Tools & Wizards About Us
onlinesudoku.eu screenshot

Report Summary

  • 31

    Performance

    Renders faster than
    51% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

onlinesudoku.eu

Online Sudoku - Free sudoku puzzle | OnlineSudoku.eu

Page Load Speed

10 sec in total

First Response

4 sec

Resources Loaded

5.8 sec

Page Rendered

159 ms

onlinesudoku.eu screenshot

About Website

Welcome to onlinesudoku.eu homepage info - get ready to check Online Sudoku best content right away, or after learning these important things about onlinesudoku.eu

Play sudoku online for free. Thousands of various sudoku games. You can play sudoku on several difficulty levels. (very easy, easy, medium, hard, very hard, diabolic). Sudoku for web or blog and also ...

Visit onlinesudoku.eu

Key Findings

We analyzed Onlinesudoku.eu page load time and found that the first response time was 4 sec and then it took 6 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

onlinesudoku.eu performance score

31

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

44/100

10%

LCP (Largest Contentful Paint)

Value4.4 s

39/100

25%

SI (Speed Index)

Value10.7 s

7/100

10%

TBT (Total Blocking Time)

Value2,920 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.082

94/100

15%

TTI (Time to Interactive)

Value12.9 s

13/100

10%

Network Requests Diagram

onlinesudoku.eu

3984 ms

default.css

93 ms

layout.css

276 ms

styles.css

190 ms

jquery.min.js

676 ms

Our browser made a total of 65 requests to load all elements on the main page. We found that 18% of them (12 requests) were addressed to the original Onlinesudoku.eu, 12% (8 requests) were made to Apis.google.com and 8% (5 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (4 sec) belongs to the original domain Onlinesudoku.eu.

Page Optimization Overview & Recommendations

Page size can be reduced by 321.8 kB (53%)

Content Size

612.6 kB

After Optimization

290.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Onlinesudoku.eu main page is 612.6 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. 60% of websites need less resources to load. Javascripts take 499.9 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 18.9 kB

  • Original 26.0 kB
  • After minification 25.3 kB
  • After compression 7.1 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 18.9 kB or 73% of the original size.

Image Optimization

-7%

Potential reduce by 5.0 kB

  • Original 73.5 kB
  • After minification 68.5 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. Online Sudoku images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 288.0 kB

  • Original 499.9 kB
  • After minification 470.5 kB
  • After compression 211.9 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 288.0 kB or 58% of the original size.

CSS Optimization

-76%

Potential reduce by 9.9 kB

  • Original 13.1 kB
  • After minification 9.8 kB
  • After compression 3.2 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. Onlinesudoku.eu needs all CSS files to be minified and compressed as it can save up to 9.9 kB or 76% of the original size.

Requests Breakdown

Number of requests can be reduced by 37 (60%)

Requests Now

62

After Optimization

25

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Online Sudoku. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 29 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

onlinesudoku.eu

onlinesudoku.eu

3984 ms

default.css

default.css

93 ms

layout.css

layout.css

276 ms

styles.css

styles.css

190 ms

jquery.min.js

jquery.min.js

676 ms

adsbygoogle.js

adsbygoogle.js

7 ms

cookieconsent.latest.min.js

cookieconsent.latest.min.js

30 ms

all.js

all.js

35 ms

plusone.js

plusone.js

113 ms

analytics.js

analytics.js

34 ms

bg-white2.jpg

bg-white2.jpg

298 ms

sudoku-online-logo.png

sudoku-online-logo.png

329 ms

menu-main-bg.png

menu-main-bg.png

127 ms

box-title-bg.png

box-title-bg.png

222 ms

ca-pub-2057761421419175.js

ca-pub-2057761421419175.js

111 ms

zrt_lookup.html

zrt_lookup.html

152 ms

show_ads_impl.js

show_ads_impl.js

100 ms

generate.php

generate.php

190 ms

collect

collect

22 ms

collect

collect

150 ms

add-to-favorites.png

add-to-favorites.png

179 ms

227 ms

flags.png

flags.png

448 ms

xd_arbiter.php

xd_arbiter.php

88 ms

xd_arbiter.php

xd_arbiter.php

119 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

127 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

153 ms

fastbutton

fastbutton

197 ms

ads

ads

260 ms

osd.js

osd.js

43 ms

ads

ads

445 ms

sudoku.css

sudoku.css

107 ms

postmessageRelay

postmessageRelay

85 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

42 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

45 ms

like.php

like.php

105 ms

W5F8_SL0XFawnjxHGsZjJA.ttf

W5F8_SL0XFawnjxHGsZjJA.ttf

35 ms

xd_arbiter.php

xd_arbiter.php

15 ms

3193398744-postmessagerelay.js

3193398744-postmessagerelay.js

26 ms

rpc:shindig_random.js

rpc:shindig_random.js

25 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

3 ms

Of-YZRAFweH.js

Of-YZRAFweH.js

36 ms

LVx-xkvaJ0b.png

LVx-xkvaJ0b.png

24 ms

dvbs_src.js

dvbs_src.js

36 ms

abg.js

abg.js

26 ms

bst2tv3.html

bst2tv3.html

91 ms

verify.js

verify.js

66 ms

313 ms

10751623851183519624

10751623851183519624

14 ms

s

s

5 ms

m_js_controller.js

m_js_controller.js

7 ms

x_button_blue2.png

x_button_blue2.png

34 ms

googlelogo_color_112x36dp.png

googlelogo_color_112x36dp.png

41 ms

veBs87dwiCXgZb9CwomBYiW1hyWXgp0ohA3Vj3gnbUg.js

veBs87dwiCXgZb9CwomBYiW1hyWXgp0ohA3Vj3gnbUg.js

6 ms

j-1761741-1351877.js

j-1761741-1351877.js

35 ms

B9086839.130007383;dc_trk_aid=302912366;dc_trk_cid=69290829;ord=1459154197;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=

B9086839.130007383;dc_trk_aid=302912366;dc_trk_cid=69290829;ord=1459154197;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=

54 ms

AwakenSummer_160x600.html

AwakenSummer_160x600.html

22 ms

dvtp_src.js

dvtp_src.js

19 ms

html5API.js

html5API.js

38 ms

tweenjs-0.6.2.min.js

tweenjs-0.6.2.min.js

150 ms

preloadjs-0.6.2.min.js

preloadjs-0.6.2.min.js

157 ms

loader.gif

loader.gif

147 ms

dvtp_src_internal26.js

dvtp_src_internal26.js

79 ms

manifest.js

manifest.js

82 ms

t2tv7.html

t2tv7.html

60 ms

Accessibility Review

onlinesudoku.eu accessibility score

75

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

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

Best Practices

onlinesudoku.eu 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

onlinesudoku.eu SEO score

93

Search Engine Optimization Advices

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

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 Onlinesudoku.eu 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 Onlinesudoku.eu 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

onlinesudoku.eu

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