Report Summary

  • 87

    Performance

    Renders faster than
    90% of other websites

  • 66

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

seibu-k.cybermail.jp

CyberMail Message System

Page Load Speed

3.4 sec in total

First Response

683 ms

Resources Loaded

2.6 sec

Page Rendered

162 ms

seibu-k.cybermail.jp screenshot

About Website

Click here to check amazing Seibu K Cyber Mail content for Japan. Otherwise, check out these important facts you probably never knew about seibu-k.cybermail.jp

Visit seibu-k.cybermail.jp

Key Findings

We analyzed Seibu-k.cybermail.jp page load time and found that the first response time was 683 ms and then it took 2.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

seibu-k.cybermail.jp performance score

87

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

96/100

10%

LCP (Largest Contentful Paint)

Value3.8 s

56/100

25%

SI (Speed Index)

Value2.9 s

95/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.8 s

89/100

10%

Network Requests Diagram

seibu-k.cybermail.jp

683 ms

login.css

168 ms

libm2k.js

501 ms

msgtw.js

526 ms

OnScreenKeyboard.js

535 ms

Our browser made a total of 36 requests to load all elements on the main page. We found that all of those requests were addressed to Seibu-k.cybermail.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (683 ms) belongs to the original domain Seibu-k.cybermail.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 98.9 kB (32%)

Content Size

310.5 kB

After Optimization

211.6 kB

In fact, the total size of Seibu-k.cybermail.jp main page is 310.5 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 184.4 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 11.4 kB

  • Original 14.9 kB
  • After minification 11.1 kB
  • After compression 3.5 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 3.9 kB, which is 26% 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 11.4 kB or 76% of the original size.

Image Optimization

-4%

Potential reduce by 7.8 kB

  • Original 184.4 kB
  • After minification 176.6 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. Seibu K Cyber Mail images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 74.5 kB

  • Original 104.5 kB
  • After minification 102.8 kB
  • After compression 30.0 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 74.5 kB or 71% of the original size.

CSS Optimization

-78%

Potential reduce by 5.3 kB

  • Original 6.7 kB
  • After minification 6.0 kB
  • After compression 1.4 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. Seibu-k.cybermail.jp needs all CSS files to be minified and compressed as it can save up to 5.3 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (14%)

Requests Now

35

After Optimization

30

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Seibu K Cyber Mail. 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.

Accessibility Review

seibu-k.cybermail.jp accessibility score

66

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

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.

Best Practices

seibu-k.cybermail.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

seibu-k.cybermail.jp SEO score

54

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

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 Seibu-k.cybermail.jp 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 Seibu-k.cybermail.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 description is not detected on the main page of Seibu K Cyber Mail. 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: