Access edo-tokyo-museum.or.jp. 江戸東京博物館

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value7.3 s

5/100

25%

SI (Speed Index)

Value9.7 s

11/100

10%

TBT (Total Blocking Time)

Value150 ms

94/100

30%

CLS (Cumulative Layout Shift)

Value1.109

1/100

15%

TTI (Time to Interactive)

Value8.7 s

36/100

10%

edo-tokyo-museum.or.jp

786 ms

js

66 ms

layout.css

822 ms

add.css

347 ms

layout_top.css

517 ms

Our browser made a total of 106 requests to load all elements on the main page. We found that 79% of them (84 requests) were addressed to the original Edo-tokyo-museum.or.jp, 7% (7 requests) were made to F1-as.readspeaker.com and 7% (7 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (5.3 sec) belongs to the original domain Edo-tokyo-museum.or.jp.

Content Size

2.9 MB

After Optimization

2.6 MB

In fact, the total size of Edo-tokyo-museum.or.jp main page is 2.9 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. 50% of websites need less resources to load. Images take 2.5 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 49.7 kB

Original 59.2 kB
After minification 38.8 kB
After compression 9.5 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 20.4 kB, which is 35% 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 49.7 kB or 84% of the original size.

Image Optimization

-9%

Potential reduce by 217.6 kB

Original 2.5 MB
After minification 2.3 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. Edo Tokyo Museum images are well optimized though.

JavaScript Optimization

-6%

Potential reduce by 18.3 kB

Original 323.0 kB
After minification 322.7 kB
After compression 304.7 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. This website has mostly compressed JavaScripts.

CSS Optimization

-23%

Potential reduce by 12.6 kB

Original 55.2 kB
After minification 55.2 kB
After compression 42.7 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. Edo-tokyo-museum.or.jp needs all CSS files to be minified and compressed as it can save up to 12.6 kB or 23% of the original size.

Requests Now

104

After Optimization

The browser has sent 104 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Edo Tokyo Museum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

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

Search Engine Optimization Advices

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

High

Links are not crawlable

High

robots.txt is not valid

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

High

Image elements do not have [alt] attributes

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

JA
Language Claimed

JA
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Edo-tokyo-museum.or.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 Edo-tokyo-museum.or.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

edo-tokyo-museum.or.jp

Open Graph data is detected on the main page of Edo Tokyo Museum. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

江戸東京博物館

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

edo-tokyo-museum.or.jp

js

layout.css

add.css

layout_top.css

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

edo-tokyo-museum.or.jp

js

layout.css

add.css

layout_top.css

slick.css

jquery.js

jquery.cookie.js

jquery.textresizer.min.js

common.js

slick.min.js

owl.carousel.min.js

jquery.heightLine.js

top_jp.js

print_table.js

ReadSpeaker.js

moment.min.js

my_script.js

ReadSpeaker.Styles.css

ReadSpeaker.Core.js

ReadSpeaker.pub.Config.js

logo01.gif

cse.js

rs_button.png

bg_body01.gif

btn_header_fb_min.png

btn_header_tw_min.png

btn_header_insta_min.png

btn_header_yt_min.png

btn_access01_large.png

btn_access01_no.png

btn_access01_on.gif

btn_contact01_large.png

btn_contact01_no.png

btn_language01_large.png

btn_language01_no.png

txt_language01.png

txt_language02.png

txt_language03.png

txt_language04.png

txt_language05.png

btn_font_size01_large.png

btn_font_size01_no.png