Access seisen.com. Seisen International School in Tokyo - Kindergarten to Grade 12 Catholic IB

name

value

score

weighting

FCP (First Contentful Paint)

Value5.8 s

5/100

10%

LCP (Largest Contentful Paint)

Value22.9 s

0/100

25%

SI (Speed Index)

Value29.3 s

0/100

10%

TBT (Total Blocking Time)

Value34,160 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.012

100/100

15%

TTI (Time to Interactive)

Value48.7 s

0/100

10%

seisen.com

53 ms

www.seisen.com

420 ms

dc.js

29 ms

si_behaviors-c.js

36 ms

si_onload.js

21 ms

Our browser made a total of 131 requests to load all elements on the main page. We found that 82% of them (107 requests) were addressed to the original Seisen.com, 10% (13 requests) were made to Fonts.gstatic.com and 5% (6 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (420 ms) belongs to the original domain Seisen.com.

Content Size

2.0 MB

After Optimization

1.3 MB

In fact, the total size of Seisen.com main page is 2.0 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. 65% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 27.8 kB

Original 33.9 kB
After minification 28.8 kB
After compression 6.0 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 5.1 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 27.8 kB or 82% of the original size.

Image Optimization

-4%

Potential reduce by 44.0 kB

Original 1.1 MB
After minification 1.0 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. Seisen images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 464.4 kB

Original 660.9 kB
After minification 603.4 kB
After compression 196.5 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 464.4 kB or 70% of the original size.

CSS Optimization

-85%

Potential reduce by 217.0 kB

Original 256.0 kB
After minification 142.5 kB
After compression 38.9 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. Seisen.com needs all CSS files to be minified and compressed as it can save up to 217.0 kB or 85% of the original size.

Requests Now

115

After Optimization

The browser has sent 115 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Seisen. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 42 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

[aria-hidden="true"] elements contain focusable descendents

High

ARIA input fields do not have accessible names

High

[role]s are not contained by their required parent element

High

ARIA IDs are not unique

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Links do not have descriptive text

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

EN
Language Claimed

N/A
Encoding

ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Seisen.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Seisen.com main page’s claimed encoding is iso-8859-1. 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.

Social Sharing Optimization

seisen.com

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Seisen International School in Tokyo - Kindergarten to Grade 12 Catholic IB

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

seisen.com

www.seisen.com

dc.js

si_behaviors-c.js

si_onload.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

seisen.com

www.seisen.com

dc.js

si_behaviors-c.js

si_onload.js

jQuery.js

jquery.cycle.pack.js

jquery_onload.js

base.css

news.css

calendar.css

gallery.css

academics.css

athletics.css

directory.css

notes.css

resource.css

home.css

jquery.touchSwipe.min.js

jquery.carouFredSel-6.1.0-packed.js

jquery.cycle.all.js

home.js

news.css

mashup.css

reset.css

structure.css

navigation.css

html.css

misc.css

module.css

gallery.css

directory.css

css

css

css

module.css

print.css

__utm.gif

index.aspx

body.gif

container.gif

crest.png

nav-main.gif