Report Summary

  • 9

    Performance

    Renders faster than
    23% of other websites

  • 50

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

netoff.co.jp

【公式】ネットオフ|本・ゲーム・DVD・CDの中古通販/買取

Page Load Speed

7.1 sec in total

First Response

556 ms

Resources Loaded

5.8 sec

Page Rendered

764 ms

netoff.co.jp screenshot

About Website

Visit netoff.co.jp now to see the best up-to-date Netoff content for Japan and also check out these interesting facts you probably never knew about netoff.co.jp

古本、中古コミック、中古漫画の買取や購入は日本最大級のコミック通販サイト ネットオフをご利用ください。ご自宅で本の買取が依頼できる『本&ゲーム買取コース』や『ポストにポン買取』など宅配買取サービスも充実。コミックのほかにも中古CD/DVD、中古ゲームなど60万タイトル/120万点の品揃えで、1,500円以上で送料無料!

Visit netoff.co.jp

Key Findings

We analyzed Netoff.co.jp page load time and found that the first response time was 556 ms and then it took 6.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

netoff.co.jp performance score

9

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.8 s

1/100

10%

LCP (Largest Contentful Paint)

Value19.4 s

0/100

25%

SI (Speed Index)

Value22.6 s

0/100

10%

TBT (Total Blocking Time)

Value4,030 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.218

57/100

15%

TTI (Time to Interactive)

Value32.9 s

0/100

10%

Network Requests Diagram

netoff.co.jp

556 ms

index.jsp

1323 ms

index.css

950 ms

dc.js

77 ms

analytics.js

75 ms

Our browser made a total of 91 requests to load all elements on the main page. We found that 54% of them (49 requests) were addressed to the original Netoff.co.jp, 5% (5 requests) were made to Googleads.g.doubleclick.net and 5% (5 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain Netoff.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 407.0 kB (38%)

Content Size

1.1 MB

After Optimization

658.4 kB

In fact, the total size of Netoff.co.jp main page is 1.1 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. 30% of websites need less resources to load. Images take 474.5 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 109.8 kB

  • Original 135.7 kB
  • After minification 121.2 kB
  • After compression 25.9 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 14.5 kB, which is 11% 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 109.8 kB or 81% of the original size.

Image Optimization

-5%

Potential reduce by 25.5 kB

  • Original 474.5 kB
  • After minification 449.1 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. Netoff images are well optimized though.

JavaScript Optimization

-56%

Potential reduce by 226.6 kB

  • Original 402.3 kB
  • After minification 378.4 kB
  • After compression 175.6 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 226.6 kB or 56% of the original size.

CSS Optimization

-85%

Potential reduce by 45.1 kB

  • Original 52.9 kB
  • After minification 46.2 kB
  • After compression 7.8 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. Netoff.co.jp needs all CSS files to be minified and compressed as it can save up to 45.1 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 48 (59%)

Requests Now

81

After Optimization

33

The browser has sent 81 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Netoff. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

netoff.co.jp accessibility score

50

Accessibility Issues

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

Names and labels

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.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

netoff.co.jp best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

netoff.co.jp SEO score

77

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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

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 Netoff.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 Netoff.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

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