Tools & Wizards About Us
blacksilica.info screenshot

Report Summary

  • 65

    Performance

    Renders faster than
    78% of other websites

  • 70

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

blacksilica.info

ブラックシリカ.info 厚生労働省認可医療機器ジュエリーブラックシリカネックレス

Page Load Speed

3.3 sec in total

First Response

528 ms

Resources Loaded

2.5 sec

Page Rendered

249 ms

blacksilica.info screenshot

About Website

Welcome to blacksilica.info homepage info - get ready to check Blacksilica best content right away, or after learning these important things about blacksilica.info

ブラックシリカ.info 磁気治療器が美しいジュエリーに。医療機器ジュエリー「ブラックシリカネックレス」をご紹介します。ブラックシリカネックレスには、遠赤外線、神経の乱れを整える、磁気治療機器の3つの効果があります。

Visit blacksilica.info

Key Findings

We analyzed Blacksilica.info page load time and found that the first response time was 528 ms and then it took 2.8 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

blacksilica.info performance score

65

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

25/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

52/100

25%

SI (Speed Index)

Value5.7 s

51/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.275

44/100

15%

TTI (Time to Interactive)

Value4.8 s

79/100

10%

Network Requests Diagram

blacksilica.info

528 ms

www.blacksilica.info

937 ms

style.css

178 ms

smart.css

354 ms

reset.css

529 ms

Our browser made a total of 32 requests to load all elements on the main page. We found that 78% of them (25 requests) were addressed to the original Blacksilica.info, 6% (2 requests) were made to Connect.facebook.net and 3% (1 request) were made to Alljewelry.jp. The less responsive or slowest element that took the longest time to load (937 ms) belongs to the original domain Blacksilica.info.

Page Optimization Overview & Recommendations

Page size can be reduced by 26.7 kB (20%)

Content Size

136.3 kB

After Optimization

109.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Blacksilica.info main page is 136.3 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. 20% of websites need less resources to load. Images take 93.2 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 25.6 kB

  • Original 34.6 kB
  • After minification 33.1 kB
  • After compression 9.1 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 25.6 kB or 74% of the original size.

Image Optimization

-0%

Potential reduce by 21 B

  • Original 93.2 kB
  • After minification 93.2 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. Blacksilica images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 0 B

  • Original 3.4 kB
  • After minification 3.4 kB
  • After compression 3.4 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

-22%

Potential reduce by 1.1 kB

  • Original 5.0 kB
  • After minification 5.0 kB
  • After compression 3.9 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. Blacksilica.info needs all CSS files to be minified and compressed as it can save up to 1.1 kB or 22% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (34%)

Requests Now

29

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Blacksilica. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

blacksilica.info

blacksilica.info

528 ms

www.blacksilica.info

www.blacksilica.info

937 ms

style.css

style.css

178 ms

smart.css

smart.css

354 ms

reset.css

reset.css

529 ms

camp.css

camp.css

278 ms

hed_rogo.jpg

hed_rogo.jpg

496 ms

hed_kou.jpg

hed_kou.jpg

527 ms

hed_arogo.jpg

hed_arogo.jpg

512 ms

mainimage.jpg

mainimage.jpg

703 ms

lazysizes.min.js

lazysizes.min.js

660 ms

twitter.png

twitter.png

681 ms

instagram.png

instagram.png

691 ms

youtube.png

youtube.png

690 ms

facebook.png

facebook.png

783 ms

oct.js

oct.js

17 ms

container_bg.jpg

container_bg.jpg

269 ms

hed_back2.jpg

hed_back2.jpg

296 ms

sdk.js

sdk.js

17 ms

adsct

adsct

58 ms

adsct

adsct

81 ms

sdk.js

sdk.js

7 ms

53 ms

container_bg2.gif

container_bg2.gif

191 ms

title_01.gif

title_01.gif

192 ms

b_img01.jpg

b_img01.jpg

214 ms

title_02.gif

title_02.gif

294 ms

title_03.gif

title_03.gif

324 ms

title_05.gif

title_05.gif

356 ms

b_img02.jpg

b_img02.jpg

354 ms

title_sean.gif

title_sean.gif

358 ms

b_img03.jpg

b_img03.jpg

388 ms

Accessibility Review

blacksilica.info accessibility score

70

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

blacksilica.info 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

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

blacksilica.info SEO score

92

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

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blacksilica.info 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 Blacksilica.info 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

blacksilica.info

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