Report Summary

  • 14

    Performance

    Renders faster than
    26% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 71

    SEO

    Google-friendlier than
    30% of websites

zozo.jp

ファッション通販ZOZOTOWN

Page Load Speed

8.7 sec in total

First Response

1.7 sec

Resources Loaded

6.4 sec

Page Rendered

606 ms

zozo.jp screenshot

About Website

Welcome to zozo.jp homepage info - get ready to check Zozo best content for Japan right away, or after learning these important things about zozo.jp

ZOZOTOWNは8500ブランドのアイテムを取扱うファッション通販サイトです。「ツケ払い」ならお支払は2ヶ月後!即日配送(一部地域)で最短翌日お届け。今なら割引クーポンを対象ショップ限定でご利用いただけます。

Visit zozo.jp

Key Findings

We analyzed Zozo.jp page load time and found that the first response time was 1.7 sec and then it took 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

zozo.jp performance score

14

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.4 s

7/100

10%

LCP (Largest Contentful Paint)

Value25.7 s

0/100

25%

SI (Speed Index)

Value17.2 s

0/100

10%

TBT (Total Blocking Time)

Value15,150 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.108

87/100

15%

TTI (Time to Interactive)

Value36.0 s

0/100

10%

Network Requests Diagram

zozo.jp

1687 ms

general.css

678 ms

10083.css

378 ms

default.css

555 ms

jquery.js

476 ms

Our browser made a total of 104 requests to load all elements on the main page. We found that 24% of them (25 requests) were addressed to the original Zozo.jp, 28% (29 requests) were made to Img5.zozo.jp and 24% (25 requests) were made to Img4.zozo.jp. The less responsive or slowest element that took the longest time to load (2.5 sec) relates to the external source Img5.zozo.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.9 MB (38%)

Content Size

5.1 MB

After Optimization

3.2 MB

In fact, the total size of Zozo.jp main page is 5.1 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. 55% of websites need less resources to load. Images take 2.9 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 77.0 kB

  • Original 98.4 kB
  • After minification 89.9 kB
  • After compression 21.4 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 77.0 kB or 78% of the original size.

Image Optimization

-6%

Potential reduce by 161.9 kB

  • Original 2.9 MB
  • After minification 2.8 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. Zozo images are well optimized though.

JavaScript Optimization

-64%

Potential reduce by 426.9 kB

  • Original 670.7 kB
  • After minification 594.3 kB
  • After compression 243.8 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 426.9 kB or 64% of the original size.

CSS Optimization

-90%

Potential reduce by 1.3 MB

  • Original 1.4 MB
  • After minification 1.3 MB
  • After compression 137.8 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. Zozo.jp needs all CSS files to be minified and compressed as it can save up to 1.3 MB or 90% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (20%)

Requests Now

98

After Optimization

78

The browser has sent 98 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zozo. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

zozo.jp accessibility score

83

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

zozo.jp best practices score

83

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

Missing source maps for large first-party JavaScript

SEO Factors

zozo.jp SEO score

71

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

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    JA

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zozo.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 Zozo.jp main page’s claimed encoding is shift_jis. 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

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