Tools & Wizards About Us

Report Summary

  • 49

    Performance

    Renders faster than
    67% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

four-c.co.jp

合同会社4C

Page Load Speed

18.9 sec in total

First Response

5.7 sec

Resources Loaded

13.1 sec

Page Rendered

143 ms

About Website

Click here to check amazing Four C content. Otherwise, check out these important facts you probably never knew about four-c.co.jp

合同会社4Cの公式サイト

Visit four-c.co.jp

Key Findings

We analyzed Four-c.co.jp page load time and found that the first response time was 5.7 sec and then it took 13.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

four-c.co.jp performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.7 s

0/100

10%

LCP (Largest Contentful Paint)

Value9.2 s

1/100

25%

SI (Speed Index)

Value25.2 s

0/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value9.0 s

34/100

10%

Network Requests Diagram

four-c.co.jp

5688 ms

all.css

34 ms

css

37 ms

reset.css

358 ms

slick.css

23 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that 59% of them (13 requests) were addressed to the original Four-c.co.jp, 9% (2 requests) were made to Cdn.jsdelivr.net and 9% (2 requests) were made to Cdnjs.cloudflare.com. The less responsive or slowest element that took the longest time to load (5.7 sec) belongs to the original domain Four-c.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 143.2 kB (16%)

Content Size

907.4 kB

After Optimization

764.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Four-c.co.jp main page is 907.4 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. 20% of websites need less resources to load. Images take 731.0 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 15.5 kB

  • Original 21.2 kB
  • After minification 20.9 kB
  • After compression 5.6 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 15.5 kB or 73% of the original size.

Image Optimization

-0%

Potential reduce by 1.3 kB

  • Original 731.0 kB
  • After minification 729.7 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. Four C images are well optimized though.

JavaScript Optimization

-83%

Potential reduce by 2.8 kB

  • Original 3.3 kB
  • After minification 1.4 kB
  • After compression 562 B

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 2.8 kB or 83% of the original size.

CSS Optimization

-81%

Potential reduce by 123.6 kB

  • Original 151.9 kB
  • After minification 141.5 kB
  • After compression 28.3 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. Four-c.co.jp needs all CSS files to be minified and compressed as it can save up to 123.6 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (63%)

Requests Now

19

After Optimization

7

  • Images
  • JavaScript
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Four C. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

four-c.co.jp accessibility score

78

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

four-c.co.jp 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

four-c.co.jp SEO score

93

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

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

    JA

  • Language Claimed

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Four-c.co.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it matches the claimed language. Our system also found out that Four-c.co.jp 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 Four C. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: