Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

uchebniki-online.net

Электронные учебники для школы. Скачать украинские учебники pdf.

Page Load Speed

23.2 sec in total

First Response

199 ms

Resources Loaded

20.6 sec

Page Rendered

2.4 sec

uchebniki-online.net screenshot

About Website

Click here to check amazing Uchebniki Online content for Ukraine. Otherwise, check out these important facts you probably never knew about uchebniki-online.net

Онлайн учебники - книги, содержащие основы научных знаний по учебным дисциплинам: математике, английскому, украинскому языку, биологии, географии, истории, физики, химии.

Visit uchebniki-online.net

Key Findings

We analyzed Uchebniki-online.net page load time and found that the first response time was 199 ms and then it took 23 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

uchebniki-online.net performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

83/100

10%

LCP (Largest Contentful Paint)

Value8.3 s

2/100

25%

SI (Speed Index)

Value3.9 s

82/100

10%

TBT (Total Blocking Time)

Value750 ms

39/100

30%

CLS (Cumulative Layout Shift)

Value0.903

3/100

15%

TTI (Time to Interactive)

Value10.2 s

25/100

10%

Network Requests Diagram

uchebniki-online.net

199 ms

uchebniki-online.net

403 ms

common.css

88 ms

styles.css

175 ms

engine.css

234 ms

Our browser made a total of 17 requests to load all elements on the main page. We found that 76% of them (13 requests) were addressed to the original Uchebniki-online.net, 12% (2 requests) were made to Google-analytics.com and 6% (1 request) were made to Ga-analytics.com. The less responsive or slowest element that took the longest time to load (19.6 sec) relates to the external source Ga-analytics.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 120.0 kB (30%)

Content Size

399.6 kB

After Optimization

279.6 kB

In fact, the total size of Uchebniki-online.net main page is 399.6 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. 35% of websites need less resources to load. Images take 196.1 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 116.9 kB

  • Original 131.9 kB
  • After minification 127.7 kB
  • After compression 15.0 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 116.9 kB or 89% of the original size.

Image Optimization

-0%

Potential reduce by 2 B

  • Original 196.1 kB
  • After minification 196.1 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. Uchebniki Online images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 255 B

  • Original 35.0 kB
  • After minification 35.0 kB
  • After compression 34.7 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. This website has mostly compressed JavaScripts.

CSS Optimization

-8%

Potential reduce by 2.9 kB

  • Original 36.7 kB
  • After minification 36.7 kB
  • After compression 33.8 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. Uchebniki-online.net has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 7 (54%)

Requests Now

13

After Optimization

6

The browser has sent 13 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Uchebniki Online. 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 from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

uchebniki-online.net accessibility score

95

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.

Best Practices

uchebniki-online.net 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

uchebniki-online.net 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

    RU

  • Language Claimed

    RU

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Uchebniki-online.net can be misinterpreted by Google and other search engines. Our service has detected that Russian is used on the page, and it matches the claimed language. Our system also found out that Uchebniki-online.net main page’s claimed encoding is . 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

Open Graph data is detected on the main page of Uchebniki Online. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: