Tools & Wizards About Us
4blackbox.com screenshot

Report Summary

  • 97

    Performance

    Renders faster than
    94% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

4blackbox.com

4blackbox Solutions - Digital Privacy & Cyber Security Technologies - AARTKOM s.r.o.

Page Load Speed

3.8 sec in total

First Response

967 ms

Resources Loaded

2.6 sec

Page Rendered

255 ms

4blackbox.com screenshot

About Website

Visit 4blackbox.com now to see the best up-to-date 4 Blackbox content and also check out these interesting facts you probably never knew about 4blackbox.com

Providing digital privacy and cyber security solutions. Supporting opensource tools with black box approach and best practicies policies application. Protecting data of management, teachers, students ...

Visit 4blackbox.com

Key Findings

We analyzed 4blackbox.com page load time and found that the first response time was 967 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

4blackbox.com performance score

97

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

97/100

10%

LCP (Largest Contentful Paint)

Value2.2 s

95/100

25%

SI (Speed Index)

Value3.5 s

88/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.4 s

100/100

10%

Network Requests Diagram

4blackbox.com

967 ms

4blackbox.com

507 ms

4bb-home-main.css

114 ms

4bb-home-hover.css

225 ms

KH-Kraj-PrezentaceStudentu-v1902.jpeg

550 ms

Our browser made a total of 21 requests to load all elements on the main page. We found that all of those requests were addressed to 4blackbox.com and no external sources were called. The less responsive or slowest element that took the longest time to load (967 ms) belongs to the original domain 4blackbox.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 160.5 kB (16%)

Content Size

1.0 MB

After Optimization

840.8 kB

  • HTML
  • Images
  • CSS

In fact, the total size of 4blackbox.com main page is 1.0 MB. 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. Images take 977.0 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 15.8 kB

  • Original 19.8 kB
  • After minification 16.3 kB
  • After compression 4.0 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 3.6 kB, which is 18% 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 15.8 kB or 80% of the original size.

Image Optimization

-15%

Potential reduce by 143.5 kB

  • Original 977.0 kB
  • After minification 833.5 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. Obviously, 4 Blackbox needs image optimization as it can save up to 143.5 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-26%

Potential reduce by 1.2 kB

  • Original 4.5 kB
  • After minification 4.5 kB
  • After compression 3.3 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. 4blackbox.com needs all CSS files to be minified and compressed as it can save up to 1.2 kB or 26% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

19

After Optimization

19

  • AJAX
  • Images
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 4 Blackbox. According to our analytics all requests are already optimized.

Network Requests Diagram

4blackbox.com

4blackbox.com

967 ms

4blackbox.com

4blackbox.com

507 ms

4bb-home-main.css

4bb-home-main.css

114 ms

4bb-home-hover.css

4bb-home-hover.css

225 ms

KH-Kraj-PrezentaceStudentu-v1902.jpeg

KH-Kraj-PrezentaceStudentu-v1902.jpeg

550 ms

RizeniSkol-Special2019-1.jpeg

RizeniSkol-Special2019-1.jpeg

563 ms

AK-LOGO-white.png

AK-LOGO-white.png

577 ms

SIT-logo.png

SIT-logo.png

601 ms

Netsweeper-LOGO-white.png

Netsweeper-LOGO-white.png

457 ms

SSIS-logo.png

SSIS-logo.png

346 ms

i4wifi_LOGO-white.png

i4wifi_LOGO-white.png

593 ms

Logo-NielsenMeinl.png

Logo-NielsenMeinl.png

682 ms

NCBI_logo_transparent.png

NCBI_logo_transparent.png

664 ms

SSPS-LOGO-white.png

SSPS-LOGO-white.png

674 ms

showtime.php

showtime.php

687 ms

DigiKoalice-LOGO-color.png

DigiKoalice-LOGO-color.png

703 ms

DSJC-Member-LOGO-white.png

DSJC-Member-LOGO-white.png

836 ms

4bb-BackgroundPIC.png

4bb-BackgroundPIC.png

885 ms

BannerShortA.png

BannerShortA.png

572 ms

BannerShortC.png

BannerShortC.png

586 ms

BannerLong.png

BannerLong.png

711 ms

Accessibility Review

4blackbox.com accessibility score

93

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

Best Practices

4blackbox.com best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

SEO Factors

4blackbox.com SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 4blackbox.com can be misinterpreted by Google and other search engines. Our service has detected that English 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 4blackbox.com 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

4blackbox.com

Open Graph description is not detected on the main page of 4 Blackbox. 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: