flylib.com

https://flylib.com· First analyzed 14 May 2026· Updated 14 May 2026

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flylib.com

Mobile

Sponsored

Hosting Provider

Private Layer Inc

IP Address

179.43.157.53

Site Location

🇨🇭 Switzerlandvia ip

Server Location

🇨🇭 Rümlang, Switzerland

ASN

AS51852

Organization

Private Layer Inc

Server

Nginx

Nameservers

dotnode.earth.orderbox-dns.com.dotnode.mercury.orderbox-dns.com.dotnode.venus.orderbox-dns.com.dotnode.mars.orderbox-dns.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

332 ms10%

Speed Index

432 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

327 KB

137 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Private Layer Inc

Technology Stack

7 Technologies Detected

CSS Frameworks

Analytics

Libraries

Web Servers

Languages

SEO Analysis

D47/100

Meta Tags5/15

Content11/12

Headings1/8

Technical15/25

E-E-A-T0/7

Images1/7

Links3/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

flylib.comflylib.com

Best books online library

Title Length25 chars

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

Description Length25 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (123/123) — critical for accessibility and SEO

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

19 URLs

19 sub-sitemaps

robots.txt

11 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.

Sponsored

AI & LLM Readiness

F35/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

7/25

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:20%

Words:1,590

Token eff.:Optimal

Sections/1K:0.6

Structured Data

No Schema

Citation Readiness

Opening Summary12w

Descriptive Headingsavg 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...

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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.

59/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

7/20

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

6/15

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.

42/100

40 mg

CO₂e / view

327.1 KB

Page Weight

90%

Cleaner Than

New Visitor

46 mg

Returning (cached)

23 mg

Annual (10K/mo)

4.8 kg

Emission Segments

Data Center

9 mg

Network

10 mg

Device

22 mg

Resource Breakdown

JavaScript

31.8 KB

Images

272.2 KB

CSS

3.6 KB

HTML

11.2 KB

Other

8.3 KB

Green Hosting Not Verified

Private Layer Inc

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

56%Poor

Interactive

HTTPS

No WAF

37d

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/2

Valid From

23.03.2026

Valid Until

21.06.2026

Subject Alternative Names (3)

amp.flylib.comflylib.comwww.flylib.com

SHA-256 Fingerprint

4D:7B:A1:2D:4C:30:53:38:59:AB:5A:17:75:5E:6F:4B:66:F6:CE:56...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-security-policy

img-src https: data:; upgrade-insecure-requests

content-type

text/html; charset=UTF-8

date

Thu, 14 May 2026 23:58:22 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

pragma

no-cache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

flylib.com

Domain Age

16y 10m

Created

02.07.2009

Expires

02.07.2026

Last Updated

03.07.2025

Registrar

PDR Ltd. d/b/a PublicDomainRegistry.com

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

64/100

Mobile Friendly5 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

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Arial

WCAG Partial

65/100

Readability

/30

19/30

15px · LH 1.60

Hierarchy

/20

7/20

WCAG

/25

19/25

2.23:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Arial

Sans

Body Font

Arial

Sans15px

Contrast Ratio

2.23:1

1 issue

Reading Comfort

~41 CPL

Narrow lines

18px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 2/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 2.2:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 2

Color Palette

8 unique colors

4.73:1 AA Light

#ffffff

Background· 74%

#727378

Other· 1.5%

#576475

Primary· 7.4%

#f0efec

Secondary· 7.3999999999999995%

#d1cdc3

Border· 4.3%

#673e48

Secondary· 1.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)cse.google.com(2)googletagmanager.com(2)google.com(1)google-analytics.com(1)

Website Identity

flylib.com

16 years old

Location detected: 🇨🇭 Switzerlandvia ip

PDR Ltd. d/b/a PublicDomainRegistry.comen

Sponsored

Last analyzed: 14 May 2026 at 23:59

Historical Analysis & Change Tracking