Tools & Wizards About Us
coincheck.com screenshot

Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 67

    Accessibility

    Visual factors better than
    that of 32% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 71

    SEO

    Google-friendlier than
    30% of websites

coincheck.com

The easiest way to buy and sell Bitcoin and cryptocurrency. | Coincheck

Page Load Speed

2.2 sec in total

First Response

10 ms

Resources Loaded

1.4 sec

Page Rendered

778 ms

coincheck.com screenshot

About Website

Visit coincheck.com now to see the best up-to-date Coincheck content for Japan and also check out these interesting facts you probably never knew about coincheck.com

Trading value No.1※1 The number of app users No.1※2※1 No.1 Bitcoin trade volume in Japan! According to jpbitcoin.com (2017 yearly BTC spot trade volume) ※2 According to the research conducted by App A...

Visit coincheck.com

Key Findings

We analyzed Coincheck.com page load time and found that the first response time was 10 ms and then it took 2.2 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

coincheck.com performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.0 s

4/100

10%

LCP (Largest Contentful Paint)

Value10.8 s

0/100

25%

SI (Speed Index)

Value7.2 s

29/100

10%

TBT (Total Blocking Time)

Value1,380 ms

16/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value15.9 s

6/100

10%

Network Requests Diagram

coincheck.com

10 ms

coincheck.com

339 ms

base-cd6dd2757b72fcdee53d5b3c67f64907c034e9f53cd5c685a946460bbd6d2e14.css.gz

86 ms

mainpage-11f8dff7cde567255c4a482eded9a21a0f58e980f3d2795cebc6b5fcd3d7e57b.css.gz

81 ms

base-9acd4cb9b93c3ebdc4f99734cff1882f4e3d8ca6d0bafb8f46204221a3cd351b.js.gz

112 ms

Our browser made a total of 49 requests to load all elements on the main page. We found that 37% of them (18 requests) were addressed to the original Coincheck.com, 37% (18 requests) were made to Assets.coincheck.com and 6% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (870 ms) relates to the external source B92.yahoo.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 99.2 kB (10%)

Content Size

955.2 kB

After Optimization

856.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Coincheck.com main page is 955.2 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. 70% of websites need less resources to load. Images take 485.5 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 68.8 kB

  • Original 98.5 kB
  • After minification 94.3 kB
  • After compression 29.6 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 68.8 kB or 70% of the original size.

Image Optimization

-6%

Potential reduce by 30.3 kB

  • Original 485.5 kB
  • After minification 455.1 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. Coincheck images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 68 B

  • Original 317.2 kB
  • After minification 317.2 kB
  • After compression 317.1 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

-0%

Potential reduce by 17 B

  • Original 54.1 kB
  • After minification 54.1 kB
  • After compression 54.1 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. Coincheck.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 13 (28%)

Requests Now

46

After Optimization

33

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Coincheck. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

coincheck.com

coincheck.com

10 ms

coincheck.com

coincheck.com

339 ms

base-cd6dd2757b72fcdee53d5b3c67f64907c034e9f53cd5c685a946460bbd6d2e14.css.gz

base-cd6dd2757b72fcdee53d5b3c67f64907c034e9f53cd5c685a946460bbd6d2e14.css.gz

86 ms

mainpage-11f8dff7cde567255c4a482eded9a21a0f58e980f3d2795cebc6b5fcd3d7e57b.css.gz

mainpage-11f8dff7cde567255c4a482eded9a21a0f58e980f3d2795cebc6b5fcd3d7e57b.css.gz

81 ms

base-9acd4cb9b93c3ebdc4f99734cff1882f4e3d8ca6d0bafb8f46204221a3cd351b.js.gz

base-9acd4cb9b93c3ebdc4f99734cff1882f4e3d8ca6d0bafb8f46204221a3cd351b.js.gz

112 ms

vue.lib-d91b4ece40f1c28bee259000d52dd5a7ed737ad7f15c6c82e9bc9c4f0a0d2801.js.gz

vue.lib-d91b4ece40f1c28bee259000d52dd5a7ed737ad7f15c6c82e9bc9c4f0a0d2801.js.gz

136 ms

css

css

69 ms

css

css

110 ms

s_retargeting.js

s_retargeting.js

870 ms

edge.js

edge.js

247 ms

builder.js

builder.js

290 ms

vue.app-0ef4d8a3d31b85955a5fd891fece898d7ec824b1bbc90f44c26b3571656add1d.js.gz

vue.app-0ef4d8a3d31b85955a5fd891fece898d7ec824b1bbc90f44c26b3571656add1d.js.gz

150 ms

analytics.js

analytics.js

48 ms

gtm.js

gtm.js

89 ms

fbevents.js

fbevents.js

46 ms

uwt.js

uwt.js

38 ms

linkid.js

linkid.js

7 ms

collect

collect

15 ms

adsct

adsct

49 ms

adsct

adsct

99 ms

logo.svg

logo.svg

127 ms

img_sp_ios_android_2020_02.png

img_sp_ios_android_2020_02.png

164 ms

icon_buysell_2019.svg

icon_buysell_2019.svg

166 ms

icon_sendreceive.svg

icon_sendreceive.svg

131 ms

img_sp_send_receive_2020_02.png

img_sp_send_receive_2020_02.png

132 ms

img_pc_trade_2020_02.png

img_pc_trade_2020_02.png

154 ms

img_pc_otc.png

img_pc_otc.png

152 ms

icon_security_coldwallet_201905.svg

icon_security_coldwallet_201905.svg

149 ms

icon_security_sysytem_201905.svg

icon_security_sysytem_201905.svg

152 ms

icon_security_2fa_201905.svg

icon_security_2fa_201905.svg

166 ms

img-nikkei.png

img-nikkei.png

168 ms

img-wired.png

img-wired.png

156 ms

img-asahi.png

img-asahi.png

176 ms

img-yomiuri.png

img-yomiuri.png

164 ms

img-wbs.png

img-wbs.png

174 ms

img-tech.png

img-tech.png

173 ms

top_bg_img_2020_02.png

top_bg_img_2020_02.png

135 ms

fontawesome-webfont-199411f659f41aaccb959bacb1b0de30e54f244352a48c6f9894e65ae0f8a9a1.woff

fontawesome-webfont-199411f659f41aaccb959bacb1b0de30e54f244352a48c6f9894e65ae0f8a9a1.woff

77 ms

icon_arrow.svg

icon_arrow.svg

94 ms

dot_a.svg

dot_a.svg

102 ms

dot_b.svg

dot_b.svg

104 ms

dot_c.svg

dot_c.svg

97 ms

dot_d.svg

dot_d.svg

100 ms

img_reserve.svg

img_reserve.svg

105 ms

img_lending.svg

img_lending.svg

116 ms

img_payment.svg

img_payment.svg

114 ms

img_denki.svg

img_denki.svg

109 ms

img_gas.svg

img_gas.svg

112 ms

img_survey.svg

img_survey.svg

111 ms

Accessibility Review

coincheck.com accessibility score

67

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

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

coincheck.com 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

coincheck.com SEO score

71

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Document doesn't have a valid hreflang

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 doesn't use legible font sizes

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 Coincheck.com 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 Coincheck.com 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

coincheck.com

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