Tools & Wizards About Us
zip-code.jp screenshot

Report Summary

  • 45

    Performance

    Renders faster than
    64% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 74% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

zip-code.jp

日本郵便番号検索ジップコードJP

Page Load Speed

3.4 sec in total

First Response

527 ms

Resources Loaded

2.8 sec

Page Rendered

118 ms

zip-code.jp screenshot

About Website

Visit zip-code.jp now to see the best up-to-date Zip Code content for Japan and also check out these interesting facts you probably never knew about zip-code.jp

郵便番号検索ジップコード.jpは、郵便番号から住所、または住所から郵便番号を検索します。郵政事業株式会社発行の最新データを使用しています。

Visit zip-code.jp

Key Findings

We analyzed Zip-code.jp page load time and found that the first response time was 527 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

zip-code.jp performance score

45

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

31/100

10%

LCP (Largest Contentful Paint)

Value3.6 s

60/100

25%

SI (Speed Index)

Value6.6 s

37/100

10%

TBT (Total Blocking Time)

Value1,180 ms

21/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value10.8 s

22/100

10%

Network Requests Diagram

zip-code.jp

527 ms

www.zip-code.jp

1203 ms

reset.css

187 ms

basic.css

374 ms

common.css

531 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that 55% of them (12 requests) were addressed to the original Zip-code.jp, 9% (2 requests) were made to Pagead2.googlesyndication.com and 9% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Zip-code.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 15.7 kB (5%)

Content Size

312.3 kB

After Optimization

296.6 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Zip-code.jp main page is 312.3 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. 25% of websites need less resources to load. Javascripts take 291.0 kB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 7.7 kB

  • Original 11.1 kB
  • After minification 9.9 kB
  • After compression 3.4 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 1.3 kB, which is 11% 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 7.7 kB or 69% of the original size.

JavaScript Optimization

-0%

Potential reduce by 132 B

  • Original 291.0 kB
  • After minification 291.0 kB
  • After compression 290.9 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

-78%

Potential reduce by 7.9 kB

  • Original 10.2 kB
  • After minification 5.7 kB
  • After compression 2.2 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. Zip-code.jp needs all CSS files to be minified and compressed as it can save up to 7.9 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (53%)

Requests Now

19

After Optimization

9

  • Images
  • JavaScript
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zip Code. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zip-code.jp

zip-code.jp

527 ms

www.zip-code.jp

www.zip-code.jp

1203 ms

reset.css

reset.css

187 ms

basic.css

basic.css

374 ms

common.css

common.css

531 ms

css

css

49 ms

index.css

index.css

536 ms

jquery.min.js

jquery.min.js

36 ms

flexibility.js

flexibility.js

48 ms

autotrack.js

autotrack.js

26 ms

js

js

86 ms

adsbygoogle.js

adsbygoogle.js

187 ms

ga.js

ga.js

110 ms

symbol.svg

symbol.svg

187 ms

icon-map.svg

icon-map.svg

178 ms

icon-company.svg

icon-company.svg

182 ms

icon-number.svg

icon-number.svg

283 ms

icon-news.svg

icon-news.svg

355 ms

icon-contact.svg

icon-contact.svg

363 ms

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFBEj35TS1Q.woff

-F6jfjtqLzI2JPCgQBnw7HFyzSD-AsregP8VFBEj35TS1Q.woff

85 ms

show_ads_impl.js

show_ads_impl.js

399 ms

__utm.gif

__utm.gif

12 ms

Accessibility Review

zip-code.jp accessibility score

90

Accessibility Issues

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

zip-code.jp best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

zip-code.jp SEO score

100

Search Engine Optimization Advices

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

High

Document uses legible font sizes

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 Zip-code.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 Zip-code.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

zip-code.jp

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