Tools & Wizards About Us

Report Summary

  • 11

    Performance

    Renders faster than
    24% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

cero.gr.jp

特定非営利活動法人コンピュータエンターテインメントレーティング機構（公式ホームページ）

Page Load Speed

3.1 sec in total

First Response

763 ms

Resources Loaded

2.3 sec

Page Rendered

109 ms

About Website

Welcome to cero.gr.jp homepage info - get ready to check Cero best content for Russia right away, or after learning these important things about cero.gr.jp

特定非営利活動法人コンピュータエンターテインメントレーティング機構のトップページです

Visit cero.gr.jp

Key Findings

We analyzed Cero.gr.jp page load time and found that the first response time was 763 ms and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

cero.gr.jp performance score

11

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value19.0 s

0/100

10%

LCP (Largest Contentful Paint)

Value23.6 s

0/100

25%

SI (Speed Index)

Value29.5 s

0/100

10%

TBT (Total Blocking Time)

Value3,480 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.183

66/100

15%

TTI (Time to Interactive)

Value23.3 s

1/100

10%

Network Requests Diagram

cero.gr.jp

763 ms

style.css

363 ms

print.js

372 ms

urchin.js

20 ms

back.gif

187 ms

Our browser made a total of 29 requests to load all elements on the main page. We found that 93% of them (27 requests) were addressed to the original Cero.gr.jp, 7% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (924 ms) belongs to the original domain Cero.gr.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 8.3 kB (21%)

Content Size

39.9 kB

After Optimization

31.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cero.gr.jp main page is 39.9 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. Only 10% of websites need less resources to load. Images take 23.0 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 5.8 kB

  • Original 7.9 kB
  • After minification 6.9 kB
  • After compression 2.1 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 1.0 kB, which is 13% 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 5.8 kB or 74% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 23.0 kB
  • After minification 23.0 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. Cero images are well optimized though.

JavaScript Optimization

-24%

Potential reduce by 2.0 kB

  • Original 8.3 kB
  • After minification 8.2 kB
  • After compression 6.3 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 2.0 kB or 24% of the original size.

CSS Optimization

-68%

Potential reduce by 493 B

  • Original 728 B
  • After minification 612 B
  • After compression 235 B

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. Cero.gr.jp needs all CSS files to be minified and compressed as it can save up to 493 B or 68% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (68%)

Requests Now

28

After Optimization

9

  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cero. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

cero.gr.jp 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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

cero.gr.jp best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

cero.gr.jp SEO score

79

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

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

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cero.gr.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese 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 Cero.gr.jp main page’s claimed encoding is shift_jis. 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

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