Report Summary

  • 87

    Performance

    Renders faster than
    90% of other websites

  • 44

    Accessibility

    Visual factors better than
    that of 18% of websites

  • 62

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 58

    SEO

    Google-friendlier than
    20% of websites

saitama-city.ed.jp

さいたま市立教育研究所

Page Load Speed

4.7 sec in total

First Response

1.5 sec

Resources Loaded

2.9 sec

Page Rendered

292 ms

saitama-city.ed.jp screenshot

About Website

Click here to check amazing Saitama City content for Japan. Otherwise, check out these important facts you probably never knew about saitama-city.ed.jp

Visit saitama-city.ed.jp

Key Findings

We analyzed Saitama-city.ed.jp page load time and found that the first response time was 1.5 sec and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

saitama-city.ed.jp performance score

87

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

79/100

10%

LCP (Largest Contentful Paint)

Value2.3 s

93/100

25%

SI (Speed Index)

Value4.8 s

68/100

10%

TBT (Total Blocking Time)

Value150 ms

94/100

30%

CLS (Cumulative Layout Shift)

Value0.161

73/100

15%

TTI (Time to Interactive)

Value2.6 s

98/100

10%

Network Requests Diagram

saitama-city.ed.jp

1507 ms

color.css

342 ms

b_01a.gif

358 ms

b_01b.gif

362 ms

js_sdo.gif

362 ms

Our browser made a total of 48 requests to load all elements on the main page. We found that all of those requests were addressed to Saitama-city.ed.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Saitama-city.ed.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 67.1 kB (54%)

Content Size

123.1 kB

After Optimization

56.0 kB

In fact, the total size of Saitama-city.ed.jp main page is 123.1 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. 15% of websites need less resources to load. HTML takes 68.0 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 61.6 kB

  • Original 68.0 kB
  • After minification 45.2 kB
  • After compression 6.5 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 22.8 kB, which is 34% 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 61.6 kB or 90% of the original size.

Image Optimization

-10%

Potential reduce by 5.3 kB

  • Original 54.7 kB
  • After minification 49.4 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. Saitama City images are well optimized though.

CSS Optimization

-66%

Potential reduce by 267 B

  • Original 405 B
  • After minification 275 B
  • After compression 138 B

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. Saitama-city.ed.jp needs all CSS files to be minified and compressed as it can save up to 267 B or 66% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (16%)

Requests Now

45

After Optimization

38

The browser has sent 45 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Saitama City. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Review

saitama-city.ed.jp accessibility score

44

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

saitama-city.ed.jp best practices score

62

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

saitama-city.ed.jp SEO score

58

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

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Saitama-city.ed.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 Saitama-city.ed.jp 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.

Social Sharing Optimization

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