visualgo.net

https://visualgo.net· First analyzed 05 May 2026· Updated 05 May 2026

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visualgo.net

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

188.114.97.3

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

CloudFlare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

luke.ns.cloudflare.com.melinda.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

850 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

573 KB

46 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

8 Technologies Detected

CSS Frameworks

Analytics

Libraries

Other

CDN

Customer Support

SEO Analysis

D58/100

Meta Tags7/15

Content11/12

Headings7/8

Technical11/25

E-E-A-T0/7

Images5/7

Links5/5

URL5/5

Social1/5

Freshness0/4

Mobile3/4

Indexability3/3

visualgo.netvisualgo.net

visualising data structures and algorithms through animation - Visu...

VisuAlgo was conceptualised in 2011 by Associate Professor Steven Halim (NUS School of Computing) as a tool to help his students better understand data struc...

Title truncated. Description truncated.

Title Length71 chars

Recommended: 50-60 chars (~423px / 580px)

Description Length771 chars

Recommended: 120-160 chars

Issues (2)

• Title is too long (71 chars, ~423px). Will be truncated in search results.
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

10 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

7/100

Poor

2 14 2

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

Sponsored

AI & LLM Readiness

F39/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

0/25

Citation

9/25

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:16%

Words:2,541

Token eff.:Optimal

Sections/1K:0.4

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary14w

Descriptive Headingsavg 7w

Canonical URL

Open Graph1/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

65/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

13/20

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

Forms & Inputs

7/15

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.

2 recommendations

•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

58 mg

CO₂e / view

572.6 KB

Page Weight

80%

Cleaner Than

New Visitor

66 mg

Returning (cached)

33 mg

Annual (10K/mo)

6.9 kg

Emission Segments

Data Center

3 mg

Network

17 mg

Device

38 mg

Resource Breakdown

Images

97.4 KB

CSS

452.8 KB

HTML

22.3 KB

Green Hosting Verified

Cloudflare

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

26%Critical

Interactive

HTTPS

WAF

68d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

14.04.2026

Valid Until

13.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

visualgo.net*.visualgo.net

SHA-256 Fingerprint

EB:04:D0:89:14:C8:82:6C:6C:56:7C:46:9B:98:55:DF:25:C7:D1:B8...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(no-cache, private)

cf-cache-status

DYNAMIC

cf-ray

9f70c4da9b52df0a-SJC

content-encoding

zstd

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

visualgo.net

Domain Age

11y 8m

Created

09.09.2014

Expires

09.09.2028

Last Updated

22.12.2021

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

70/100

Mobile Friendly5 breakpoints

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...

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Typography & Readability

SilkscreenNormal + PT Sans

WCAG Partial

55/100

Readability

/30

11/30

13px · LH --

Hierarchy

/20

16/20

3.85x ratio · ✓ H1→H6

WCAG

/25

13/25

1:1 min contrast

Performance

/25

15/25

2 fonts · 3 req

Heading Font

SilkscreenNormal

Sans50px

Body Font

PT Sans

Sans13px

Contrast Ratio

1:1

25 issues

Reading Comfort

~52 CPL

Optimal (45–75)

50px

15px

20px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line length: ~52 chars/line (ideal 45–75 CPL).

❌ Very complex text: Flesch score 19/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 25 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 3.9x larger than body text.

Buy on MyFontsFlesch 19

Color Palette

10 unique colors

2.77:1 Fail Light

#eeeeee

Background· 65.1%

#8d9093

Other· 3.3%

#acd8e6

Primary· 6.1%

#0b0e14

Secondary· 5.6%

#46769d

Secondary· 4.9%

#aad520

Accent· 4.8%

#6cbb78

Secondary· 4.1%

#cbdad5

Secondary· 2.7%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

HeapMid-Market

User behavior and product analytics

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

unpkg.com(2)code.jquery.com(1)cdn.jsdelivr.net(1)googletagmanager.com(1)cdnjs.cloudflare.com(1)

Website Identity

visualgo.net

11 years old

Location detected: 🇨🇦 Canadavia ip

NameCheap, Inc.en

Social Profiles

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Last analyzed: 05 May 2026 at 15:27

Historical Analysis & Change Tracking