deck.gl

https://deck.gl· First analyzed 29 May 2026· Updated 29 May 2026

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deck.gl

Mobile

Sponsored

Hosting Provider

GitHub Pages

pages.github.com

IP Address

185.199.109.153

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

ns3.dnsimple-edge.io.ns4.dnsimple-edge.org.ns1.dnsimple-edge.com.ns2.dnsimple-edge.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

541 ms10%

Speed Index

703 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

911 KB

43 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

JAMstack

⚡ SSG

Frontend

Framework

Docusaurusv3.9.2

CMS

Medium

Infrastructure

Platform

GitHub Pages

CDN

Fastly

Technology Stack

1 Technologies Detected

CSS Frameworks

Tailwind CSS

SEO Analysis

C61/100

Meta Tags5/15

Content9/12

Headings8/8

Technical17/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability3/3

deck.gldeck.gl

Home | deck.gl

deck.gl

Title Length14 chars

Recommended: 50-60 chars (~83px / 580px)

Description Length7 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (4/5) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

224 URLs

robots.txt

Local SEO

Local Search Readiness

8/100

Poor

2 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D49/100

Bot Access

20/25

Machine Read.

14/25

Schema Data

0/25

Citation

15/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:11%

Words:312

Token eff.:Optimal

Sections/1K:16

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary27w

Descriptive Headingsavg 6.2w

Canonical URL

Open Graph2/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (7)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

72/100

Passed

Critical

Warnings

Images & Alt Text

5/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

18/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

13/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

6/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

1 recommendation

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

58/100

113 mg

CO₂e / view

911.3 KB

Page Weight

80%

Cleaner Than

New Visitor

129 mg

Returning (cached)

64 mg

Annual (10K/mo)

13.5 kg

Emission Segments

Data Center

25 mg

Network

27 mg

Device

61 mg

Resource Breakdown

JavaScript

450.4 KB

Images

33.6 KB

CSS

422.0 KB

HTML

5.2 KB

Green Hosting Not Verified

GitHub Pages

2 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

34d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

04.04.2026

Valid Until

03.07.2026

Subject Alternative Names (1)

deck.gl

SHA-256 Fingerprint

87:1B:37:18:A4:66:56:03:41:D0:89:F9:D9:8A:AC:3F:B7:1C:BC:8B...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

age

cache-control

🟡 600s(max-age=600)

content-encoding

📦 Gzip(gzip)

content-length

5042

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

deck.gl

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

59/100

Mobile Friendly

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1.0

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

-apple-system

WCAG Partial

75/100

Readability

/30

18/30

14px · LH 1.65

Hierarchy

/20

20/20

5.71x ratio · ✓ H1→H6

WCAG

/25

17/25

2.59:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

-apple-system

Sans80px

Body Font

-apple-system

Sans14px

Contrast Ratio

2.59:1

7 issues

Reading Comfort

~32 CPL

Narrow lines

80px

24px

20px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Hard to read: Flesch score 39/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 2.6:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 5.7x larger than body text.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 39

Color Palette

5 unique colors

2.92:1 Fail Light

#ffffff

Background· 27.8%

#a49396

Secondary· 2%

#e1e8f0

Primary· 61.99999999999999%

#a01203

Accent· 6.3999999999999995%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)

Website Identity

deck.gl

Location detected: 🇺🇸 United Statesvia ip

Social Profiles

GitHub Medium

Sponsored

Last analyzed: 29 May 2026 at 17:19

Historical Analysis & Change Tracking