Tools & Wizards About Us
postcast.co.jp screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 37% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

postcast.co.jp

私書箱サービスPostCast - 私書箱・郵便転送・海外発送 -

Page Load Speed

3.8 sec in total

First Response

734 ms

Resources Loaded

2.8 sec

Page Rendered

239 ms

postcast.co.jp screenshot

About Website

Click here to check amazing Postcast content. Otherwise, check out these important facts you probably never knew about postcast.co.jp

私書箱サービス。会費だけで保管・転送手数料0円。しかも１週間で無料規定サイズ内であれば配送料\0コースあり。来店せずにサービススタート。駅から徒歩1分。

Visit postcast.co.jp

Key Findings

We analyzed Postcast.co.jp page load time and found that the first response time was 734 ms and then it took 3.1 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

postcast.co.jp performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.1 s

3/100

10%

LCP (Largest Contentful Paint)

Value6.4 s

9/100

25%

SI (Speed Index)

Value11.3 s

5/100

10%

TBT (Total Blocking Time)

Value2,670 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.174

69/100

15%

TTI (Time to Interactive)

Value16.2 s

5/100

10%

Network Requests Diagram

postcast.co.jp

734 ms

style.css

339 ms

si.js

59 ms

088599400

558 ms

ga.js

47 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 76% of them (34 requests) were addressed to the original Postcast.co.jp, 7% (3 requests) were made to X6.tiyogami.com and 4% (2 requests) were made to Smarticon.geotrust.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Postcast.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 20.1 kB (4%)

Content Size

451.0 kB

After Optimization

430.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Postcast.co.jp main page is 451.0 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 406.3 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 14.6 kB

  • Original 19.5 kB
  • After minification 19.0 kB
  • After compression 4.9 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 14.6 kB or 75% of the original size.

Image Optimization

-0%

Potential reduce by 35 B

  • Original 406.3 kB
  • After minification 406.3 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. Postcast images are well optimized though.

JavaScript Optimization

-7%

Potential reduce by 1.4 kB

  • Original 20.1 kB
  • After minification 20.1 kB
  • After compression 18.7 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

-81%

Potential reduce by 4.1 kB

  • Original 5.0 kB
  • After minification 4.6 kB
  • After compression 963 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. Postcast.co.jp needs all CSS files to be minified and compressed as it can save up to 4.1 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (23%)

Requests Now

43

After Optimization

33

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 43 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Postcast. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

postcast.co.jp

postcast.co.jp

734 ms

style.css

style.css

339 ms

si.js

si.js

59 ms

088599400

088599400

558 ms

ga.js

ga.js

47 ms

top_bnnr.gif

top_bnnr.gif

175 ms

top_img_01.jpg

top_img_01.jpg

928 ms

menu_bg.jpg

menu_bg.jpg

345 ms

menu_bg2.jpg

menu_bg2.jpg

350 ms

MASTER.gif

MASTER.gif

351 ms

VISA.gif

VISA.gif

525 ms

JCB.gif

JCB.gif

530 ms

AMEX.gif

AMEX.gif

515 ms

qr_code.jpg

qr_code.jpg

529 ms

mn_seino_bnnr.gif

mn_seino_bnnr.gif

525 ms

mn_ems_bnnr.gif

mn_ems_bnnr.gif

693 ms

mn_kuroneko_bnnr.gif

mn_kuroneko_bnnr.gif

698 ms

service_btn.jpg

service_btn.jpg

702 ms

signup_btn.jpg

signup_btn.jpg

703 ms

login_btn.jpg

login_btn.jpg

704 ms

index_osirase.gif

index_osirase.gif

864 ms

top_anatano.gif

top_anatano.gif

873 ms

top_cat_03.jpg

top_cat_03.jpg

1050 ms

top_cat_01.jpg

top_cat_01.jpg

880 ms

top_cat_02.jpg

top_cat_02.jpg

1097 ms

top_cat_04.jpg

top_cat_04.jpg

1206 ms

index_userkanri.jpg

index_userkanri.jpg

1215 ms

top_hitori.gif

top_hitori.gif

1054 ms

top_cat_05.jpg

top_cat_05.jpg

1103 ms

top_taninniha.gif

top_taninniha.gif

1223 ms

top_cat_06.jpg

top_cat_06.jpg

1234 ms

top_business.gif

top_business.gif

1272 ms

top_cat_07.jpg

top_cat_07.jpg

1281 ms

index_naiyoukakunin.jpg

index_naiyoukakunin.jpg

1551 ms

smarticon

smarticon

52 ms

dot.gif

dot.gif

1354 ms

top_cat_bg.jpg

top_cat_bg.jpg

1366 ms

footer_bg.gif

footer_bg.gif

1376 ms

__utm.gif

__utm.gif

13 ms

collect

collect

64 ms

Zen

Zen

329 ms

encount

encount

536 ms

p

p

349 ms

1.13.17

1.13.17

478 ms

sync

sync

183 ms

Accessibility Review

postcast.co.jp accessibility score

72

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

Links do not have a discernible name

Best Practices

postcast.co.jp best practices score

67

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

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

postcast.co.jp SEO score

85

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

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

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Postcast.co.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese 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 Postcast.co.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

postcast.co.jp

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