2.6 sec in total
641 ms
1.8 sec
143 ms
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Visit sem-seminar.comWe analyzed Sem-seminar.com page load time and found that the first response time was 641 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.
sem-seminar.com performance score
name
value
score
weighting
Value2.7 s
61/100
10%
Value2.7 s
86/100
25%
Value2.7 s
97/100
10%
Value30 ms
100/100
30%
Value0.001
100/100
15%
Value2.7 s
97/100
10%
641 ms
317 ms
336 ms
373 ms
608 ms
Our browser made a total of 15 requests to load all elements on the main page. We found that 73% of them (11 requests) were addressed to the original Sem-seminar.com, 13% (2 requests) were made to Google-analytics.com and 7% (1 request) were made to Xml.affiliate.rakuten.co.jp. The less responsive or slowest element that took the longest time to load (770 ms) relates to the external source Xml.affiliate.rakuten.co.jp.
Page size can be reduced by 10.0 kB (28%)
36.0 kB
26.0 kB
In fact, the total size of Sem-seminar.com main page is 36.0 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. Only 10% of websites need less resources to load. Javascripts take 21.5 kB which makes up the majority of the site volume.
Potential reduce by 8.7 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 8.7 kB or 68% of the original size.
Potential reduce by 40 B
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.
Potential reduce by 1.3 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. Sem-seminar.com needs all CSS files to be minified and compressed as it can save up to 1.3 kB or 74% of the original size.
We found no issues to fix!
14
14
The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sem Seminar. According to our analytics all requests are already optimized.
sem-seminar.com
641 ms
seminar.css
317 ms
w200.gif
336 ms
logo_1.gif
373 ms
img09.gif
608 ms
rakuten_widget.js
770 ms
img00.gif
369 ms
logo_2.gif
373 ms
stamp.gif
372 ms
book_ad_small.gif
559 ms
book_shop_small.gif
560 ms
book_sem_small.gif
560 ms
mtwidget04.affiliate.rakuten.co.jp
357 ms
ga.js
31 ms
__utm.gif
31 ms
sem-seminar.com accessibility score
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
Image elements do not have [alt] attributes
Links do not have a discernible name
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>).
sem-seminar.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
sem-seminar.com 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
EN
JA
SHIFT_JIS
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sem-seminar.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Japanese language. Our system also found out that Sem-seminar.com main page’s claimed encoding is shift_jis. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
sem-seminar.com
Open Graph description is not detected on the main page of Sem Seminar. 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: