Tools & Wizards About Us
coaster.jp screenshot

Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

coaster.jp

オリジナルコースター・紙コースターの印刷や作成・名入れ専門店【ART COASTER】

Page Load Speed

7.2 sec in total

First Response

546 ms

Resources Loaded

6.1 sec

Page Rendered

591 ms

coaster.jp screenshot

About Website

Click here to check amazing COASTER content for Japan. Otherwise, check out these important facts you probably never knew about coaster.jp

オリジナルコースター印刷、作成・紙コースターの名入れなどに特化した専門店【ART COASTER】フルカラー1000枚を1万円でご提供！全国の飲食関連から広告業、印刷会社、デザイナー様などコースターを作りたいあなたの力になります。

Visit coaster.jp

Key Findings

We analyzed Coaster.jp page load time and found that the first response time was 546 ms and then it took 6.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

coaster.jp performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

29/100

10%

LCP (Largest Contentful Paint)

Value9.4 s

1/100

25%

SI (Speed Index)

Value7.6 s

26/100

10%

TBT (Total Blocking Time)

Value1,120 ms

23/100

30%

CLS (Cumulative Layout Shift)

Value0.629

9/100

15%

TTI (Time to Interactive)

Value6.7 s

56/100

10%

Network Requests Diagram

coaster.jp

546 ms

coaster.jp

715 ms

www.coaster.jp

1044 ms

reset.css

173 ms

base.css

343 ms

Our browser made a total of 69 requests to load all elements on the main page. We found that 93% of them (64 requests) were addressed to the original Coaster.jp, 3% (2 requests) were made to Googletagmanager.com and 1% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (2.6 sec) belongs to the original domain Coaster.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 124.1 kB (3%)

Content Size

3.8 MB

After Optimization

3.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Coaster.jp main page is 3.8 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 3.6 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 86.5 kB

  • Original 109.8 kB
  • After minification 97.9 kB
  • After compression 23.2 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 11.9 kB, which is 11% 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 86.5 kB or 79% of the original size.

Image Optimization

-1%

Potential reduce by 22.8 kB

  • Original 3.6 MB
  • After minification 3.5 MB

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. COASTER images are well optimized though.

JavaScript Optimization

-10%

Potential reduce by 8.0 kB

  • Original 76.5 kB
  • After minification 76.5 kB
  • After compression 68.5 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

-38%

Potential reduce by 6.8 kB

  • Original 17.6 kB
  • After minification 17.6 kB
  • After compression 10.9 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. Coaster.jp needs all CSS files to be minified and compressed as it can save up to 6.8 kB or 38% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (26%)

Requests Now

65

After Optimization

48

  • Images
  • JavaScript
  • CSS

The browser has sent 65 CSS, Javascripts, AJAX and image requests in order to completely render the main page of COASTER. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

coaster.jp

coaster.jp

546 ms

coaster.jp

coaster.jp

715 ms

www.coaster.jp

www.coaster.jp

1044 ms

reset.css

reset.css

173 ms

base.css

base.css

343 ms

common.css

common.css

515 ms

index.css

index.css

527 ms

jquery-3.4.1.min.js

jquery-3.4.1.min.js

709 ms

common.js

common.js

531 ms

is.js

is.js

534 ms

index.js

index.js

542 ms

main_over.js

main_over.js

686 ms

menu.css

menu.css

700 ms

animate.css

animate.css

732 ms

ScrollTrigger.js

ScrollTrigger.js

736 ms

gfapi.js

gfapi.js

737 ms

blog.js

blog.js

855 ms

js

js

60 ms

js

js

107 ms

jquery.min.js

jquery.min.js

24 ms

instafeed.min.js

instafeed.min.js

926 ms

header_bg.gif

header_bg.gif

320 ms

header_logo_mk.png

header_logo_mk.png

320 ms

header_logo.png

header_logo.png

320 ms

header_icon_arrow.png

header_icon_arrow.png

321 ms

header_bnr_address.gif

header_bnr_address.gif

319 ms

header_icon_tel.png

header_icon_tel.png

319 ms

header_icon_line.png

header_icon_line.png

446 ms

menu_icon_recommend.png

menu_icon_recommend.png

451 ms

menu_icon_circle.png

menu_icon_circle.png

453 ms

menu_icon_square.png

menu_icon_square.png

454 ms

menu_icon_multi.png

menu_icon_multi.png

635 ms

menu_icon_plain.png

menu_icon_plain.png

451 ms

main_stn.png

main_stn.png

955 ms

main_bg01_pc.jpg

main_bg01_pc.jpg

2541 ms

bnr2_left.jpg

bnr2_left.jpg

1154 ms

bnr2_right.jpg

bnr2_right.jpg

1155 ms

news_title.png

news_title.png

629 ms

bnr_recommend.jpg

bnr_recommend.jpg

1339 ms

bnr_together.jpg

bnr_together.jpg

1354 ms

bnr_plain_pc.jpg

bnr_plain_pc.jpg

1125 ms

btn_line02.jpg

btn_line02.jpg

1296 ms

btn_mailform.jpg

btn_mailform.jpg

1330 ms

sample_bnr_stn.png

sample_bnr_stn.png

1331 ms

reason_stn.png

reason_stn.png

1468 ms

reason_stn02.png

reason_stn02.png

1506 ms

information_bnr_line.jpg

information_bnr_line.jpg

1508 ms

information_bnr_repeat.jpg

information_bnr_repeat.jpg

1517 ms

information_bnr_sample.jpg

information_bnr_sample.jpg

1535 ms

information_title_instagram.png

information_title_instagram.png

1636 ms

message_title.png

message_title.png

1683 ms

message_img_company.png

message_img_company.png

1684 ms

message_info_company.png

message_info_company.png

1693 ms

message_btn_detail_off.png

message_btn_detail_off.png

1715 ms

icon_pagetop.png

icon_pagetop.png

1807 ms

r-menu_bnr_line_off.png

r-menu_bnr_line_off.png

1799 ms

r-menu_bnr_line.png

r-menu_bnr_line.png

1690 ms

recent

recent

165 ms

2bnr_bg.gif

2bnr_bg.gif

1560 ms

contents_bg.png

contents_bg.png

1584 ms

bg_square.png

bg_square.png

1666 ms

sample_bnr_bg.jpg

sample_bnr_bg.jpg

1724 ms

massage_bg.jpg

massage_bg.jpg

2614 ms

bnr2_bg_entrusted.jpg

bnr2_bg_entrusted.jpg

1914 ms

api.json

api.json

172 ms

h2_bg_sub.jpg

h2_bg_sub.jpg

2178 ms

r-menu_icon_application.png

r-menu_icon_application.png

1706 ms

r-menu_icon_repeat.png

r-menu_icon_repeat.png

1769 ms

r-menu_icon_sample.png

r-menu_icon_sample.png

1875 ms

Accessibility Review

coaster.jp accessibility score

81

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

coaster.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

coaster.jp SEO score

92

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

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 Coaster.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 Coaster.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

coaster.jp

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