Access jammin.co.jp. チャリティー専門ファッションブランドJAMMIN（ジャミン）のオンラインショップ

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

10/100

10%

LCP (Largest Contentful Paint)

Value31.8 s

0/100

25%

SI (Speed Index)

Value14.3 s

1/100

10%

TBT (Total Blocking Time)

Value3,550 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.099

90/100

15%

TTI (Time to Interactive)

Value16.1 s

6/100

10%

jammin.co.jp

616 ms

jammin.co.jp

1012 ms

fs_style.css

883 ms

fs_theme.css

2095 ms

fs_original.css

1604 ms

Our browser made a total of 99 requests to load all elements on the main page. We found that 32% of them (32 requests) were addressed to the original Jammin.co.jp, 53% (52 requests) were made to Jammin1122.itembox.design and 6% (6 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (4.1 sec) relates to the external source Jammin1122.itembox.design.

Content Size

5.0 MB

After Optimization

4.7 MB

In fact, the total size of Jammin.co.jp main page is 5.0 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. 70% of websites need less resources to load. Images take 4.5 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 124.1 kB

Original 142.6 kB
After minification 124.1 kB
After compression 18.5 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 18.5 kB, which is 13% 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 124.1 kB or 87% of the original size.

Image Optimization

-3%

Potential reduce by 127.9 kB

Original 4.5 MB
After minification 4.4 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. Jammin images are well optimized though.

JavaScript Optimization

-14%

Potential reduce by 35.8 kB

Original 250.9 kB
After minification 250.9 kB
After compression 215.2 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 35.8 kB or 14% of the original size.

CSS Optimization

-7%

Potential reduce by 7.3 kB

Original 100.0 kB
After minification 100.0 kB
After compression 92.7 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. Jammin.co.jp has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 90 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jammin. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

[role] values are not valid

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

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.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

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 Jammin.co.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 Jammin.co.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

jammin.co.jp

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

Report Summary

Performance

Accessibility

Best Practices

SEO

チャリティー専門ファッションブランドJAMMIN（ジャミン）のオンラインショップ

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

jammin.co.jp

jammin.co.jp

fs_style.css

fs_theme.css

fs_original.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

jammin.co.jp

jammin.co.jp

fs_style.css

fs_theme.css

fs_original.css

webstore-vg.js

js

icon

all.css

main.css

jquery.min.js

jquery.bxslider.min.js

slick.min.js

webstore.js

css

css2

hd_logo2.png

slider-240819.jpg

slider-240500-ptokyo.jpg

slider-240700-pulusu.jpg

slider-240700-otera.jpg

slider-240700-tigermask.jpg

slider-240700-oraken.jpg

slider01.jpg

slider02.jpg

slider03.jpg

sec1_ttl.png

sec2_ttl2_sp.png

sec3_ttl.png

sec4_ttl.png

sec5_ttl.png

sec6_ttl.png

sec7_ttl.png

ft_logo.png

sec1_bg.png

sec1_ttl2.png

sec2_bnr02.png

sec2_bnr03.png

sec3_bg.png

sec3_ttl2.png

sec4_ttl2.png

sec5_ttl2.png

sec6_ttl2.png