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About Website

Click here to check amazing Coreserver content for Japan. Otherwise, check out these important facts you probably never knew about coreserver.jp

高速・高安定・大容量のレンタルサーバー「コアサーバー」。全プラン転送量無制限、高速SSD、無料SSL、WordPressインストール対応！さらにサポートも充実。30日間の無料お試し期間があるので、個人から法人まで安心してお使いいただけます。

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name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

44/100

10%

LCP (Largest Contentful Paint)

Value12.6 s

0/100

25%

SI (Speed Index)

Value7.1 s

31/100

10%

TBT (Total Blocking Time)

Value1,610 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value15.4 s

7/100

10%

coreserver.jp

528 ms

www.coreserver.jp

780 ms

common.css

15 ms

top.css

30 ms

jquery-3.7.1.min.js

32 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 58% of them (42 requests) were addressed to the original Coreserver.jp, 10% (7 requests) were made to Googletagmanager.com and 7% (5 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Coreserver.jp.

Content Size

1.6 MB

After Optimization

1.4 MB

In fact, the total size of Coreserver.jp main page is 1.6 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. 60% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 42.5 kB

Original 53.8 kB
After minification 49.3 kB
After compression 11.3 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 42.5 kB or 79% of the original size.

Image Optimization

-7%

Potential reduce by 105.4 kB

Original 1.5 MB
After minification 1.3 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. Coreserver images are well optimized though.

JavaScript Optimization

-48%

Potential reduce by 34.5 kB

Original 71.6 kB
After minification 71.6 kB
After compression 37.1 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 34.5 kB or 48% of the original size.

CSS Optimization

-15%

Potential reduce by 2.3 kB

Original 15.8 kB
After minification 15.8 kB
After compression 13.5 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. Coreserver.jp needs all CSS files to be minified and compressed as it can save up to 2.3 kB or 15% of the original size.

Requests Now

After Optimization

The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Coreserver. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

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

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

Search Engine Optimization Advices

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

High

Links are not crawlable

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

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 Coreserver.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 Coreserver.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

coreserver.jp

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

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Performance

Accessibility

Best Practices

SEO

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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)