chemguide.co.uk

https://chemguide.co.uk· First analyzed 02 May 2026· Updated 02 May 2026

Export

chemguide.co.uk

Mobile

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Hosting Provider

Zen Internet Ltd

IP Address

82.71.205.12

Site Location

🇬🇧 United Kingdomvia tld

Server Location

🇬🇧 Stockport, United Kingdom

ASN

AS13037

Organization

Zen Internet Ltd

Server

Nginx

Nameservers

ns1.zen.co.uk.ns0.zen.co.uk.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

292 ms10%

Speed Index

380 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2 KB

1 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Zen Internet Ltd

Technology Stack

1 Technologies Detected

Web Servers

Nginx

SEO Analysis

D44/100

Meta Tags13/15

Content11/12

Headings0/8

Technical4/21

E-E-A-T0/7

Images0/7

Links4/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

chemguide.co.ukchemguide.co.uk

chemguide: helping you to understand Chemistry - Main Menu

Main menu of a site aimed to help advanced level chemistry students to understand chemistry

Title Length59 chars

Recommended: 50-60 chars (~363px / 580px)

Description Length91 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

11 issues found

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Local SEO

Local Search Readiness

0/100

Poor

15 2

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

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AI & LLM Readiness

F33/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

2/25

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

code blocks

Text ratio:42%

Words:495

Token eff.:Optimal

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary470w

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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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.

63/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

3/20

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.

3 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.

57/100

A+

<0.001 g

CO₂e / view

2.3 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

36 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

HTML

2.3 KB

Green Hosting Not Verified

Zen Internet Ltd

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

50d

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

24.03.2026

Valid Until

22.06.2026

Subject Alternative Names (13)

autodiscover.c5369738.myzen.co.ukc5369738.myzen.co.ukchemguide.co.ukchemguide.ukcpanel.c5369738.myzen.co.ukcpcalendars.c5369738.myzen.co.ukcpcontacts.c5369738.myzen.co.ukmail.c5369738.myzen.co.uk+5 more

SHA-256 Fingerprint

73:38:2A:10:73:D4:74:48:3A:FF:28:13:5C:52:FA:26:E2:C4:78:C6...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

⚡ Brotli(br)

content-type

text/html

date

Sat, 02 May 2026 12:14:33 GMT

last-modified

Mon, 28 Mar 2022 09:31:39 GMT

server

nginx

vary

Accept-Encoding

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.chemguide.co.uk

Domain Information

chemguide.co.uk

DNSSEC

Not Enabled

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.

29/100

Not 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.

5 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Times New Roman

WCAG AAA

69/100

Readability

/30

21/30

16px · LH --

Hierarchy

/20

10/20

WCAG

/25

24/25

7.24:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Times New Roman

Body Font

Times New Roman

Serif16px

Contrast Ratio

7.24:1

WCAG AAA (≥7:1)

Reading Comfort

Single Family

left aligned

16px

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

⚠️ Hard to read: Flesch score 33/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 7.2:1).

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 33

Color Palette

7 unique colors

Light

#ffffcb

Primary· 85.3%

#d6d5ae

Secondary· 3.3%

#a3a588

Secondary· 2.7%

#b7be9a

Secondary· 2.3%

#d6f0c1

Accent· 2.2%

#707859

Secondary· 1.5%

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Website Identity

chemguide.co.uk

Location detected: 🇬🇧 United Kingdomvia tld

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Last analyzed: 02 May 2026 at 12:14

Historical Analysis & Change Tracking