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explore.bl.uk

https://explore.bl.uk· First analyzed 12 May 2026· Updated 12 May 2026
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explore.bl.uk
Desktop screenshot of explore.bl.uk
Mobile screenshot of explore.bl.uk
Mobile

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Hosting Provider

Microsoft Azure
azure.microsoft.com

IP Address

150.171.110.49

Site Location

🇬🇧 United Kingdomvia tld

Server Location

🇺🇸 Los Angeles, United States

ASN

AS8075

Organization

Microsoft Corporation

Performance

77

Core Web Vitals

Weight

First Contentful Paint
2.7 s10%
Speed Index
3.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3.2 MB
102 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Ghost

Technology Stack

5 Technologies Detected

Icon Libraries

2
Font AwesomeMaterial Icons

Frameworks

1
Angularv19.1.3

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

SEO Analysis

D47/100
14
10
2
Meta Tags4/15
Content6/12
Headings8/8
Technical14/25
E-E-A-T0/7
Images2/7
Links4/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability0/3
E
explore.bl.ukexplore.bl.uk

British Library catalogue

No description available for this page.

Title Length25 chars

Recommended: 50-60 chars (~146px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Page is set to noindex — will not appear in search results

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

robots.txt

22 rules

Sitemap reference found

Local SEO

Local Search Readiness

3/100
Poor
1 14 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
19/25
Machine Read.
7/25
Schema Data
0/25
Citation
7/25

AI Bot Access

13/14 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:1%
Words:344
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary47w
Descriptive Headingsavg 3.2w
Canonical URL
Open Graph0/3
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

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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.
A
88/100
17
Passed
3
Critical
1
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
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
12/15
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.
39/100
E
329 mg
CO₂e / view
3.2 MB
Page Weight
30%
Cleaner Than
New Visitor
376 mg
vs
Returning (cached)
188 mg
Annual (10K/mo)
39.5 kg
Emission Segments
Data Center
16 mg
Network
97 mg
Device
216 mg
Resource Breakdown
JavaScript
2.2 MB
Images
238.2 KB
CSS
52.7 KB
HTML
9.9 KB
Other
732.2 KB
Green Hosting Verified
Microsoft Azure
Provider Match
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
C

Security Score

66%Fair
Interactive

HTTPS

No WAF

75d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

28.04.2026

Valid Until

27.07.2026

Subject Alternative Names (1)

catalogue.bl.uk

SHA-256 Fingerprint

3C:55:CA:9F:CD:53:17:B7:AF:16:51:A6:4A:91:64:42:08:9F:05:D3...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-security-policy
object-src blob: 'self' *.exlibrisgroup.com *.exlibrisgroup....
content-type
text/html
date
Tue, 12 May 2026 10:13:52 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

explore.bl.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.
C
68/100
Mobile Friendly34 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...
Upgrade to view recommendations

Typography & Readability

Noto Sans Display

WCAG AA
82/100
Readability
/30
24/30

16px · LH 1.50

Hierarchy
/20
17/20

4x ratio · ✓ H1→H6

WCAG
/25
21/25

5.74:1 min contrast

Performance
/25
20/25

2 fonts · 2 req

Heading Font

Noto Sans Display

Sans64px

Body Font

Noto Sans Display

Sans16px

Contrast Ratio

5.74:1

WCAG AA (≥4.5:1)

Reading Comfort

~38 CPL

Narrow lines
64px
h1
45px
h2
28px
h3
16px
p

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

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

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.7:1).

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

✅ Strong hierarchy: Headlines are 4.0x larger than body text.

Buy on MyFontsFluid TypeFlesch 43

Color Palette

3 unique colors
Light
#f4f3ef
Primary· 70.2%
#e8e5dc
Secondary· 25.8%
#9d7e78
Secondary· 4.1%

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

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Scripts & Styles

15 Resources

5
Scripts
10
Styles
0
Async
0
Defer

Top Script Sources

bl.libanswers.com(2)custom(1)polyfills.eb1fd8cfc29acafd.js(1)main.70ac5d25b3de3098.js(1)

Website Identity

explore.bl.uk

Location detected: 🇬🇧 United Kingdomvia tld
en

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Last analyzed: 12 May 2026 at 10:14

Historical Analysis & Change Tracking