plesseysemiconductors.com

https://plesseysemiconductors.com· First analyzed 02 Jun 2026· Updated 02 Jun 2026

Export

Mobile

Sponsored

Hosting Provider

UKFAST.NET LIMITED

IP Address

94.229.167.137

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 Manchester, United Kingdom

ASN

AS61323

Server

Nginx

Nameservers

ns1.ukfast.net.ns0.ukfast.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.3 s10%

Speed Index

1.7 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

20.6 MB

43 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

WordPressv7.0

Infrastructure

Hosting

UKFAST.NET LIMITED

Technology Stack

12 Technologies Detected

Plugins

Contact Form 7

Honeypot Complianz Gdpr

CSS Frameworks

Libraries

Other

Icon Libraries

Analytics

Web Servers

Languages

SEO Analysis

B76/100

Meta Tags7/15

Content11/12

Headings7/8

Technical24/25

E-E-A-T2/7

Images2/7

Links2/5

URL5/5

Social5/5

Freshness4/4

Mobile4/4

Indexability3/3

plesseysemiconductors.complesseysemiconductors.com

Home - Plessey

Plessey is a UK-based photonics pioneer with 70+ years of innovation, developing MicroLED displays and optical computing technologies for AR, AI, and next-er...

Description truncated.

Title Length14 chars

Recommended: 50-60 chars (~87px / 580px)

Description Length228 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (13/13) — critical for accessibility and SEO

6 issues found

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Crawlability

Sitemap

Type: index

3 URLs

3 sub-sitemaps

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

24/100

Needs Work

8 9

Sponsored

AI & LLM Readiness

D53/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

7/25

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

data-nosnippet

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

header/footer

Text ratio:5%

Words:636

Token eff.:Optimal

Sections/1K:11

Depth:1/5

Structured Data

4 JSON-LD

Organization×1.1WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary327w

Descriptive Headingsavg 6.6w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

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.

89/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

Semantic Structure

17/20

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

15/15

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

ARIA & Roles

9/15

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.

26/100

2.61 g

CO₂e / view

20.6 MB

Page Weight

Cleaner Than

New Visitor

2.98 g

Returning (cached)

1.49 g

Annual (10K/mo)

312.9 kg

Emission Segments

Data Center

582 mg

Network

626 mg

Device

1.40 g

Resource Breakdown

JavaScript

156.2 KB

Images

20.2 MB

CSS

194.2 KB

HTML

16.6 KB

Other

13.1 KB

Green Hosting Not Verified

UKFAST.NET LIMITED

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

123d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

19.03.2026

Valid Until

03.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (8)

plessey.complessey-semi.complesseysemi.complesseysemiconductors.comwww.plessey-semi.comwww.plessey.comwww.plesseysemi.comwww.plesseysemiconductors.com

SHA-256 Fingerprint

B8:AA:F8:1C:EA:78:8D:53:E8:8B:AB:B1:44:94:43:92:8D:A9:5E:D5...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-length

16734

content-type

text/html; charset=UTF-8

date

Tue, 02 Jun 2026 14:49:50 GMT

link

<https://plessey.com/wp-json/>; rel="https://api.w.org/", <h...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

plesseysemiconductors.com

Domain Age

16y 6m

Created

27.11.2009

Expires

27.11.2027

Last Updated

28.09.2025

Registrar

eNom, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Complianz

Cookie Consent Banner

Complianz

GDPR Indicators

Cookie consent banner detected

CMP: Complianz

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.

69/100

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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

TTLight

WCAG Partial

62/100

Readability

/30

21/30

19px · LH 1.30

Hierarchy

/20

14/20

3.16x ratio

WCAG

/25

12/25

1:1 min contrast

Performance

/25

15/25

1 font · 2 req

Heading Font

TTLight

Sans60px

Body Font

TTLight

Sans19px

Contrast Ratio

1:1

25 issues

Reading Comfort

~40 CPL

Narrow lines

60px

48px

38px

19px

✅ Excellent readability: 19px body text is ideal for all devices.

⚠️ Tight line spacing (1.30). Increase to 1.4–1.6 for better readability.

⚠️ Hard to read: Flesch score 31/100. Simplify sentences for wider reach.

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

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 3.2x larger than body text.

Buy on MyFontsFlesch 31

Color Palette

10 unique colors

Light

#ffffff

Text· 9.5%

#030206

Primary· 24%

#622642

Secondary· 16%

#220812

Accent· 12.2%

#421329

Accent· 12.2%

#af5e94

Secondary· 6.5%

#872e61

Secondary· 5.8%

#6b5069

Secondary· 5.1%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

ComplianzSMB

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

plessey.com(15)unpkg.com(1)

Website Identity

Plessey

Organization

Plessey is a UK-based photonics pioneer with 70+ years of innovation, developing MicroLED displays and optical computing technologies for AR, AI, and next-era wearables — research to volume production under one roof in Plymouth.

plessey.com/

16 years old

Location detected: 🇬🇧 United Kingdomvia ip

eNom, LLCen-US

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube

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Last analyzed: 02 Jun 2026 at 14:50

Historical Analysis & Change Tracking