Access dl.rakuten.co.jp. 楽天ブックス: 楽天ブックスダウンロード版

dl.rakuten.co.jp screenshot

14

Performance

Renders faster than
26% of other websites
77

Accessibility

Visual factors better than
that of 45% of websites
67

Best Practices

More advanced features
available than in
24% of websites
91

SEO

Google-friendlier than
71% of websites

First Response

850 ms

Resources Loaded

8.6 sec

Page Rendered

1.9 sec

dl.rakuten.co.jp screenshot

About Website

Welcome to dl.rakuten.co.jp homepage info - get ready to check Dl Rakuten best content for Japan right away, or after learning these important things about dl.rakuten.co.jp

楽天ブックスダウンロード版は、ソフトウェア・ゲーム・動画のダウンロード商品をご購入いただけるサービスです。

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Key Findings

We analyzed Dl.rakuten.co.jp page load time and found that the first response time was 850 ms and then it took 10.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

5/100

10%

LCP (Largest Contentful Paint)

Value13.8 s

0/100

25%

SI (Speed Index)

Value11.0 s

6/100

10%

TBT (Total Blocking Time)

Value2,660 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.157

74/100

15%

TTI (Time to Interactive)

Value21.3 s

1/100

10%

dl.rakuten.co.jp

850 ms

minmax.js

323 ms

mail.js

320 ms

prm_selector_02.js

376 ms

style.css

350 ms

Our browser made a total of 150 requests to load all elements on the main page. We found that 30% of them (45 requests) were addressed to the original Dl.rakuten.co.jp, 59% (88 requests) were made to Image.dl.rakuten.co.jp and 3% (4 requests) were made to Jp.rakuten-static.com. The less responsive or slowest element that took the longest time to load (3.2 sec) relates to the external source Image.dl.rakuten.co.jp.

Content Size

914.4 kB

After Optimization

646.6 kB

In fact, the total size of Dl.rakuten.co.jp main page is 914.4 kB. 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 635.6 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 86.3 kB

Original 107.1 kB
After minification 101.2 kB
After compression 20.8 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 86.3 kB or 81% of the original size.

Image Optimization

-8%

Potential reduce by 52.6 kB

Original 635.6 kB
After minification 582.9 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. Dl Rakuten images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 73.5 kB

Original 106.6 kB
After minification 95.1 kB
After compression 33.1 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 73.5 kB or 69% of the original size.

CSS Optimization

-85%

Potential reduce by 55.2 kB

Original 65.1 kB
After minification 52.3 kB
After compression 9.9 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. Dl.rakuten.co.jp needs all CSS files to be minified and compressed as it can save up to 55.2 kB or 85% of the original size.

Requests Now

148

After Optimization

98

The browser has sent 148 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dl Rakuten. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 7 to 1 for CSS 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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

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

EUC-JP

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dl.rakuten.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 Dl.rakuten.co.jp main page’s claimed encoding is euc-jp. 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

dl.rakuten.co.jp

Open Graph description is not detected on the main page of Dl Rakuten. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: