Tools & Wizards About Us
serai.jp screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

serai.jp

サライ.jp｜小学館の雑誌『サライ』公式サイト

Page Load Speed

9 sec in total

First Response

327 ms

Resources Loaded

5.8 sec

Page Rendered

2.8 sec

serai.jp screenshot

About Website

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

小学館の雑誌『サライ』の公式サイトです。歳を重ね、よりアクティブに行動したいと思っている大人の方々へのライフスタイル提案と、旅、食、人物、歴史、文化、趣味、健康、モノ情報など上質な情報を発信します。

Visit serai.jp

Key Findings

We analyzed Serai.jp page load time and found that the first response time was 327 ms and then it took 8.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

serai.jp performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value43.0 s

0/100

25%

SI (Speed Index)

Value16.9 s

0/100

10%

TBT (Total Blocking Time)

Value2,220 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value60.4 s

0/100

10%

Network Requests Diagram

serai.jp

327 ms

serai.jp

1008 ms

viewport-extra.min.js

331 ms

sbi-styles.min.css

466 ms

style.min.css

496 ms

Our browser made a total of 137 requests to load all elements on the main page. We found that 87% of them (119 requests) were addressed to the original Serai.jp, 3% (4 requests) were made to Securepubads.g.doubleclick.net and 3% (4 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Serai.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 966.4 kB (6%)

Content Size

17.5 MB

After Optimization

16.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Serai.jp main page is 17.5 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 16.8 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 270.5 kB

  • Original 320.9 kB
  • After minification 285.0 kB
  • After compression 50.4 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 35.9 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 270.5 kB or 84% of the original size.

Image Optimization

-4%

Potential reduce by 648.6 kB

  • Original 16.8 MB
  • After minification 16.2 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. Serai images are well optimized though.

JavaScript Optimization

-10%

Potential reduce by 31.2 kB

  • Original 312.9 kB
  • After minification 312.9 kB
  • After compression 281.8 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

-34%

Potential reduce by 16.1 kB

  • Original 47.1 kB
  • After minification 46.9 kB
  • After compression 31.0 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. Serai.jp needs all CSS files to be minified and compressed as it can save up to 16.1 kB or 34% of the original size.

Requests Breakdown

Number of requests can be reduced by 32 (24%)

Requests Now

131

After Optimization

99

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 131 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Serai. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

serai.jp

serai.jp

327 ms

serai.jp

serai.jp

1008 ms

viewport-extra.min.js

viewport-extra.min.js

331 ms

sbi-styles.min.css

sbi-styles.min.css

466 ms

style.min.css

style.min.css

496 ms

pagenavi-css.css

pagenavi-css.css

529 ms

swiper.min.css

swiper.min.css

584 ms

common.css

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776 ms

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59 ms

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93 ms

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29 ms

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106 ms

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629 ms

css

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40 ms

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660 ms

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907 ms

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556 ms

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564 ms

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660 ms

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36 ms

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241 ms

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96 ms

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68 ms

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935 ms

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993 ms

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Accessibility Review

serai.jp accessibility score

88

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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.

Best Practices

serai.jp best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

serai.jp SEO score

91

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

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 Serai.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 Serai.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

serai.jp

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