin;dur=0,cfWorker;dur=12
    • • x-content-type-options: nosniff
    • • x-frame-options: DENY

    Fix: Add the missing security headers at your reverse proxy or application layer.

  • CSP Quality Pass

    Content Security Policy looks restrictive and avoids common unsafe directives.

    • • Content-Security-Policy: default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; connect-src 'self' wss: ws:; img-src 'self' data:; font-src 'self'; object-src 'none'; base-uri 'none'; frame-ancestors 'none'; form-action 'none'
  • Cookie Security Pass

    No first-party cookies were set during the initial page load.

  • Server Version Disclosure Pass

    Server response headers do not expose version tokens.

  • Cloudflare Proxy Pass

    Domain appears to be behind Cloudflare.

    • • server: cloudflare
    • • cf-cache-status: HIT
    • • cf-ray: a3a6ec26af498185-IAD
  • Perceived Load Time Pass

    Loaded in 0.23s (perceived).

  • Render Blocking Resources Warning

    0 scripts and 1 styles may block rendering.

    • • style: https://shell.online/assets/main-mKv2N1PD.css

    Fix: Defer non-critical scripts and inline critical CSS to improve first paint speed.

  • Compression Pass

    Text-like assets appear compressed.

  • Robots.txt Pass

    Found robots.txt (200).

  • Sitemap File Pass

    Found sitemap (200) at https://shell.online/sitemap.xml.

  • Crawl Directives Pass

    Robots meta found: index, follow, max-image-preview:large

Accessibility Basics

  • Form Labels Pass

    All 0 controls are labeled.

  • Landmarks Pass

    Header, nav, main, and footer landmarks are present.

  • Tap Target Size Warning

    20 interactive elements appear smaller than 48px.

    • • a.wordmark (shell.online home) - 102x23px
    • • a (Docs) - 31x16px
    • • a (Use cases) - 60x16px
    • • a.marketing-github-link (Open shell.online on GitHub — 85 stars) - 77x16px
    • • button.nav-install (Copy the shell.online install command) - 108x44px
    • • a.text-link (See how it works ↓) - 119x16px
    • • a.wordmark (shell.online home) - 421x23px
    • • a (Docs) - 22x12px
    • • a (Web app) - 40x12px
    • • a (Use cases) - 47x12px
    • • a (Mobile) - 32x12px
    • • a (Reliability) - 48x12px
    • • a (Security) - 38x12px
    • • a (E2EE) - 23x12px
    • • a (Docker) - 33x12px
    • • a (Platforms) - 45x12px
    • • a (Star on GitHub) - 69x12px
    • • a (Agent skill) - 51x12px
    • • a (llms.txt) - 34x12px
    • • a (v0.14.0 · SHA-256) - 78x12px

    Fix: Increase target size to at least 48x48 CSS pixels for touch interactions.

Social & Rich Results

  • Open Graph Basics Pass

    Core Open Graph tags are present.

  • Open Graph Image Pass

    og:image is present and absolute.

    Open Graph Image
  • Twitter Card Pass

    twitter:card set to summary_large_image.

  • Structured Data Pass

    JSON-LD schema detected.

  • PWA Metadata Pass

    Manifest and Apple touch icon are configured.

  • Open Graph/Twitter Quality Pass

    Social preview metadata and image quality look good for Open Graph/Twitter.

    • • GUIDELINE: Optimal og:title length: 40-60 characters (acceptable: 10-70).
    • • GUIDELINE: Optimal og:description length: 110-160 characters (acceptable: 50-200).
    • • GUIDELINE: Optimal preview image size: 1200x630 pixels.
    • • GUIDELINE: Optimal preview image aspect ratio: 1.91:1.
    • • GUIDELINE: Optimal preview image file size: under 5 MB.
    • • GUIDELINE: Recommended twitter:card: summary_large_image.
    • • MEASURED: Image size: 0.20 MB
    • • MEASURED: Image dimensions: 1200x630

Links Analysis

  • Internal Links Pass

    Checked 14 links. No broken internal links found.

  • External Links Pass

    No broken external links found in checked URLs.

  • Link Format Pass

    All 25 links use non-empty href values.

Performance & Runtime

  • Core Web Vitals: LCP Pass

    Largest Contentful Paint: 0.34s.

  • Core Web Vitals: CLS Pass

    Cumulative Layout Shift: 0.000.

  • Main Thread Blocking (TBT) Pass

    Total Blocking Time estimate: 14ms.

  • Broken Assets Error

    1 asset requests failed.

    • • https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495 (csp)

    Fix: Fix missing files, update asset URLs, and ensure static assets return HTTP 200.

  • JavaScript Runtime Errors Warning

    2 JavaScript runtime issues detected.

    • • Request failed: https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495 (csp, type: script)
    • • Loading the script 'https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495' violates the following Content Security Policy directive: "script-src 'self'". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. [https://shell.online/:1]

    Fix: Fix JS files returning 404/failed requests and resolve the listed runtime exceptions.