zendalibros.com

https://zendalibros.com· First analyzed 28 Apr 2026· Updated 28 Apr 2026

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zendalibros.com

Mobile

Sponsored

Hosting Provider

AXARNET COMUNICACIONES, S.L

IP Address

31.24.154.237

Site Location

🇪🇸 Spainvia ip

Server Location

🇪🇸 Madrid, Spain

ASN

AS50926

Organization

AXARNET COMUNICACIONES, S.L

Server

Nginx

Nameservers

ns1.serviciodns.es.ns3.serviciodns.es.ns2.serviciodns.es.

Performance

Core Web Vitals

Weight

First Contentful Paint

768 ms10%

Speed Index

998 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

424 KB

106 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.4.3

cms

urbanmag-v1-05-childCustom

Technology Stack

22 Technologies Detected

Plugins

Zioamazon Audioigniter Search By Algolia Instant Relevant Results Add To Any Timeline Twitter Feed Simple Blog Authors Widget

Analytics

Libraries

UI Components

Other

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

Social

Web Servers

Languages

SEO Analysis

B76/100

Meta Tags9/15

Content10/12

Headings3/8

Technical24/25

E-E-A-T3/7

Images5/7

Links2/5

URL5/5

Social4/5

Freshness4/4

Mobile4/4

Indexability3/3

zendalibros.comzendalibros.com

Zenda · Autores, libros & cía

¿Sería posible crear una especie de lugar o plaza común, de legión extranjera donde a nadie se le preguntara sino por libros y literatura?, Pérez-Reverte.

Title Length29 chars

Recommended: 50-60 chars (~173px / 580px)

Description Length154 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

39 URLs

39 sub-sitemaps

robots.txt

4 rules

Allows all crawlers

Local SEO

Local Search Readiness

15/100

Poor

5 11 1

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D48/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

4/25

Citation

16/25

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

nav

Text ratio:3%

Words:1,243

Token eff.:Optimal

Depth:1/5

Structured Data

89 JSON-LD

WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary871w

Descriptive Headingsavg 6.1w

Canonical URL

Open Graph2/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

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.

63/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

13/20

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

Forms & Inputs

10/15

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

9/15

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

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

5 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.

51/100

52 mg

CO₂e / view

423.9 KB

Page Weight

90%

Cleaner Than

New Visitor

60 mg

Returning (cached)

30 mg

Annual (10K/mo)

6.3 kg

Emission Segments

Data Center

12 mg

Network

13 mg

Device

28 mg

Resource Breakdown

JavaScript

108.5 KB

Images

96.1 KB

Fonts

2.4 KB

HTML

216.9 KB

Green Hosting Not Verified

AXARNET COMUNICACIONES, S.L

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

56%Poor

Interactive

HTTPS

No WAF

166d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

Valid From

27.03.2026

Valid Until

11.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.zendalibros.comzendalibros.com

SHA-256 Fingerprint

25:58:BC:91:E6:DC:A1:B4:D0:AC:CB:5C:32:F0:7B:78:05:85:F0:B2...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-type

text/html; charset=UTF-8

date

Tue, 28 Apr 2026 07:44:14 GMT

last-modified

Tue, 28 Apr 2026 07:30:29 GMT

server

nginx/1.20.1

strict-transport-security

max-age=31536000; includeSubDomains

x-content-type-options

nosniff

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mx2.redunda.com

mx.redunda.com

Domain Information

zendalibros.com

Domain Age

10y 5m

Created

06.11.2015

Expires

06.11.2026

Last Updated

08.10.2025

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.

66/100

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

initial-scale=1.0

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Noto Serif

WCAG Partial

66/100

Readability

/30

23/30

16px · LH 1.70

Hierarchy

/20

8/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

18/25

2 fonts · 1 req

Heading Font

Noto Serif

Serif

Body Font

Noto Serif

Serif16px

Contrast Ratio

1:1

6 issues

Reading Comfort

~39 CPL

Narrow lines

21px

19px

30px

16px

Major Third

Scale

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

❌ Very complex text: Flesch score 22/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 1.0:1).

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

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

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

GGoogle Fonts Buy on MyFontsFlesch 22

Color Palette

9 unique colors

20.87:1 AAA Light

#ffffff

Background· 52.5%

#010101

Text· 6.2%

#37433a

Primary· 4.7%

#e9ebed

Secondary· 1.7%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Social Media

Twitter/X WidgetsFree

AddThisFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.zendalibros.com(11)googletagmanager.com(3)assets.adobedtm.com(2)es-config.sensic.net(1)google-analytics.com(1)

Website Identity

Firmas

SiteNavigationElement

¿Sería posible crear una especie de lugar o plaza común, de legión extranjera donde a nadie se le preguntara sino por libros y literatura?, Pérez-Reverte.

contacto@zendalibros.com

www.zendalibros.com/cia/

10 years old

Location detected: 🇪🇸 Spainvia ip

eNom, LLCes

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube

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Last analyzed: 28 Apr 2026 at 07:44

Historical Analysis & Change Tracking