Tools & Wizards About Us

Report Summary

  • 43

    Performance

    Renders faster than
    62% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 34% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 71

    SEO

    Google-friendlier than
    30% of websites

kagakueizo.org

科学映像館

Page Load Speed

5.7 sec in total

First Response

549 ms

Resources Loaded

4.9 sec

Page Rendered

232 ms

About Website

Click here to check amazing Kagakueizo content for Japan. Otherwise, check out these important facts you probably never knew about kagakueizo.org

科学映像館は、原版フィルムから高画質のデジタル化を押し進め保管するとともに、忘れ去られようとしている科学映像をインターネットから配信しています。

Visit kagakueizo.org

Key Findings

We analyzed Kagakueizo.org page load time and found that the first response time was 549 ms and then it took 5.1 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

kagakueizo.org performance score

43

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value6.9 s

6/100

25%

SI (Speed Index)

Value6.6 s

38/100

10%

TBT (Total Blocking Time)

Value580 ms

51/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.9 s

54/100

10%

Network Requests Diagram

kagakueizo.org

549 ms

www.kagakueizo.org

527 ms

www.kagakueizo.org

1049 ms

import.css

172 ms

rollover.js

344 ms

Our browser made a total of 83 requests to load all elements on the main page. We found that 94% of them (78 requests) were addressed to the original Kagakueizo.org, 2% (2 requests) were made to Ssl.google-analytics.com and 2% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Kagakueizo.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 99.7 kB (28%)

Content Size

360.7 kB

After Optimization

261.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kagakueizo.org main page is 360.7 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. 20% of websites need less resources to load. Images take 192.1 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 94.9 kB

  • Original 118.9 kB
  • After minification 118.7 kB
  • After compression 24.0 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. 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 94.9 kB or 80% of the original size.

Image Optimization

-0%

Potential reduce by 20 B

  • Original 192.1 kB
  • After minification 192.1 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. Kagakueizo images are well optimized though.

JavaScript Optimization

-6%

Potential reduce by 2.6 kB

  • Original 43.2 kB
  • After minification 42.7 kB
  • After compression 40.5 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. This website has mostly compressed JavaScripts.

CSS Optimization

-34%

Potential reduce by 2.2 kB

  • Original 6.5 kB
  • After minification 6.1 kB
  • After compression 4.3 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. Kagakueizo.org needs all CSS files to be minified and compressed as it can save up to 2.2 kB or 34% of the original size.

Requests Breakdown

Number of requests can be reduced by 21 (30%)

Requests Now

69

After Optimization

48

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 69 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kagakueizo. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

kagakueizo.org accessibility score

69

Accessibility Issues

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

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

Best Practices

kagakueizo.org best practices score

58

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

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

kagakueizo.org SEO score

71

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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 Kagakueizo.org 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 Kagakueizo.org 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

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