Tools & Wizards About Us

Report Summary

  • 1

    Performance

    Renders faster than
    19% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

smile-zemi.jp

タブレットで学ぶ幼児・小学生・中学生・高校生向け通信教育｜【公式】スマイルゼミ

Page Load Speed

4.1 sec in total

First Response

293 ms

Resources Loaded

3.6 sec

Page Rendered

197 ms

About Website

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

タブレットで学ぶ幼児・小学生・中学生・高校生向け通信教育「スマイルゼミ」

Visit smile-zemi.jp

Key Findings

We analyzed Smile-zemi.jp page load time and found that the first response time was 293 ms and then it took 3.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

smile-zemi.jp performance score

1

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.3 s

1/100

10%

LCP (Largest Contentful Paint)

Value23.2 s

0/100

25%

SI (Speed Index)

Value18.7 s

0/100

10%

TBT (Total Blocking Time)

Value10,640 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.742

6/100

15%

TTI (Time to Interactive)

Value64.7 s

0/100

10%

Network Requests Diagram

smile-zemi.jp

293 ms

smile-zemi.jp

735 ms

smile-bootstrap.css

576 ms

global-style.css

718 ms

animations.css

619 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 91% of them (52 requests) were addressed to the original Smile-zemi.jp, 4% (2 requests) were made to Youtube.com and 2% (1 request) were made to Unpkg.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Smile-zemi.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 543.3 kB (35%)

Content Size

1.6 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Smile-zemi.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. 45% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 14.8 kB

  • Original 19.5 kB
  • After minification 17.8 kB
  • After compression 4.7 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 14.8 kB or 76% of the original size.

Image Optimization

-11%

Potential reduce by 111.9 kB

  • Original 1.0 MB
  • After minification 890.4 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. Obviously, Smile Zemi needs image optimization as it can save up to 111.9 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-70%

Potential reduce by 182.2 kB

  • Original 261.9 kB
  • After minification 245.9 kB
  • After compression 79.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 182.2 kB or 70% of the original size.

CSS Optimization

-86%

Potential reduce by 234.4 kB

  • Original 271.8 kB
  • After minification 217.9 kB
  • After compression 37.3 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. Smile-zemi.jp needs all CSS files to be minified and compressed as it can save up to 234.4 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 26 (51%)

Requests Now

51

After Optimization

25

  • Images
  • JavaScript
  • CSS

The browser has sent 51 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Smile Zemi. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

smile-zemi.jp accessibility score

78

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

smile-zemi.jp best practices score

83

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

Page has valid source maps

SEO Factors

smile-zemi.jp SEO score

92

Search Engine Optimization Advices

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

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 Smile-zemi.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 Smile-zemi.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 Smile Zemi. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: