Tools & Wizards About Us
vlebooks.com screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

vlebooks.com

VLeBooks - Logon

Page Load Speed

2.4 sec in total

First Response

88 ms

Resources Loaded

2.2 sec

Page Rendered

79 ms

vlebooks.com screenshot

About Website

Welcome to vlebooks.com homepage info - get ready to check V Le Books best content for United Kingdom right away, or after learning these important things about vlebooks.com

The VleBooks online learning platform provides ebooks to Schools, Universities, and Libraries.

Visit vlebooks.com

Key Findings

We analyzed Vlebooks.com page load time and found that the first response time was 88 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

vlebooks.com performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value16.8 s

0/100

10%

LCP (Largest Contentful Paint)

Value17.4 s

0/100

25%

SI (Speed Index)

Value16.8 s

0/100

10%

TBT (Total Blocking Time)

Value1,770 ms

10/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value20.2 s

2/100

10%

Network Requests Diagram

88 ms

js

49 ms

jquery.min.js

242 ms

vlecss.min.css

325 ms

kendo.common-bootstrap.min.css

499 ms

Our browser made a total of 29 requests to load all elements on the main page. We found that 93% of them (27 requests) were addressed to the original Vlebooks.com, 3% (1 request) were made to Googletagmanager.com and 3% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (834 ms) belongs to the original domain Vlebooks.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 692.2 kB (28%)

Content Size

2.5 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vlebooks.com main page is 2.5 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Javascripts take 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 27.6 kB

  • Original 34.2 kB
  • After minification 29.5 kB
  • After compression 6.6 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. This page needs HTML code to be minified as it can gain 4.7 kB, which is 14% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 27.6 kB or 81% of the original size.

Image Optimization

-17%

Potential reduce by 2.5 kB

  • Original 14.7 kB
  • After minification 12.2 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, V Le Books needs image optimization as it can save up to 2.5 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-26%

Potential reduce by 471.4 kB

  • Original 1.8 MB
  • After minification 1.8 MB
  • After compression 1.4 MB

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 471.4 kB or 26% of the original size.

CSS Optimization

-31%

Potential reduce by 190.7 kB

  • Original 617.3 kB
  • After minification 617.3 kB
  • After compression 426.5 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. Vlebooks.com needs all CSS files to be minified and compressed as it can save up to 190.7 kB or 31% of the original size.

Requests Breakdown

Number of requests can be reduced by 18 (67%)

Requests Now

27

After Optimization

9

  • Images
  • JavaScript
  • CSS

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of V Le Books. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

88 ms

js

js

49 ms

jquery.min.js

jquery.min.js

242 ms

vlecss.min.css

vlecss.min.css

325 ms

kendo.common-bootstrap.min.css

kendo.common-bootstrap.min.css

499 ms

kendo.bootstrap-v4.min.css

kendo.bootstrap-v4.min.css

666 ms

kendo.common.min.css

kendo.common.min.css

523 ms

kendo.silver.min.css

kendo.silver.min.css

430 ms

jszip.min.js

jszip.min.js

430 ms

kendo.all.min.js

kendo.all.min.js

720 ms

kendo.aspnetmvc.min.js

kendo.aspnetmvc.min.js

546 ms

kendo.culture.en-GB.min.js

kendo.culture.en-GB.min.js

545 ms

KendoHelpers.js

KendoHelpers.js

584 ms

kendo.captcha.min.js

kendo.captcha.min.js

600 ms

css

css

34 ms

all.min.css

all.min.css

834 ms

vleauth.min.js

vleauth.min.js

599 ms

modernizr.min.js

modernizr.min.js

707 ms

bootstrap.min.js

bootstrap.min.js

708 ms

vlebook.min.js

vlebook.min.js

707 ms

AjaxHelpers.js

AjaxHelpers.js

832 ms

Logo_White_250x46.png

Logo_White_250x46.png

175 ms

ssoShibbsmall.png

ssoShibbsmall.png

134 ms

ssoAthenssmall.png

ssoAthenssmall.png

135 ms

ssoRMUnifysmall.png

ssoRMUnifysmall.png

134 ms

ssoO365small.png

ssoO365small.png

135 ms

ssoGooglesmall.png

ssoGooglesmall.png

135 ms

ssoLCFsmall.png

ssoLCFsmall.png

135 ms

fa-brands-400.ttf

fa-brands-400.ttf

83 ms

Accessibility Review

vlebooks.com accessibility score

100

Accessibility Issues

Best Practices

vlebooks.com best practices score

75

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

Page has valid source maps

SEO Factors

vlebooks.com SEO score

100

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vlebooks.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Vlebooks.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

vlebooks.com

Open Graph description is not detected on the main page of V Le Books. 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: