freecomputerbooks.com

https://freecomputerbooks.com· First analyzed 06 May 2026· Updated 06 May 2026

Export

Mobile

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Hosting Provider

RimuHosting

IP Address

74.50.48.246

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Dallas, United States

ASN

AS17378

Organization

RimuHosting

Server

Apache

Nameservers

ns2.rimuhosting.com.ns1.rimuhosting.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

766 ms10%

Speed Index

996 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

661 KB

93 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

RimuHosting

Technology Stack

11 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Advertising

Google Ads Google AdSense

Languages

PHPv5.4.16 Pythonv3.9

Libraries

CSS Frameworks

Fonts

Social

Web Servers

SEO Analysis

D43/100

Meta Tags7/15

Content6/12

Headings2/8

Technical12/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile2/4

Indexability3/3

freecomputerbooks.comfreecomputerbooks.com

Free Computer, Programming, Mathematics, Technical Books, Lecture N...

Links to Free Programming, Computer, Mathematics, Technical eBooks and Lecture Notes all over the World, Directory of online free programming, computer, engi...

Title truncated. Description truncated.

Title Length85 chars

Recommended: 50-60 chars (~519px / 580px)

Description Length294 chars

Recommended: 120-160 chars

Issues (3)

• Title is too long (85 chars, ~519px). Will be truncated in search results.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (48/48) — critical for accessibility and SEO

13 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

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

F33/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

6/25

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:1%

Words:1,046

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary

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 (12)

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.

44/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

6/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

7/15

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

7/15

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.

4 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.

28/100

82 mg

CO₂e / view

661.4 KB

Page Weight

80%

Cleaner Than

New Visitor

94 mg

Returning (cached)

47 mg

Annual (10K/mo)

9.8 kg

Emission Segments

Data Center

18 mg

Network

20 mg

Device

44 mg

Resource Breakdown

JavaScript

456.6 KB

Images

86.4 KB

CSS

40.4 KB

Fonts

8.1 KB

HTML

35.7 KB

Other

34.3 KB

Green Hosting Not Verified

RimuHosting

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

70d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

17.04.2026

Valid Until

16.07.2026

Subject Alternative Names (1)

freecomputerbooks.com

SHA-256 Fingerprint

FB:8F:B4:DC:45:1A:88:B1:F0:B8:B8:0B:19:33:1E:4B:C4:C1:49:85...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

Keep-Alive

content-type

text/html; charset=ISO-639-2

date

Wed, 06 May 2026 14:18:11 GMT

keep-alive

timeout=5, max=100

server

Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips PHP/5.4.16 mod_wsg...

transfer-encoding

chunked

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

freecomputerbooks.com

Domain Information

freecomputerbooks.com

Domain Age

25y 7m

Created

01.10.2000

Expires

01.10.2028

Last Updated

06.01.2023

Registrar

eNom, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

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.

55/100

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

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

verdana

WCAG Partial

43/100

Readability

/30

9/30

11px · LH --

Hierarchy

/20

9/20

WCAG

/25

14/25

3.22:1 min contrast

Performance

/25

11/25

2 fonts · 4 req

Heading Font

verdana

Body Font

verdana

Sans11px

Contrast Ratio

3.22:1

10 issues

Reading Comfort

~93 CPL

Wide lines

11px

❌ Critical: 11px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Wide lines: ~93 chars/line. Use max-width: 65ch for comfortable reading.

⚠️ Hard to read: Flesch score 32/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 3.2:1).

✅ Lean font stack: 2 font families keeps load times fast.

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

GGoogle Fonts Buy on MyFontsFlesch 33

Color Palette

9 unique colors

Light

#ffffff

Background· 46.7%

#5f7dac

Primary· 12.7%

#41629a

Secondary· 6.9%

#3f528b

Secondary· 6.9%

#d8e3eb

Secondary· 6.6%

#83aeab

Secondary· 5.6%

#eff3ee

Secondary· 4.1%

#253c82

Accent· 4%

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

26 Resources

Scripts

Styles

Async

Defer

Top Script Sources

pagead2.googlesyndication.com(5)fundingchoicesmessages.google.com(4)contextual.media.net(3)local(2)google-analytics.com(1)

Website Identity

freecomputerbooks.com

25 years old

Location detected: 🇺🇸 United Statesvia ip

eNom, LLCen

Social Profiles

X (Twitter)

Sponsored

Last analyzed: 06 May 2026 at 14:18

Historical Analysis & Change Tracking