Tools & Wizards About Us
19online.net screenshot

Report Summary

  • 43

    Performance

    Renders faster than
    62% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

19online.net

★まなゲーらんど★英単語、算数、漢字、反復学習をゲームで楽しく

Page Load Speed

6.3 sec in total

First Response

582 ms

Resources Loaded

4.7 sec

Page Rendered

1.1 sec

19online.net screenshot

About Website

Welcome to 19online.net homepage info - get ready to check 19 Online best content for Japan right away, or after learning these important things about 19online.net

退屈な反復学習をゲームで楽しく！現役の先生達も開発に参加し、全国の学校で活用されています

Visit 19online.net

Key Findings

We analyzed 19online.net page load time and found that the first response time was 582 ms and then it took 5.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

19online.net performance score

43

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value4.6 s

35/100

25%

SI (Speed Index)

Value6.9 s

34/100

10%

TBT (Total Blocking Time)

Value700 ms

42/100

30%

CLS (Cumulative Layout Shift)

Value0.121

84/100

15%

TTI (Time to Interactive)

Value8.6 s

37/100

10%

Network Requests Diagram

19online.net

582 ms

19online.net

1100 ms

keen-slider.min.css

35 ms

styles2022.css

486 ms

smooth-scroll.min.js

50 ms

Our browser made a total of 37 requests to load all elements on the main page. We found that 76% of them (28 requests) were addressed to the original 19online.net, 8% (3 requests) were made to Pagead2.googlesyndication.com and 8% (3 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (2.8 sec) belongs to the original domain 19online.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 893.8 kB (17%)

Content Size

5.1 MB

After Optimization

4.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 19online.net main page is 5.1 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. 35% of websites need less resources to load. Images take 4.4 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 43.0 kB

  • Original 53.7 kB
  • After minification 45.6 kB
  • After compression 10.7 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. This page needs HTML code to be minified as it can gain 8.1 kB, which is 15% 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 43.0 kB or 80% of the original size.

Image Optimization

-11%

Potential reduce by 484.3 kB

  • Original 4.4 MB
  • After minification 4.0 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. Obviously, 19 Online needs image optimization as it can save up to 484.3 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

-58%

Potential reduce by 358.6 kB

  • Original 618.6 kB
  • After minification 618.6 kB
  • After compression 260.0 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 358.6 kB or 58% of the original size.

CSS Optimization

-84%

Potential reduce by 7.8 kB

  • Original 9.3 kB
  • After minification 5.0 kB
  • After compression 1.4 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. 19online.net needs all CSS files to be minified and compressed as it can save up to 7.8 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (11%)

Requests Now

35

After Optimization

31

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 19 Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

19online.net

19online.net

582 ms

19online.net

19online.net

1100 ms

keen-slider.min.css

keen-slider.min.css

35 ms

styles2022.css

styles2022.css

486 ms

smooth-scroll.min.js

smooth-scroll.min.js

50 ms

show_ads.js

show_ads.js

95 ms

keen-slider.min.js

keen-slider.min.js

127 ms

mnglogo.png

mnglogo.png

183 ms

topimg.png

topimg.png

1935 ms

ddk.png

ddk.png

1052 ms

ddr.png

ddr.png

1401 ms

am2.png

am2.png

932 ms

rakuben56_banner.png

rakuben56_banner.png

1313 ms

kktdr.png

kktdr.png

1133 ms

dde.png

dde.png

2047 ms

typing.png

typing.png

1226 ms

co_sdhr_b.png

co_sdhr_b.png

1699 ms

kawai15.png

kawai15.png

1578 ms

co_sdhr_a.png

co_sdhr_a.png

1874 ms

co_sdhr_c.png

co_sdhr_c.png

1925 ms

amami16.png

amami16.png

1928 ms

hoei23_2.png

hoei23_2.png

2453 ms

hoei23.png

hoei23.png

2623 ms

uk1903.png

uk1903.png

2450 ms

houei18.png

houei18.png

2278 ms

chuo16.png

chuo16.png

2253 ms

miyake16b.png

miyake16b.png

2788 ms

higashi16.png

higashi16.png

2577 ms

douontest.png

douontest.png

2454 ms

miyake15.png

miyake15.png

2799 ms

mchuo15.png

mchuo15.png

2829 ms

adsbygoogle.js

adsbygoogle.js

99 ms

footer_bg.png

footer_bg.png

2560 ms

show_ads_impl.js

show_ads_impl.js

385 ms

zrt_lookup.html

zrt_lookup.html

29 ms

ads

ads

40 ms

ads

ads

396 ms

Accessibility Review

19online.net accessibility score

98

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

19online.net best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

19online.net SEO score

100

Search Engine Optimization Advices

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 19online.net 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 19online.net 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

19online.net

Open Graph description is not detected on the main page of 19 Online. 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: