Access bts-official.jp. BTS JAPAN OFFICIAL FANCLUB

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

51/100

10%

LCP (Largest Contentful Paint)

Value41.2 s

0/100

25%

SI (Speed Index)

Value13.5 s

2/100

10%

TBT (Total Blocking Time)

Value2,050 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value19.7 s

2/100

10%

bts-official.jp

303 ms

bts-official.jp

791 ms

reset.css

147 ms

common.css

292 ms

slick.css

426 ms

Our browser made a total of 86 requests to load all elements on the main page. We found that 17% of them (15 requests) were addressed to the original Bts-official.jp, 66% (57 requests) were made to Files.bts-official.jp and 6% (5 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (997 ms) belongs to the original domain Bts-official.jp.

Content Size

36.4 MB

After Optimization

36.0 MB

In fact, the total size of Bts-official.jp main page is 36.4 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. Only a small number of websites need less resources to load. Images take 36.1 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 27.8 kB

Original 34.8 kB
After minification 33.9 kB
After compression 7.1 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 27.8 kB or 80% of the original size.

Image Optimization

-1%

Potential reduce by 389.2 kB

Original 36.1 MB
After minification 35.7 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. BTS OFFICIAL images are well optimized though.

JavaScript Optimization

-5%

Potential reduce by 11.9 kB

Original 220.6 kB
After minification 220.5 kB
After compression 208.7 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

-5%

Potential reduce by 3.1 kB

Original 69.7 kB
After minification 69.7 kB
After compression 66.5 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. Bts-official.jp has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 78 CSS, Javascripts, AJAX and image requests in order to completely render the main page of BTS OFFICIAL. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 5 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

ARIA input fields do not have accessible names

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

<frame> or <iframe> elements do not have a title

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

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>).

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

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

Page has valid source maps

Search Engine Optimization Advices

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

High

robots.txt is not valid

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 Bts-official.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 Bts-official.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

bts-official.jp

Open Graph data is detected on the main page of BTS OFFICIAL. 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

BTS JAPAN OFFICIAL FANCLUB

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

bts-official.jp

bts-official.jp

reset.css

common.css

slick.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

bts-official.jp

bts-official.jp

reset.css

common.css

slick.css

slick-theme.css

jquery-1.7.2.min.js

common.js

top.js

jquery.cookie.js

slick.min.js

js

js

bts-main-logo.png

embed

mailmg-icon-black.png

army-logo-white.png

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