Tools & Wizards About Us
kakuro.cc screenshot

Report Summary

  • 55

    Performance

    Renders faster than
    72% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 37% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

kakuro.cc

Kakuro Puzzles - Free Easy Kakuro for 14/October/2026

Page Load Speed

2.3 sec in total

First Response

420 ms

Resources Loaded

1.8 sec

Page Rendered

86 ms

kakuro.cc screenshot

About Website

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Key Findings

We analyzed Kakuro.cc page load time and found that the first response time was 420 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

kakuro.cc performance score

55

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.9 s

88/100

10%

LCP (Largest Contentful Paint)

Value1.9 s

98/100

25%

SI (Speed Index)

Value7.4 s

27/100

10%

TBT (Total Blocking Time)

Value1,840 ms

9/100

30%

CLS (Cumulative Layout Shift)

Value0.049

99/100

15%

TTI (Time to Interactive)

Value12.1 s

16/100

10%

Network Requests Diagram

kakuro.cc

420 ms

3colTable.css

203 ms

gradient.js

406 ms

player_v6.js

404 ms

fuse.js

647 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that 71% of them (10 requests) were addressed to the original Kakuro.cc, 7% (1 request) were made to Cdn.fuseplatform.net and 7% (1 request) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (1 sec) relates to the external source Sudoku.com.au.

Page Optimization Overview & Recommendations

Page size can be reduced by 20.4 kB (12%)

Content Size

172.1 kB

After Optimization

151.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kakuro.cc main page is 172.1 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. Only 10% of websites need less resources to load. Javascripts take 145.1 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 17.2 kB

  • Original 24.1 kB
  • After minification 23.3 kB
  • After compression 7.0 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 17.2 kB or 71% of the original size.

Image Optimization

-42%

Potential reduce by 393 B

  • Original 942 B
  • After minification 549 B

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. Obviously, Kakuro needs image optimization as it can save up to 393 B or 42% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-2%

Potential reduce by 2.2 kB

  • Original 145.1 kB
  • After minification 145.1 kB
  • After compression 142.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-33%

Potential reduce by 625 B

  • Original 1.9 kB
  • After minification 1.9 kB
  • After compression 1.3 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. Kakuro.cc needs all CSS files to be minified and compressed as it can save up to 625 B or 33% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (42%)

Requests Now

12

After Optimization

7

  • Images
  • JavaScript
  • CSS

The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kakuro. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

kakuro.cc

kakuro.cc

420 ms

3colTable.css

3colTable.css

203 ms

gradient.js

gradient.js

406 ms

player_v6.js

player_v6.js

404 ms

fuse.js

fuse.js

647 ms

adsbygoogle.js

adsbygoogle.js

120 ms

kakuro4.css

kakuro4.css

398 ms

com_styles.css

com_styles.css

472 ms

com_script.js

com_script.js

398 ms

js

js

60 ms

H5300.jpg

H5300.jpg

1008 ms

laughing.gif

laughing.gif

200 ms

tick.gif

tick.gif

200 ms

bcell2.jpg

bcell2.jpg

200 ms

Accessibility Review

kakuro.cc accessibility score

72

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Form elements do not have associated labels

Best Practices

kakuro.cc best practices score

67

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

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

kakuro.cc 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

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Kakuro.cc can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Kakuro.cc 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

kakuro.cc

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