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· 9 checks — Internal links, mixed-content guards, Open Graph previews, and structured data rolled into one auditable list.
SCORE
80
GRADE
B
FIX
2
REVIEW
2
PASS
5
INFO
0
Checks
9
5 PASS 2 REVIEW 2 FIX
F
Image Optimization
Action
5 issues found across 24 images
FIX
5 issues found across 24 images
Warning::
3 images significantly larger than display size
Resizing to display dimensions could save approximately 93 KB.
Got: ~93 KB wasted
Warning::
24 images missing explicit width/height
Images without dimensions cause layout shifts (CLS). Set explicit width and height attributes.
Info::
3 of 24 images use legacy formats
Warning::
17 images missing alt text
Alt text is essential for screen readers and SEO. Every meaningful image needs descriptive alt text.
Info::
8 image(s) wider than 400px without srcset (no responsive serving)
These images deliver the same asset to every viewport (mobile, tablet, retina). Adding srcset / <picture> lets the browser pick a viewport-appropriate variant and typically saves 40-70% of bytes on mobile. Sample: https://images.ctfassets.net/8aevphvgewt8/1uXZYDy7dMcH9QwxuAU06F/1cb167cc60d725b8cf7089faf9a4ed06/accordion-2-730955545f07.webp, https://images.ctfassets.net/8aevphvgewt8/3xzVZaJhqo3B62R8NeHjX2/e37c81e4f26e9dac2aff1f23a0243087/accordion-3-52ca331d22ea.webp, https://images.ctfassets.net/8aevphvgewt8/3cgNgdKFqflI27vyDh4Gpa/c459dc8690133e7663b8db2626cf2045/accordion-4-a26744b70ff7.webp (+5 more).
D
Brand Presence
Action
Site-name consistency, favicon, social image, meta tags, schema, and contact signals
FIX

Brand Presence

Your brand name differs across channels — visitors see inconsistent identity.

D

53/100

Site name appears as

Page titleTwitch
og:site_nameGitHub
twitter:site@github
Organization.name—

Inconsistent — names differ across channels

Brand assets

Favicon

8/15

covers SVG

Social share image

20/20

og:image + twitter:image set

Meta completeness

20/20

Organization schema

0/15

Contact info discoverable

0/10

no contact info discoverable

Findings

  • Brand name differs across channels — users see inconsistent identity
  • Single favicon only — add apple-touch-icon for iOS home-screen and high-DPI support
  • No Organization schema — Google can't render your logo in the knowledge panel
  • No discoverable contact info — trust signal is weak, legal risk is higher in regulated regions

How consistently your brand appears across channels — shared link previews, structured data, favicon, contact info.

C
Structured Data
Action
No structured data (JSON-LD) found.
REVIEW
No structured data (JSON-LD) found.
Info::
No structured data (JSON-LD) found
Adding structured data helps search engines understand your content and can enable rich results.

Adding structured data helps search engines understand your content and can enable rich results.

Why this matters

Without schema.org markup, your pages can't appear as rich results (stars, FAQs, recipes) in search.

Learn more ▾

Structured data is what unlocks rich snippets — review stars, FAQ accordions, recipe cards, breadcrumbs, etc. — that take up more SERP space and dramatically improve click-through. The schema.org vocabulary is well-documented and JSON-LD is the easiest format.

Source: Google Search Central / schema.org

No structured data found

Structured data (JSON-LD) helps search engines understand your content better. Adding it can improve your search result appearance.

Common types include:

  • WebSite — your site identity and search box
  • Organization — your company information
  • Article — blog posts and news articles
  • Product — e-commerce product pages
  • BreadcrumbList — navigation paths
Learn more at schema.org
C
Rich Results Eligibility
Action
No JSON-LD found -- no rich-result eligibility
REVIEW
No JSON-LD found -- no rich-result eligibility
Info::
No JSON-LD structured data on the page
No `<script type="application/ld+json">` blocks found. Without structured data, search engines fall back to inferring page meaning from raw HTML -- which works but doesn't unlock SERP features (rich snippets, knowledge panel, FAQ accordion, breadcrumb trail). Adding even basic JSON-LD (Organization for the site identity, BreadcrumbList for navigation context) is a low-effort SEO win.
A+
Mixed Content
No mixed content detected — all resources use HTTPS.
PASS
No mixed content detected — all resources use HTTPS.
Info::
No mixed content detected — all resources use HTTPS
A
Open Graph
Open Graph tags are well configured for social sharing.
PASS
Open Graph tags are well configured for social sharing.
Critical::
og:image is not reachable
The og:image URL could not be fetched. Social platforms won't be able to display it.
Got: https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Universe-img.png
URL: https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Universe-img.png

The og:image URL could not be fetched. Social platforms won't be able to display it.

Why this matters

An unreachable og:image URL (404, DNS fail, slow timeout) means social platforms cache the failure and serve no image for hours.

Learn more ▾

Social platforms (Facebook, Twitter) cache OG metadata aggressively — including failed image fetches. A momentarily-broken og:image can leave your shares imageless for hours. Test og:image URLs in Facebook's Sharing Debugger to force re-cache after fixing.

Source: Open Graph Protocol / Facebook Sharing Debugger

Preview

github.com

GitHub · Change is constant. GitHub keeps you ahead.

Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.

Preview quality · Twitter/X A+ · 100/100
  • twitter:card — summary_large_image
  • twitter:title — GitHub · Change is constant. GitHub keeps you ahead.
  • twitter:description — Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the...
  • twitter:image — https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Univers...

GITHUB.COM

GitHub · Change is constant. GitHub keeps you ahead.

Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.

Preview quality · Facebook A+ · 95/100

Description will be truncated (186 chars / 155 max)

  • og:title — GitHub · Change is constant. GitHub keeps you ahead.
  • og:description — Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the...
  • og:image — https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Univers...
  • og:type — object
  • og:url — https://github.com/
  • og:site_name — GitHub

  • Description will be truncated on Facebook (186 chars, max 155)

    → Tighten og:description to ≤155 characters

GitHub · Change is constant. GitHub keeps you ahead.

github.com

Preview quality · LinkedIn A+ · 95/100

Description will be truncated (186 chars / 150 max)

  • og:title — GitHub · Change is constant. GitHub keeps you ahead.
  • og:description — Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the...
  • og:image — https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Univers...

  • Description will be truncated on LinkedIn (186 chars, max 150)

    → Tighten og:description to ≤150 characters

github.com

GitHub · Change is constant. GitHub keeps you ahead.

Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.

Preview quality · Slack A+ · 100/100
  • og:title — GitHub · Change is constant. GitHub keeps you ahead.
  • og:description — Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the...
  • og:image — https://images.ctfassets.net/8aevphvgewt8/4pe4eOtUJ0ARpZRE4fNekf/f52b1f9c52f059a33170229883731ed0/GH-Homepage-Univers...

Social preview quality

Averaged across Twitter/X, Facebook, LinkedIn, and Slack.

A+ · 97/100
FieldTwitter/XFacebookLinkedInSlack
og:title
og:description
og:image
og:type
og:url
og:site_name
twitter:card———
twitter:title———
twitter:description———
twitter:image———
A+
Open Graph / Twitter Card Depth
OG image dimensions and Twitter card configuration look healthy
PASS
OG image dimensions and Twitter card configuration look healthy
Info::
OG/Twitter Card depth is clean -- dimensions, card type, and inheritance all valid
A+
Autoplay Media
2 media element(s) found, none autoplay
PASS
2 media element(s) found, none autoplay
Info::
2 media element(s) found, none autoplay
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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