Tools & Wizards About Us
jcert.co.jp screenshot

Report Summary

  • 37

    Performance

    Renders faster than
    57% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 46% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

jcert.co.jp

徹底比較 SSL/TLS｜スターフィールド＆Go Daddy両用SSL/TLS

Page Load Speed

4.5 sec in total

First Response

858 ms

Resources Loaded

3.4 sec

Page Rendered

209 ms

jcert.co.jp screenshot

About Website

Visit jcert.co.jp now to see the best up-to-date Jcert content for Japan and also check out these interesting facts you probably never knew about jcert.co.jp

世界3大 SSL/TLSにして 世界唯一の双子認証局 スターフィールド＆Go Daddy 両用SSL/TLS証明書。今なら乗換で　EV 年間17,500円（税抜）OV/DVは+30日無償ボーナス。

Visit jcert.co.jp

Key Findings

We analyzed Jcert.co.jp page load time and found that the first response time was 858 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

jcert.co.jp performance score

37

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

24/100

10%

LCP (Largest Contentful Paint)

Value10.7 s

0/100

25%

SI (Speed Index)

Value7.3 s

29/100

10%

TBT (Total Blocking Time)

Value840 ms

34/100

30%

CLS (Cumulative Layout Shift)

Value0.014

100/100

15%

TTI (Time to Interactive)

Value6.3 s

61/100

10%

Network Requests Diagram

jcert.co.jp

858 ms

import.css

356 ms

rollover.js

357 ms

reset.css

168 ms

main.css

936 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 81% of them (34 requests) were addressed to the original Jcert.co.jp, 5% (2 requests) were made to Google-analytics.com and 5% (2 requests) were made to Facebook.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Jcert.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 71.4 kB (35%)

Content Size

204.2 kB

After Optimization

132.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jcert.co.jp main page is 204.2 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. Images take 108.1 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 18.8 kB

  • Original 26.9 kB
  • After minification 23.6 kB
  • After compression 8.1 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 3.3 kB, which is 12% 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 18.8 kB or 70% of the original size.

Image Optimization

-7%

Potential reduce by 7.1 kB

  • Original 108.1 kB
  • After minification 101.0 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. Jcert images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 599 B

  • Original 18.1 kB
  • After minification 17.9 kB
  • After compression 17.5 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

-88%

Potential reduce by 45.0 kB

  • Original 51.1 kB
  • After minification 38.9 kB
  • After compression 6.1 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. Jcert.co.jp needs all CSS files to be minified and compressed as it can save up to 45.0 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (15%)

Requests Now

40

After Optimization

34

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jcert. 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

jcert.co.jp

jcert.co.jp

858 ms

import.css

import.css

356 ms

rollover.js

rollover.js

357 ms

reset.css

reset.css

168 ms

main.css

main.css

936 ms

icon_head01.gif

icon_head01.gif

167 ms

img_logo.gif

img_logo.gif

184 ms

img_logo02.gif

img_logo02.gif

356 ms

search.png

search.png

333 ms

gnavi-home.gif

gnavi-home.gif

521 ms

gnavi-about-ssl.gif

gnavi-about-ssl.gif

538 ms

gnavi-procedure.gif

gnavi-procedure.gif

364 ms

gnavi-support.gif

gnavi-support.gif

572 ms

gnavi-partner.gif

gnavi-partner.gif

518 ms

gnavi-contact.gif

gnavi-contact.gif

537 ms

130315_main-visual.jpg

130315_main-visual.jpg

740 ms

banner-01.jpg

banner-01.jpg

838 ms

btn-m04.jpg

btn-m04.jpg

897 ms

index_bnr01.gif

index_bnr01.gif

1074 ms

index_bnr02.gif

index_bnr02.gif

940 ms

index_bnr03.gif

index_bnr03.gif

945 ms

index_bnr08.gif

index_bnr08.gif

925 ms

index_bnr04_01.gif

index_bnr04_01.gif

1007 ms

index_bnr04_02.gif

index_bnr04_02.gif

1071 ms

index_infomation.gif

index_infomation.gif

1105 ms

index_infomation02.gif

index_infomation02.gif

1120 ms

border-dotted.gif

border-dotted.gif

1123 ms

banner_case02.jpg

banner_case02.jpg

1557 ms

index_boxbg01.gif

index_boxbg01.gif

1242 ms

index_seal.gif

index_seal.gif

1252 ms

site_seal.gif

site_seal.gif

1285 ms

site_seal_banner.gif

site_seal_banner.gif

1299 ms

thum02.jpg

thum02.jpg

1305 ms

footer_bar.gif

footer_bar.gif

1412 ms

ga.js

ga.js

4 ms

all.js

all.js

416 ms

__utm.gif

__utm.gif

13 ms

collect

collect

59 ms

50 ms

xd_arbiter.php

xd_arbiter.php

210 ms

xd_arbiter.php

xd_arbiter.php

417 ms

ping

ping

35 ms

Accessibility Review

jcert.co.jp accessibility score

78

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

jcert.co.jp best practices score

67

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

Browser errors were logged to the console

SEO Factors

jcert.co.jp SEO score

69

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

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 Jcert.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 Jcert.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

jcert.co.jp

Open Graph data is detected on the main page of Jcert. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: