Tools & Wizards About Us
kerastase.jp screenshot

Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

kerastase.jp

ケラスターゼ公式サイト KERASTASE PARIS767

Page Load Speed

3.7 sec in total

First Response

98 ms

Resources Loaded

3.5 sec

Page Rendered

82 ms

kerastase.jp screenshot

About Website

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

パリで生まれたヘアエステティック ブランド「ケラスターゼ」の公式サイト。製品情報や取り扱いヘアサロン、最新キャンペーン、髪の悩みに対する解決方法などをご覧いただけます。

Visit kerastase.jp

Key Findings

We analyzed Kerastase.jp page load time and found that the first response time was 98 ms and then it took 3.6 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

kerastase.jp performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value15.7 s

0/100

25%

SI (Speed Index)

Value10.4 s

8/100

10%

TBT (Total Blocking Time)

Value2,600 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.062

97/100

15%

TTI (Time to Interactive)

Value15.4 s

7/100

10%

Network Requests Diagram

kerastase.jp

98 ms

www.kerastase.jp

1326 ms

otSDKStub.js

37 ms

gtm.js

111 ms

bundle.css

1086 ms

Our browser made a total of 20 requests to load all elements on the main page. We found that 75% of them (15 requests) were addressed to the original Kerastase.jp, 15% (3 requests) were made to Cdn.cookielaw.org and 5% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Kerastase.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 249.5 kB (32%)

Content Size

783.0 kB

After Optimization

533.6 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Kerastase.jp main page is 783.0 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. Javascripts take 565.2 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 111.2 kB

  • Original 131.0 kB
  • After minification 92.5 kB
  • After compression 19.8 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. This page needs HTML code to be minified as it can gain 38.5 kB, which is 29% 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 111.2 kB or 85% of the original size.

JavaScript Optimization

-20%

Potential reduce by 112.6 kB

  • Original 565.2 kB
  • After minification 565.2 kB
  • After compression 452.6 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 112.6 kB or 20% of the original size.

CSS Optimization

-30%

Potential reduce by 25.7 kB

  • Original 86.8 kB
  • After minification 86.8 kB
  • After compression 61.1 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. Kerastase.jp needs all CSS files to be minified and compressed as it can save up to 25.7 kB or 30% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (40%)

Requests Now

15

After Optimization

9

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 15 CSS, Javascripts, AJAX and image requests in order to completely render the main page of KERASTASE. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

kerastase.jp

kerastase.jp

98 ms

www.kerastase.jp

www.kerastase.jp

1326 ms

otSDKStub.js

otSDKStub.js

37 ms

gtm.js

gtm.js

111 ms

bundle.css

bundle.css

1086 ms

bundle.css

bundle.css

1085 ms

kerastase-paris-logo.svg

kerastase-paris-logo.svg

73 ms

29194f2e-f681-4bd1-a9ea-7c31f3074270.json

29194f2e-f681-4bd1-a9ea-7c31f3074270.json

137 ms

location

location

39 ms

otBannerSdk.js

otBannerSdk.js

23 ms

bundle.js

bundle.js

1041 ms

bundle.js

bundle.js

1082 ms

instagram.svg

instagram.svg

58 ms

facebook.svg

facebook.svg

59 ms

twitter.svg

twitter.svg

172 ms

youtube.svg

youtube.svg

1180 ms

908c4810-64db-4b46-bb8e-823eb41f68c0.woff

908c4810-64db-4b46-bb8e-823eb41f68c0.woff

1083 ms

0c0418fe-d324-4ab2-978a-e8201c646ca1.woff

0c0418fe-d324-4ab2-978a-e8201c646ca1.woff

1061 ms

PlayfairDisplay-Regular.ttf

PlayfairDisplay-Regular.ttf

1198 ms

main.js

main.js

36 ms

Accessibility Review

kerastase.jp accessibility score

88

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

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

kerastase.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

High

Missing source maps for large first-party JavaScript

SEO Factors

kerastase.jp SEO score

93

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

Image elements do not have [alt] attributes

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 Kerastase.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 Kerastase.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

kerastase.jp

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