Tools & Wizards About Us
killersudoku.nl screenshot

Report Summary

  • 87

    Performance

    Renders faster than
    89% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

killersudoku.nl

KillerSudoku.nl - Killer Sudoku's online oplossen of printen

Page Load Speed

1.9 sec in total

First Response

355 ms

Resources Loaded

1.5 sec

Page Rendered

114 ms

killersudoku.nl screenshot

About Website

Welcome to killersudoku.nl homepage info - get ready to check Killer Sudoku best content for Netherlands right away, or after learning these important things about killersudoku.nl

Elke dag een nieuwe Killer Sudoku, duizenden Killer Sudoku's online oplossen of printen, uitleg over de Killer Sudoku

Visit killersudoku.nl

Key Findings

We analyzed Killersudoku.nl page load time and found that the first response time was 355 ms and then it took 1.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

killersudoku.nl performance score

87

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

94/100

10%

LCP (Largest Contentful Paint)

Value1.6 s

99/100

25%

SI (Speed Index)

Value2.7 s

97/100

10%

TBT (Total Blocking Time)

Value340 ms

74/100

30%

CLS (Cumulative Layout Shift)

Value0.099

90/100

15%

TTI (Time to Interactive)

Value5.2 s

74/100

10%

Network Requests Diagram

killersudoku.nl

355 ms

killersudoku.nl

520 ms

opmaak.css

167 ms

logo.png

249 ms

print.png

254 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that 86% of them (12 requests) were addressed to the original Killersudoku.nl, 14% (2 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (520 ms) belongs to the original domain Killersudoku.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 49.5 kB (17%)

Content Size

293.4 kB

After Optimization

243.9 kB

  • HTML
  • JavaScript

In fact, the total size of Killersudoku.nl main page is 293.4 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. 15% of websites need less resources to load. Javascripts take 238.3 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 49.5 kB

  • Original 55.1 kB
  • After minification 45.3 kB
  • After compression 5.7 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. This page needs HTML code to be minified as it can gain 9.9 kB, which is 18% 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 49.5 kB or 90% of the original size.

JavaScript Optimization

-0%

Potential reduce by 21 B

  • Original 238.3 kB
  • After minification 238.3 kB
  • After compression 238.2 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. This website has mostly compressed JavaScripts.

Requests Breakdown

We found no issues to fix!

Requests Now

12

After Optimization

12

  • Images
  • JavaScript
  • CSS

The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Killer Sudoku. According to our analytics all requests are already optimized.

Network Requests Diagram

killersudoku.nl

killersudoku.nl

355 ms

killersudoku.nl

killersudoku.nl

520 ms

opmaak.css

opmaak.css

167 ms

logo.png

logo.png

249 ms

print.png

print.png

254 ms

archive.png

archive.png

255 ms

adsbygoogle.js

adsbygoogle.js

109 ms

printer.png

printer.png

265 ms

vijfsterren.png

vijfsterren.png

189 ms

voorbeeldbinair.png

voorbeeldbinair.png

253 ms

background.png

background.png

165 ms

afb_dag.php

afb_dag.php

189 ms

transparent.gif

transparent.gif

171 ms

show_ads_impl.js

show_ads_impl.js

388 ms

Accessibility Review

killersudoku.nl accessibility score

84

Accessibility Issues

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

killersudoku.nl best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Page has valid source maps

SEO Factors

killersudoku.nl SEO score

67

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    NL

  • Language Claimed

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Killersudoku.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it does not match the claimed English language. Our system also found out that Killersudoku.nl main page’s claimed encoding is iso-8859-1. 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

killersudoku.nl

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