StackOptic
Back to Search
pfizer.co.uk favicon

pfizer.co.uk

https://pfizer.co.uk· First analyzed 21 May 2026· Updated 21 May 2026
Export
pfizer.co.uk
Desktop screenshot of pfizer.co.uk
Mobile screenshot of pfizer.co.uk
Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.18.34.128

Site Location

🇬🇧 United Kingdomvia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns2.p201.dns.oraclecloud.net.ns1.p201.dns.oraclecloud.net.ns4.p201.dns.oraclecloud.net.ns3.p201.dns.oraclecloud.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
554 ms10%
Speed Index
720 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
935 KB
90 requests

Image Optimization

Lazy LoadWebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Technology Stack

4 Technologies Detected

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

CDN

1
Cloudflare

SEO Analysis

D48/100
14
7
1
Meta Tags5/15
Content8/12
Headings0/8
Technical15/21
E-E-A-T0/7
Images0/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
P
pfizer.co.ukpfizer.co.uk

Pfizer UK | Pfizer UK

Breakthroughs that change patients' lives.

Title Length21 chars

Recommended: 50-60 chars (~123px / 580px)

Description Length43 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

8 issues found

Upgrade to view details

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

F37/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
0/25
Citation
10/25

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
Text ratio:3%
Words:515
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary15w
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
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.
B
74/100
10
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
8/20
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
3/15
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
B
95 mg
CO₂e / view
935.3 KB
Page Weight
80%
Cleaner Than
New Visitor
108 mg
vs
Returning (cached)
54 mg
Annual (10K/mo)
11.3 kg
Emission Segments
Data Center
5 mg
Network
28 mg
Device
62 mg
Resource Breakdown
JavaScript
151.9 KB
Images
667.8 KB
CSS
103.2 KB
HTML
12.4 KB
Green Hosting Verified
Cloudflare
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A+

Security Score

98%Excellent
Static / Informational

HTTPS

WAF

76d

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

Valid From

07.05.2026

Valid Until

05.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

pfizer.co.ukwww.pfizer.co.uk

SHA-256 Fingerprint

D4:C9:36:FB:3B:6A:A6:69:79:18:42:FA:8F:FF:07:38:CE:03:10:23...

Upgrade to view header details

HTTP Headers

Developer Console

age
27698
cache-control
🟡 4 Hours(public, max-age=14400)
cf-cache-status
HIT
cf-ray🇦🇹 Vienna
9fef89af78ffc4ea-VIE
content-encoding
📦 Gzip(gzip)
content-security-policy
connect-src 'self' *.addthis.com *.ads.linkedin.com/ *.adsrv...
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

custmx.cscdns.net

Domain Information

pfizer.co.uk

DNSSEC
Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner
OneTrust
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: OneTrust
Privacy policy page linked
Data Protection Officer mentioned

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
65/100
Mobile Friendly65 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=1.0
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

PfizerDiatype-Regular

WCAG Partial
67/100
Readability
/30
22/30

20px · LH 1.70

Hierarchy
/20
10/20
WCAG
/25
19/25

1:1 min contrast

Performance
/25
16/25

1 font

Heading Font

PfizerDiatype-Regular

Body Font

PfizerDiatype-Regular

Sans20px

Contrast Ratio

1:1

2 issues

Reading Comfort

~35 CPL

Narrow lines
20px
p

✅ Excellent readability: 20px body text is ideal for all devices.

⚠️ Hard to read: Flesch score 43/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.0:1).

✅ 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 43

Color Palette

10 unique colors
3.65:1 AA Large Light
#a7a7a8
Other· 36.2%
#464b53
Secondary· 5.2%
#4c8da8
Primary· 9.4%
#111326
Secondary· 7%
#392941
Secondary· 4.7%
#6b8895
Secondary· 0.9%

Business & Marketing Stack

2 Tools Detected

Advanced

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
OneTrustEnterprise

Cookie consent and privacy compliance tools

2

Categories

2

Total Tools

1

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

Sponsored

Scripts & Styles

21 Resources

11
Scripts
10
Styles
2
Async
7
Defer

Top Script Sources

local(8)assets.adobedtm.com(1)cdn.cookielaw.org(1)pkg-cdn.digitalpfizer.com(1)

Website Identity

pfizer.co.uk

Location detected: 🇬🇧 United Kingdomvia tld
en

Sponsored

Last analyzed: 21 May 2026 at 00:42

Historical Analysis & Change Tracking