Tools & Wizards About Us
librospdf.net screenshot

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 57% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

librospdf.net

Page Load Speed

20.6 sec in total

First Response

694 ms

Resources Loaded

10 sec

Page Rendered

9.9 sec

librospdf.net screenshot

About Website

Visit librospdf.net now to see the best up-to-date Librospdf content for Cuba and also check out these interesting facts you probably never knew about librospdf.net

Miles de libros en PDF para descargar y/o ver online gratis los podrás encontrar en LibrosPDF.net

Visit librospdf.net

Key Findings

We analyzed Librospdf.net page load time and found that the first response time was 694 ms and then it took 19.9 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

librospdf.net performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

56/100

10%

LCP (Largest Contentful Paint)

Value14.6 s

0/100

25%

SI (Speed Index)

Value9.7 s

10/100

10%

TBT (Total Blocking Time)

Value8,600 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.201

61/100

15%

TTI (Time to Interactive)

Value21.3 s

1/100

10%

Network Requests Diagram

librospdf.net

694 ms

www.librospdf.net

1138 ms

style.css

247 ms

cm

2914 ms

librospdf.png

1752 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 41% of them (16 requests) were addressed to the original Librospdf.net, 23% (9 requests) were made to Scontent-iad3-1.xx.fbcdn.net and 13% (5 requests) were made to Static.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (2.9 sec) relates to the external source Rcm-eu.amazon-adsystem.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 333.6 kB (46%)

Content Size

730.8 kB

After Optimization

397.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Librospdf.net main page is 730.8 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 380.5 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 16.9 kB

  • Original 22.4 kB
  • After minification 22.2 kB
  • After compression 5.5 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 16.9 kB or 75% of the original size.

Image Optimization

-22%

Potential reduce by 84.8 kB

  • Original 380.5 kB
  • After minification 295.7 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Librospdf needs image optimization as it can save up to 84.8 kB or 22% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-65%

Potential reduce by 138.7 kB

  • Original 213.9 kB
  • After minification 212.1 kB
  • After compression 75.2 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 138.7 kB or 65% of the original size.

CSS Optimization

-82%

Potential reduce by 93.2 kB

  • Original 114.1 kB
  • After minification 112.1 kB
  • After compression 20.8 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Librospdf.net needs all CSS files to be minified and compressed as it can save up to 93.2 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (30%)

Requests Now

37

After Optimization

26

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 37 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Librospdf. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

librospdf.net

librospdf.net

694 ms

www.librospdf.net

www.librospdf.net

1138 ms

style.css

style.css

247 ms

cm

cm

2914 ms

librospdf.png

librospdf.png

1752 ms

icon_folder.png

icon_folder.png

1615 ms

frases-celebres-de-algunos-escritores-fallecidos-antes-de-1940-6693.jpg

frases-celebres-de-algunos-escritores-fallecidos-antes-de-1940-6693.jpg

1681 ms

ebook-pdf.png

ebook-pdf.png

1615 ms

ebook-epub.png

ebook-epub.png

2076 ms

pop.js

pop.js

2003 ms

pdf.png

pdf.png

1985 ms

rtf.png

rtf.png

1981 ms

doc.png

doc.png

2001 ms

tipo_noticia.png

tipo_noticia.png

1999 ms

pdf-viewer.png

pdf-viewer.png

1959 ms

doc-viewer.png

doc-viewer.png

1959 ms

winrar.png

winrar.png

1958 ms

analytics.js

analytics.js

1768 ms

i.gif

i.gif

1767 ms

f_titulo.png

f_titulo.png

2141 ms

likebox.php

likebox.php

1864 ms

ES_title_count_44K_assoc_160x600.gif

ES_title_count_44K_assoc_160x600.gif

1156 ms

1250 ms

s11.g

s11.g

648 ms

collect

collect

535 ms

WRYTpCDr6V4.css

WRYTpCDr6V4.css

379 ms

XzwtNvyJD3B.js

XzwtNvyJD3B.js

422 ms

YhkywtmtFU0.js

YhkywtmtFU0.js

1489 ms

T-D_V7C7Ph6.js

T-D_V7C7Ph6.js

1734 ms

12042610_10153308079085857_4364498959777744952_n.jpg

12042610_10153308079085857_4364498959777744952_n.jpg

1612 ms

wMkwmq5_RAN.png

wMkwmq5_RAN.png

1100 ms

11164007_10153308084445857_2306711276335020780_n.png

11164007_10153308084445857_2306711276335020780_n.png

1483 ms

19149199_744913722362163_1876681205174342500_n.jpg

19149199_744913722362163_1876681205174342500_n.jpg

1488 ms

20799173_1551088948275240_6311275135967636136_n.jpg

20799173_1551088948275240_6311275135967636136_n.jpg

1488 ms

19399020_10213438549582070_4424413223563610809_n.jpg

19399020_10213438549582070_4424413223563610809_n.jpg

1512 ms

19146106_10209139888005295_1441963309004190455_n.jpg

19146106_10209139888005295_1441963309004190455_n.jpg

1511 ms

18557193_1674820945879567_2247053603910753542_n.jpg

18557193_1674820945879567_2247053603910753542_n.jpg

1510 ms

21077316_1780242275393536_6508913277393680830_n.jpg

21077316_1780242275393536_6508913277393680830_n.jpg

1512 ms

20108416_10213983595848212_2844232966211782094_n.jpg

20108416_10213983595848212_2844232966211782094_n.jpg

1511 ms

Accessibility Review

librospdf.net accessibility score

84

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

librospdf.net best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

librospdf.net SEO score

82

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Librospdf.net can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Librospdf.net main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

librospdf.net

Open Graph description is not detected on the main page of Librospdf. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: