5.8 sec in total
1 sec
4.4 sec
398 ms
Visit 19ch.tv now to see the best up-to-date 19 Ch content for Japan and also check out these interesting facts you probably never knew about 19ch.tv
葉一の公式サイト「19ch(塾チャンネル)」。2,000本以上のYouTube授業と専用プリントを無料公開中。とある男が授業をしてみた|小学3年〜6年の算数、中学生の数学、国語、理科、社会、英語、高校数学に対応。高校受験の対策動画や、聞くだけで覚える暗記法も。
Visit 19ch.tvWe analyzed 19ch.tv page load time and found that the first response time was 1 sec and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
19ch.tv performance score
name
value
score
weighting
Value2.4 s
71/100
10%
Value7.4 s
4/100
25%
Value6.8 s
35/100
10%
Value1,900 ms
8/100
30%
Value0.418
23/100
15%
Value12.6 s
14/100
10%
1002 ms
14 ms
15 ms
866 ms
572 ms
Our browser made a total of 130 requests to load all elements on the main page. We found that 7% of them (9 requests) were addressed to the original 19ch.tv, 6% (8 requests) were made to Googleads.g.doubleclick.net and 6% (8 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Omt.shinobi.jp.
Page size can be reduced by 435.3 kB (51%)
853.9 kB
418.6 kB
In fact, the total size of 19ch.tv main page is 853.9 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. 65% of websites need less resources to load. Javascripts take 543.6 kB which makes up the majority of the site volume.
Potential reduce by 35.8 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 35.8 kB or 77% of the original size.
Potential reduce by 10.7 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. 19 Ch images are well optimized though.
Potential reduce by 293.0 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 293.0 kB or 54% of the original size.
Potential reduce by 95.7 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. 19ch.tv needs all CSS files to be minified and compressed as it can save up to 95.7 kB or 83% of the original size.
Number of requests can be reduced by 73 (59%)
123
50
The browser has sent 123 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 19 Ch. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 41 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.
19ch.tv
1002 ms
pure-min.css
14 ms
grids-responsive-min.css
15 ms
font-awesome.css
866 ms
marketing.css
572 ms
adsbygoogle.js
6 ms
logo.png
567 ms
platform.js
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ca-pub-4383688975914662.js
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zrt_lookup.html
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show_ads_impl.js
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goukaku_ema.png
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icons.png
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radio.png
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daradaR2.png
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fontawesome-webfont.woff
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cse.js
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widgets.js
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82017ef0c645c4ecc6ee6fa1118b1781
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ads
204 ms
osd.js
11 ms
ads
220 ms
ads
169 ms
ads
116 ms
cse.js
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abg.js
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m_js_controller.js
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adj
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beacon
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adj
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beacon
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favicon
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s
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googlelogo_color_112x36dp.png
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nessie_icon_tiamat_white.png
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x_button_blue2.png
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jsapi
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E4WYPs_lNJIuXrWpTsOcc3FIG36RfI0ERc0srw5QW9Y.js
19 ms
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activityi;src=4236808;type=invmedia;cat=4ztf2oue;ord=-969255514
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activityi;src=4236808;type=invmedia;cat=aoyjbkr6;ord=-969255514
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activityi;src=4236808;type=invmedia;cat=ijhardnr;ord=-969255514
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activityi;src=4236808;type=invmedia;cat=qk1cfvwl;ord=-969255514
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pixel
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lidar.js
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sbhK2lTE.js
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index.html
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verify_selector.js
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blank.gif
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beacon.js
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blank.gif
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cTrvNaRi.html
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pixel
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sd
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verifyr.js
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verifyr.js
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client-verify.adtricity.com
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bg.png
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adchoices.en.png
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activityi;src=4236808;type=invmedia;cat=qk1cfvwl;ord=-1690037954
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activityi;src=4236808;type=invmedia;cat=ijhardnr;ord=-1690037954
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activityi;src=4236808;type=invmedia;cat=4ztf2oue;ord=-1690037954
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activityi;src=4236808;type=invmedia;cat=aoyjbkr6;ord=-1690037954
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Rejuvenation_728x90_logo.gif
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Rejuvenation_728x90_bg.jpg
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pixel
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default+ja.css
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shiny.css
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default+ja.I.js
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shiny.css
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ninja_onetag.css
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trac.js
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activeview
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analytics.js
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timeline.1b43d11859b7663a2225b885f87704a5.js
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sdk.js
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cb=gapi.loaded_0
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cb=gapi.loaded_1
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subscribe_embed
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button.831500944bc3eb7ea5276ccdc3f71d2e.js
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postmessageRelay
89 ms
collect
116 ms
syndication
171 ms
688871585394982912
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tweet_button.6a78875565a912489e9aef879c881358.en.html
32 ms
api.js
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core:rpc:shindig.random:shindig.sha1.js
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www-subscribe-embed-vflWJjAep.css
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photo.jpg
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www-subscribe-embed.js
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xd_arbiter.php
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cb=gapi.loaded_0
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cookiesync
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cb=gapi.loaded_2
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timeline.4d087f49a21e27038d9769d7c976b8fa.default.css
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wCwOcAOD_normal.jpg
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async-ads.js
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google_custom_search_watermark.gif
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small-logo.png
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clear.gif
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like.php
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jot
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19ch.tv accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-*] attributes do not match their roles
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
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
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
19ch.tv best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
19ch.tv SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
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
Document uses legible font sizes
Tap targets are not sized appropriately
JA
JA
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 19ch.tv 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 19ch.tv 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.
19ch.tv
Open Graph description is not detected on the main page of 19 Ch. 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: