Tools & Wizards About Us
sudoku.ws screenshot

Report Summary

  • 17

    Performance

    Renders faster than
    33% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

sudoku.ws

Page Load Speed

5 sec in total

First Response

249 ms

Resources Loaded

4.4 sec

Page Rendered

372 ms

sudoku.ws screenshot

About Website

Click here to check amazing Sudoku content for United States. Otherwise, check out these important facts you probably never knew about sudoku.ws

The Sudoku website contains online (interactive) and printable sudoku puzzles, ordered by difficulty level.

Visit sudoku.ws

Key Findings

We analyzed Sudoku.ws page load time and found that the first response time was 249 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

sudoku.ws performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

24/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

41/100

25%

SI (Speed Index)

Value11.3 s

5/100

10%

TBT (Total Blocking Time)

Value31,070 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.377

28/100

15%

TTI (Time to Interactive)

Value42.6 s

0/100

10%

Network Requests Diagram

sudoku.ws

249 ms

www.sudoku.ws

391 ms

screen.css

90 ms

jquery.min.js

23 ms

jquery-ui.min.js

29 ms

Our browser made a total of 66 requests to load all elements on the main page. We found that 36% of them (24 requests) were addressed to the original Sudoku.ws, 15% (10 requests) were made to Tpc.googlesyndication.com and 11% (7 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1.7 sec) relates to the external source Googletagservices.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 222.0 kB (46%)

Content Size

481.0 kB

After Optimization

259.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sudoku.ws main page is 481.0 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. 50% of websites need less resources to load. Javascripts take 348.2 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 19.9 kB

  • Original 25.2 kB
  • After minification 24.9 kB
  • After compression 5.4 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 19.9 kB or 79% of the original size.

Image Optimization

-2%

Potential reduce by 1.6 kB

  • Original 102.5 kB
  • After minification 100.9 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. Sudoku images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 200.4 kB

  • Original 348.2 kB
  • After minification 348.1 kB
  • After compression 147.8 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 200.4 kB or 58% of the original size.

CSS Optimization

-4%

Potential reduce by 185 B

  • Original 5.1 kB
  • After minification 5.1 kB
  • After compression 4.9 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. Sudoku.ws has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 37 (67%)

Requests Now

55

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 55 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 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 25 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

sudoku.ws

sudoku.ws

249 ms

www.sudoku.ws

www.sudoku.ws

391 ms

screen.css

screen.css

90 ms

jquery.min.js

jquery.min.js

23 ms

jquery-ui.min.js

jquery-ui.min.js

29 ms

sudoku.css

sudoku.css

181 ms

sudoku.min.js

sudoku.min.js

274 ms

adsbygoogle.js

adsbygoogle.js

69 ms

global-ck.min.js

global-ck.min.js

279 ms

sudoku.png

sudoku.png

150 ms

alert.min.css

alert.min.css

93 ms

theme.css

theme.css

92 ms

alert.min.js

alert.min.js

146 ms

dlx.js

dlx.js

98 ms

zrt_lookup.html

zrt_lookup.html

32 ms

show_ads_impl.js

show_ads_impl.js

111 ms

alert.min.css

alert.min.css

118 ms

theme.css

theme.css

117 ms

alert.min.js

alert.min.js

114 ms

cookie.js

cookie.js

60 ms

integrator.js

integrator.js

71 ms

ads

ads

464 ms

close.png

close.png

97 ms

info.png

info.png

96 ms

confirm.png

confirm.png

95 ms

warning.png

warning.png

97 ms

error.png

error.png

166 ms

ads

ads

556 ms

dlx.js

dlx.js

169 ms

ads

ads

571 ms

print.css

print.css

90 ms

ubuntumono-regular.woff

ubuntumono-regular.woff

192 ms

ubuntumono-bold.woff

ubuntumono-bold.woff

190 ms

digital.woff

digital.woff

96 ms

85254efcadaacab5fed344cbf203b7e7.js

85254efcadaacab5fed344cbf203b7e7.js

41 ms

load_preloaded_resource.js

load_preloaded_resource.js

53 ms

c471d9b7113df21a6cf58632ab968748.js

c471d9b7113df21a6cf58632ab968748.js

54 ms

abg_lite.js

abg_lite.js

84 ms

window_focus.js

window_focus.js

93 ms

qs_click_protection.js

qs_click_protection.js

93 ms

rx_lidar.js

rx_lidar.js

1747 ms

042791247ab671b2831aa311d6583330.js

042791247ab671b2831aa311d6583330.js

73 ms

icon.png

icon.png

25 ms

s

s

21 ms

2076313506083323656

2076313506083323656

16 ms

downsize_200k_v1

downsize_200k_v1

15 ms

reactive_library.js

reactive_library.js

44 ms

integrator.js

integrator.js

61 ms

zrt_lookup.html

zrt_lookup.html

55 ms

css2

css2

68 ms

downsize_200k_v1

downsize_200k_v1

42 ms

feedback_grey600_24dp.png

feedback_grey600_24dp.png

32 ms

interstitial_ad_frame.js

interstitial_ad_frame.js

32 ms

one_click_handler_one_afma.js

one_click_handler_one_afma.js

26 ms

18071902633833477543

18071902633833477543

89 ms

settings_grey600_24dp.png

settings_grey600_24dp.png

16 ms

KFOlCnqEu92Fr1MmWUlvAA.woff

KFOlCnqEu92Fr1MmWUlvAA.woff

23 ms

KFOmCnqEu92Fr1Me5g.woff

KFOmCnqEu92Fr1Me5g.woff

31 ms

css

css

490 ms

css

css

488 ms

activeview

activeview

241 ms

activeview

activeview

156 ms

YrdBSjzfIHcYhYLmavhSyO_EhBrLUWpx5ykdL7H9Kqg.js

YrdBSjzfIHcYhYLmavhSyO_EhBrLUWpx5ykdL7H9Kqg.js

14 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpy8.woff

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpy8.woff

13 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpy8.woff

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpy8.woff

13 ms

KFOlCnqEu92Fr1MmWUlfBBc-.woff

KFOlCnqEu92Fr1MmWUlfBBc-.woff

106 ms

Accessibility Review

sudoku.ws accessibility score

82

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

Best Practices

sudoku.ws 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

sudoku.ws SEO score

92

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

    N/A

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sudoku.ws 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), while the claimed language is English. Our system also found out that Sudoku.ws 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

sudoku.ws

Open Graph description is not detected on the main page of Sudoku. 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: