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nayuki.io

https://nayuki.io· First analyzed 12 May 2026· Updated 12 May 2026
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nayuki.io
Desktop screenshot of nayuki.io
Mobile screenshot of nayuki.io
Mobile

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Hosting Provider

DigitalOcean
digitalocean.com

IP Address

142.93.122.137

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 North Bergen, United States

ASN

AS14061

Organization

DigitalOcean, LLC

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

zara.ns.cloudflare.com.brad.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
458 ms10%
Speed Index
595 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
224 KB
24 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
DigitalOcean
CDN
Cloudflare

Technology Stack

3 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Web Servers

1
Nginxv1.22.1

SEO Analysis

D57/100
17
7
2
Meta Tags4/15
Content8/12
Headings8/8
Technical17/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness2/4
Mobile4/4
Indexability3/3
N
nayuki.ionayuki.io

Project Nayuki

No description available for this page.

Title Length14 chars

Recommended: 50-60 chars (~84px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (13/13) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

240 URLs

robots.txt

1 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

6/100
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

D44/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
0/25
Citation
11/25

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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
navheader/footer
Text ratio:14%
Words:197
Token eff.:Too Short
Sections/1K:20.3
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary11w
Descriptive Headingsavg 1.2w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
AI readiness recommendation preview...
Upgrade to view recommendations

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.
A
80/100
11
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
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
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
71/100
A+
23 mg
CO₂e / view
223.7 KB
Page Weight
95%
Cleaner Than
New Visitor
26 mg
vs
Returning (cached)
13 mg
Annual (10K/mo)
2.7 kg
Emission Segments
Data Center
1 mg
Network
7 mg
Device
15 mg
Resource Breakdown
Images
14.4 KB
CSS
186.7 KB
Fonts
19.6 KB
HTML
3.0 KB
Green Hosting Verified
DigitalOcean
Provider Match
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

76%Good
Static / Informational

HTTPS

No WAF

80d

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

03.05.2026

Valid Until

01.08.2026

Subject Alternative Names (2)

nayuki.iowww.nayuki.io

SHA-256 Fingerprint

ED:2B:CB:80:E7:1B:1D:3D:B0:35:0D:12:72:77:CD:37:84:EA:60:88...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

content-encoding
📦 Gzip(gzip)
content-type
application/xhtml+xml; charset=UTF-8
date
Tue, 12 May 2026 10:14:11 GMT
server
nginx/1.22.1
x-content-type-options
nosniff
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

50

SPF
DKIM
DMARC

MX Records (1)

mail.eigenstate.org

Domain Information

nayuki.io

Domain Age
11y 6m

Created

07.11.2014

Expires

07.11.2031

Last Updated

29.11.2025

Registrar

Gandi SAS

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

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.
C
60/100
Mobile Friendly1 breakpoint
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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Avenir LT Std

WCAG Partial
72/100
Readability
/30
21/30

16px · LH 1.35

Hierarchy
/20
17/20

1.8x ratio · ✓ H1→H6

WCAG
/25
16/25

1.54:1 min contrast

Performance
/25
18/25

1 font · 2 req

Heading Font

Avenir LT Std

Sans29px

Body Font

Avenir LT Std

Sans16px

Contrast Ratio

1.54:1

32 issues

Reading Comfort

~39 CPL

Narrow lines
29px
h1
21px
h2
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Tight line spacing (1.35). Increase to 1.4–1.6 for better readability.

⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 32 elements below WCAG AA threshold (min 1.5:1).

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

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 34

Color Palette

5 unique colors
16.29:1 AAA Light
#ffffff
Background· 74.8%
#202020
Other· 16.200000000000003%
#dddfe4
Primary· 4.1%
#b4afbf
Secondary· 3.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

4 Resources

3
Scripts
1
Styles
3
Async
0
Defer

Top Script Sources

googletagmanager.com(2)google-analytics.com(1)

Website Identity

nayuki.io

11 years old
Location detected: 🇺🇸 United Statesvia ip
Gandi SASen

Social Profiles

GitHub

Sponsored

Last analyzed: 12 May 2026 at 10:14

Historical Analysis & Change Tracking