Tools & Wizards About Us
jelsystem.co.jp screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 60% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 91

    SEO

    Google-friendlier than
    71% of websites

jelsystem.co.jp

省エネ・省コスト製品、ＳＳＲ関連製品 | 株式会社ジェルシステム

Page Load Speed

30.3 sec in total

First Response

3.4 sec

Resources Loaded

26.7 sec

Page Rendered

219 ms

jelsystem.co.jp screenshot

About Website

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

地球環境にやさしい省エネ照明シリーズや省コストを実現する電子ブレーカーなどの省エネ関連製品、ソリッドステートリレー（SSR）や電力調整器などの制御関連製品は株式会社ジェルシステムにお任せください。

Visit jelsystem.co.jp

Key Findings

We analyzed Jelsystem.co.jp page load time and found that the first response time was 3.4 sec and then it took 26.9 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 3 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

jelsystem.co.jp performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

16/100

10%

LCP (Largest Contentful Paint)

Value14.8 s

0/100

25%

SI (Speed Index)

Value22.9 s

0/100

10%

TBT (Total Blocking Time)

Value1,570 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0.13

82/100

15%

TTI (Time to Interactive)

Value33.4 s

0/100

10%

Network Requests Diagram

jelsystem.co.jp

3419 ms

index.css

3868 ms

swfobject.js

1681 ms

ga.js

47 ms

snavi_bg.jpg

366 ms

Our browser made a total of 53 requests to load all elements on the main page. We found that 96% of them (51 requests) were addressed to the original Jelsystem.co.jp, 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (19.9 sec) belongs to the original domain Jelsystem.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 24.3 kB (15%)

Content Size

161.8 kB

After Optimization

137.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jelsystem.co.jp main page is 161.8 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 113.6 kB which makes up the majority of the site volume.

HTML Optimization

-67%

Potential reduce by 9.9 kB

  • Original 14.6 kB
  • After minification 14.0 kB
  • After compression 4.8 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 9.9 kB or 67% of the original size.

Image Optimization

-1%

Potential reduce by 1.7 kB

  • Original 113.6 kB
  • After minification 111.9 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. Jelsystem images are well optimized though.

JavaScript Optimization

-20%

Potential reduce by 4.8 kB

  • Original 24.0 kB
  • After minification 23.8 kB
  • After compression 19.2 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 4.8 kB or 20% of the original size.

CSS Optimization

-84%

Potential reduce by 8.0 kB

  • Original 9.6 kB
  • After minification 7.9 kB
  • After compression 1.6 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. Jelsystem.co.jp needs all CSS files to be minified and compressed as it can save up to 8.0 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (27%)

Requests Now

49

After Optimization

36

  • Images
  • JavaScript
  • CSS

The browser has sent 49 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jelsystem. 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

jelsystem.co.jp

jelsystem.co.jp

3419 ms

index.css

index.css

3868 ms

swfobject.js

swfobject.js

1681 ms

ga.js

ga.js

47 ms

snavi_bg.jpg

snavi_bg.jpg

366 ms

snavi_ja.jpg

snavi_ja.jpg

375 ms

snavi_en.jpg

snavi_en.jpg

356 ms

snavi01.jpg

snavi01.jpg

407 ms

snavi02.jpg

snavi02.jpg

422 ms

snavi03.jpg

snavi03.jpg

425 ms

snavi04.jpg

snavi04.jpg

568 ms

snavi05.jpg

snavi05.jpg

11230 ms

gnavi_logo.jpg

gnavi_logo.jpg

3346 ms

gnavi01.jpg

gnavi01.jpg

2234 ms

gnavi02.jpg

gnavi02.jpg

9685 ms

gnavi03.jpg

gnavi03.jpg

6221 ms

gnavi04.jpg

gnavi04.jpg

4470 ms

gnavi05.jpg

gnavi05.jpg

2403 ms

h1.jpg

h1.jpg

19857 ms

sfimg.jpg

sfimg.jpg

19859 ms

jelbanner2.jpg

jelbanner2.jpg

7053 ms

top_eseei.jpg

top_eseei.jpg

7260 ms

conb_l03.jpg

conb_l03.jpg

7261 ms

conb_c03.jpg

conb_c03.jpg

8448 ms

conb_l01.jpg

conb_l01.jpg

8171 ms

conb_c01.jpg

conb_c01.jpg

8402 ms

conb_r01.jpg

conb_r01.jpg

8641 ms

conb_l02.jpg

conb_l02.jpg

9240 ms

conb_c02.jpg

conb_c02.jpg

8876 ms

conb_r02.jpg

conb_r02.jpg

10462 ms

conr_bg.jpg

conr_bg.jpg

9888 ms

conl_h2.jpg

conl_h2.jpg

9973 ms

conl_dt.jpg

conl_dt.jpg

11245 ms

conr_h3.jpg

conr_h3.jpg

11240 ms

conr_li.jpg

conr_li.jpg

10618 ms

com_a.jpg

com_a.jpg

10934 ms

conb_bg.jpg

conb_bg.jpg

11186 ms

eco_conr_h2.jpg

eco_conr_h2.jpg

19823 ms

top_eseet.jpg

top_eseet.jpg

12239 ms

dt07.jpg

dt07.jpg

13715 ms

__utm.gif

__utm.gif

29 ms

dt08.jpg

dt08.jpg

12122 ms

conb_bottom.jpg

conb_bottom.jpg

12167 ms

conr_h2.jpg

conr_h2.jpg

15075 ms

conb_textbg.jpg

conb_textbg.jpg

14228 ms

dt01.jpg

dt01.jpg

14816 ms

dt02.jpg

dt02.jpg

18529 ms

dt03.jpg

dt03.jpg

18669 ms

dt04.jpg

dt04.jpg

14020 ms

dt05.jpg

dt05.jpg

14504 ms

dt06.jpg

dt06.jpg

14332 ms

footer_bg.jpg

footer_bg.jpg

13776 ms

pagetop.jpg

pagetop.jpg

13827 ms

Accessibility Review

jelsystem.co.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

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

Best Practices

jelsystem.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

jelsystem.co.jp SEO score

91

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

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    N/A

  • Encoding

    EUC-JP

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jelsystem.co.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 Jelsystem.co.jp main page’s claimed encoding is euc-jp. 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

jelsystem.co.jp

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