freebookcentre.net

https://freebookcentre.net· First analyzed 12 May 2026· Updated 12 May 2026

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freebookcentre.net

Mobile

Sponsored

Hosting Provider

Sucuri

IP Address

192.124.249.56

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Menifee, United States

ASN

AS30148

Organization

Sucuri

Server

Sucuri/Cloudproxy

CDN

Sucuri

WAF

Sucuri

Nameservers

ns04.domaincontrol.com.ns03.domaincontrol.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.0 s10%

Speed Index

1.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

645 KB

55 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Sucuri

CDN

Sucuri

Technology Stack

15 Technologies Detected

Advertising

Google Ads Google AdSense Criteo Outbrain

Analytics

CSS Frameworks

Icon Libraries

Font Awesome Material Icons

Libraries

Fonts

Payments

Security

SEO Analysis

D58/100

Meta Tags9/15

Content10/12

Headings6/8

Technical15/25

E-E-A-T3/7

Images1/7

Links3/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

freebookcentre.netfreebookcentre.net

Free Computer books Download | Online computer ebooks | online free...

Free Computer Science ebooks,Free Computer Science ebooks download,computer science online, microsoft windows programming

Title truncated.

Title Length91 chars

Recommended: 50-60 chars (~560px / 580px)

Description Length121 chars

Recommended: 120-160 chars

Issues (2)

• Title is too long (91 chars, ~560px). Will be truncated in search results.
• Most images missing alt text (31/32) — critical for accessibility and SEO

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

9,047 URLs

robots.txt

276 rules

Allows all crawlers

Local SEO

Local Search Readiness

7/100

Poor

3 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

F35/100

Bot Access

20/25

Machine Read.

4/25

Schema Data

0/25

Citation

11/25

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:11%

Words:9,434

Token eff.:Excessive

Sections/1K:0.4

Structured Data

No Schema

Citation Readiness

Opening Summary26w

Descriptive Headingsavg 4.9w

Canonical URL

Open Graph0/3

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.

61/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

11/20

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

4/15

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.

37/100

80 mg

CO₂e / view

645.0 KB

Page Weight

80%

Cleaner Than

New Visitor

91 mg

Returning (cached)

46 mg

Annual (10K/mo)

9.6 kg

Emission Segments

Data Center

18 mg

Network

19 mg

Device

43 mg

Resource Breakdown

JavaScript

393.8 KB

Images

72.9 KB

CSS

160.1 KB

Fonts

6.2 KB

HTML

12.0 KB

Green Hosting Not Verified

Sucuri

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

35%Critical

Critical / Transactional

HTTPS

WAF

31d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

14.03.2026

Valid Until

12.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

freebookcentre.netwww.freebookcentre.net

SHA-256 Fingerprint

37:9B:8F:14:42:3C:63:E4:EF:5A:FC:A5:F6:79:D0:8F:35:47:E1:D6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=2592000, h3-29=":443"; ma=2592000

content-encoding

📦 Gzip(gzip)

content-security-policy

upgrade-insecure-requests;

content-type

text/html; charset=UTF-8

date

Tue, 12 May 2026 09:30:42 GMT

server

Sucuri/Cloudproxy

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

MX Records (1)

freebookcentre-net.mail.protection.outlook.com

Domain Information

freebookcentre.net

Domain Age

18 years

Created

14.05.2008

Expires

14.05.2028

Last Updated

05.09.2022

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

Legitimate interest basis 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.

62/100

Mobile Friendly11 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, maximum-scale=1.0

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Open Sans

WCAG Partial

61/100

Readability

/30

14/30

12px · LH 1.33

Hierarchy

/20

17/20

1.5x ratio · ✓ H1→H6

WCAG

/25

16/25

2.14:1 min contrast

Performance

/25

14/25

3 fonts · 4 req

Heading Font

Open Sans

Sans18px

Body Font

Open Sans

Sans12px

Contrast Ratio

2.14:1

20 issues

Reading Comfort

~41 CPL

Narrow lines

18px

13px

20px

18px

12px

Minor Second

Scale

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 20 elements below WCAG AA threshold (min 2.1:1).

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

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

GGoogle FontsFlesch 0

Color Palette

5 unique colors

6.09:1 AA Dark

#626264

Other· 71.40000000000002%

#ffffff

Background· 23.1%

#bcc2cb

Primary· 4%

#3364a8

Accent· 1.4%

#4a668d

Secondary· 0%

Business & Marketing Stack

2 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

pagead2.googlesyndication.com(2)fundingchoicesmessages.google.com(2)google-analytics.com(1)googletagmanager.com(1)..(1)

Website Identity

freebookcentre.net

18 years old

Location detected: 🇺🇸 United Statesvia ip

GoDaddy.com, LLC📧 Microsoft 365en

Sponsored

Last analyzed: 12 May 2026 at 09:31

Historical Analysis & Change Tracking