Tools & Wizards About Us
mercari.jp screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 69% of websites

  • 85

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

mercari.jp

Page Load Speed

4.2 sec in total

First Response

77 ms

Resources Loaded

3.3 sec

Page Rendered

818 ms

mercari.jp screenshot

About Website

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

CMで話題！フリマアプリ「メルカリ」は、スマホから誰でも簡単に売り買いが楽しめるフリマアプリです。購入時はクレジットカード・キャリア決済・コンビニ・銀行ATMで支払いでき、品物が届いてから出品者に入金される独自システムで安心です。

Visit mercari.jp

Key Findings

We analyzed Mercari.jp page load time and found that the first response time was 77 ms and then it took 4.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

mercari.jp performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value15.2 s

0/100

25%

SI (Speed Index)

Value9.1 s

14/100

10%

TBT (Total Blocking Time)

Value810 ms

36/100

30%

CLS (Cumulative Layout Shift)

Value0.054

98/100

15%

TTI (Time to Interactive)

Value16.8 s

5/100

10%

Network Requests Diagram

77 ms

1455 ms

css

54 ms

app.jp.css

1092 ms

main_content_pc.png

165 ms

Our browser made a total of 35 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Mercari.jp, 11% (4 requests) were made to Mercari.com and 6% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Mercari.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 747.1 kB (45%)

Content Size

1.7 MB

After Optimization

919.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Mercari.jp main page is 1.7 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 841.7 kB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 529.0 kB

  • Original 578.5 kB
  • After minification 353.5 kB
  • After compression 49.5 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 225.1 kB, which is 39% 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 529.0 kB or 91% of the original size.

Image Optimization

-6%

Potential reduce by 51.2 kB

  • Original 841.7 kB
  • After minification 790.5 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. Mercari images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 90.9 kB

  • Original 155.9 kB
  • After minification 155.9 kB
  • After compression 65.1 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 90.9 kB or 58% of the original size.

CSS Optimization

-84%

Potential reduce by 76.0 kB

  • Original 90.8 kB
  • After minification 90.3 kB
  • After compression 14.8 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. Mercari.jp needs all CSS files to be minified and compressed as it can save up to 76.0 kB or 84% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

32

After Optimization

32

  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mercari. According to our analytics all requests are already optimized.

Network Requests Diagram

77 ms

1455 ms

css

css

54 ms

app.jp.css

app.jp.css

1092 ms

main_content_pc.png

main_content_pc.png

165 ms

top_main_sp.jpg

top_main_sp.jpg

1121 ms

start1.jpg

start1.jpg

1119 ms

start2.jpg

start2.jpg

1121 ms

start3.jpg

start3.jpg

1418 ms

download_banner_sp.jpg

download_banner_sp.jpg

29 ms

mercari_icon.png

mercari_icon.png

32 ms

download_content_pc.png

download_content_pc.png

41 ms

app.js

app.js

8 ms

flag_us.png

flag_us.png

9 ms

flag_jp.png

flag_jp.png

13 ms

custom-banner-icon.png

custom-banner-icon.png

14 ms

star-on.png

star-on.png

16 ms

star-off.png

star-off.png

19 ms

main_bg_pc.jpg

main_bg_pc.jpg

873 ms

download_area_bg_pc.jpg

download_area_bg_pc.jpg

691 ms

download_bg_pc.jpg

download_bg_pc.jpg

126 ms

category_thumb1.png

category_thumb1.png

131 ms

category_thumb2.png

category_thumb2.png

124 ms

category_thumb3.png

category_thumb3.png

238 ms

category_thumb4.png

category_thumb4.png

125 ms

category_thumb5.png

category_thumb5.png

126 ms

category_thumb6.png

category_thumb6.png

126 ms

category_thumb7.png

category_thumb7.png

126 ms

category_thumb8.png

category_thumb8.png

127 ms

category_thumb9.png

category_thumb9.png

127 ms

category_thumb1027.png

category_thumb1027.png

128 ms

category_thumb10.png

category_thumb10.png

129 ms

icon-font.woff

icon-font.woff

772 ms

analytics.js

analytics.js

56 ms

collect

collect

14 ms

Accessibility Review

mercari.jp accessibility score

88

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

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.

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>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

mercari.jp best practices score

85

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

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

mercari.jp SEO score

100

Search Engine Optimization Advices

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

    N/A

  • Language Claimed

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Mercari.jp can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Japanese. Our system also found out that Mercari.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

mercari.jp

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