Tools & Wizards About Us

Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

onlinesudoku.eu

Online Sudoku - Free sudoku puzzle | OnlineSudoku.eu

Page Load Speed

13.4 sec in total

First Response

5.3 sec

Resources Loaded

8 sec

Page Rendered

137 ms

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 5.3 sec and then it took 8.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

onlinesudoku.eu performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

48/100

25%

SI (Speed Index)

Value10.6 s

7/100

10%

TBT (Total Blocking Time)

Value1,560 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0.131

81/100

15%

TTI (Time to Interactive)

Value15.2 s

7/100

10%

Network Requests Diagram

onlinesudoku.eu

5310 ms

onlinesudoku.eu

433 ms

default.css

102 ms

layout.css

204 ms

styles.css

300 ms

Our browser made a total of 49 requests to load all elements on the main page. We found that 27% of them (13 requests) were addressed to the original Onlinesudoku.eu, 12% (6 requests) were made to Pagead2.googlesyndication.com and 12% (6 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (5.3 sec) belongs to the original domain Onlinesudoku.eu.

Page Optimization Overview & Recommendations

Page size can be reduced by 167.1 kB (19%)

Content Size

876.9 kB

After Optimization

709.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Onlinesudoku.eu main page is 876.9 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. 65% of websites need less resources to load. Javascripts take 638.1 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 26.8 kB

  • Original 36.5 kB
  • After minification 35.5 kB
  • After compression 9.7 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 26.8 kB or 74% of the original size.

Image Optimization

-1%

Potential reduce by 1.8 kB

  • Original 196.3 kB
  • After minification 194.5 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

-22%

Potential reduce by 137.9 kB

  • Original 638.1 kB
  • After minification 638.1 kB
  • After compression 500.2 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 137.9 kB or 22% of the original size.

CSS Optimization

-9%

Potential reduce by 570 B

  • Original 6.0 kB
  • After minification 5.9 kB
  • After compression 5.5 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. Onlinesudoku.eu has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 25 (56%)

Requests Now

45

After Optimization

20

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 45 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 22 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

onlinesudoku.eu accessibility score

85

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

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

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: