Tools & Wizards About Us
mask.co.jp screenshot

Report Summary

  • 86

    Performance

    Renders faster than
    89% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 58

    SEO

    Google-friendlier than
    21% of websites

mask.co.jp

マスク専門ホームページ（マスクのポータルサイト）

Page Load Speed

3.9 sec in total

First Response

1.4 sec

Resources Loaded

2.3 sec

Page Rendered

105 ms

mask.co.jp screenshot

About Website

Visit mask.co.jp now to see the best up-to-date Mask content for Japan and also check out these interesting facts you probably never knew about mask.co.jp

健康になるために花粉マスク、サージカルマスク、活性炭マスク、防じん防毒マスクなどから適切なマスクを選択するお手伝いします。　9000円以上の購入で送料無料です。

Visit mask.co.jp

Key Findings

We analyzed Mask.co.jp page load time and found that the first response time was 1.4 sec and then it took 2.4 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

mask.co.jp performance score

86

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

76/100

10%

LCP (Largest Contentful Paint)

Value3.1 s

74/100

25%

SI (Speed Index)

Value3.7 s

85/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.05

99/100

15%

TTI (Time to Interactive)

Value4.8 s

79/100

10%

Network Requests Diagram

mask.co.jp

1424 ms

animate.js

711 ms

ga.js

33 ms

top_r1_c1.gif

201 ms

headline03.gif

342 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 68% of them (21 requests) were addressed to the original Mask.co.jp, 19% (6 requests) were made to Google.com and 6% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Mask.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 74.3 kB (21%)

Content Size

353.6 kB

After Optimization

279.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Mask.co.jp main page is 353.6 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 199.1 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 55.7 kB

  • Original 64.1 kB
  • After minification 39.1 kB
  • After compression 8.4 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 25.0 kB, which is 39% 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 55.7 kB or 87% of the original size.

Image Optimization

-1%

Potential reduce by 762 B

  • Original 80.1 kB
  • After minification 79.3 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. Mask images are well optimized though.

JavaScript Optimization

-7%

Potential reduce by 14.5 kB

  • Original 199.1 kB
  • After minification 194.7 kB
  • After compression 184.6 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

-32%

Potential reduce by 3.3 kB

  • Original 10.4 kB
  • After minification 10.4 kB
  • After compression 7.1 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. Mask.co.jp needs all CSS files to be minified and compressed as it can save up to 3.3 kB or 32% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (50%)

Requests Now

30

After Optimization

15

  • Images
  • JavaScript
  • CSS

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mask. 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

mask.co.jp

mask.co.jp

1424 ms

animate.js

animate.js

711 ms

ga.js

ga.js

33 ms

top_r1_c1.gif

top_r1_c1.gif

201 ms

headline03.gif

headline03.gif

342 ms

top_r4_c2.gif

top_r4_c2.gif

348 ms

top_r4_c3.gif

top_r4_c3.gif

348 ms

top_r4_c4.gif

top_r4_c4.gif

356 ms

top_r4_c5.gif

top_r4_c5.gif

360 ms

top_r4_c7.gif

top_r4_c7.gif

365 ms

top_r4_c9.gif

top_r4_c9.gif

519 ms

top_r5_c3.gif

top_r5_c3.gif

521 ms

top_r5_c7.gif

top_r5_c7.gif

521 ms

top_r2_c8.gif

top_r2_c8.gif

533 ms

front111.jpg

front111.jpg

1073 ms

80u2w.jpg

80u2w.jpg

727 ms

front13.jpg

front13.jpg

694 ms

front101.jpg

front101.jpg

1036 ms

703 ms

top_orange.gif

top_orange.gif

711 ms

top_green.gif

top_green.gif

869 ms

top_purple.gif

top_purple.gif

875 ms

cse.js

cse.js

60 ms

__utm.gif

__utm.gif

12 ms

cse_element__ja.js

cse_element__ja.js

24 ms

default+ja.css

default+ja.css

51 ms

default.css

default.css

54 ms

async-ads.js

async-ads.js

30 ms

branding.png

branding.png

25 ms

clear.png

clear.png

17 ms

nav_logo114.png

nav_logo114.png

18 ms

Accessibility Review

mask.co.jp accessibility score

84

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Links do not have a discernible name

Best Practices

mask.co.jp best practices score

67

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

SEO Factors

mask.co.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

Links do not have descriptive text

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 Mask.co.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 Mask.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

mask.co.jp

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