Access b7.cz. B7 design - weby, eshopy, programov?n?, online a mobiln? aplikace na m?ru, API

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

38/100

10%

LCP (Largest Contentful Paint)

Value7.9 s

3/100

25%

SI (Speed Index)

Value7.0 s

33/100

10%

TBT (Total Blocking Time)

Value340 ms

74/100

30%

CLS (Cumulative Layout Shift)

Value0.042

99/100

15%

TTI (Time to Interactive)

Value9.1 s

33/100

10%

b7.cz

316 ms

b7.cz

526 ms

css

104 ms

fonts.css

114 ms

bootstrap.min.css

340 ms

Our browser made a total of 141 requests to load all elements on the main page. We found that 55% of them (78 requests) were addressed to the original B7.cz, 23% (32 requests) were made to Google.com and 9% (13 requests) were made to Maps.googleapis.com. The less responsive or slowest element that took the longest time to load (19.7 sec) relates to the external source Toplist.cz.

Content Size

4.4 MB

After Optimization

4.3 MB

In fact, the total size of B7.cz main page is 4.4 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 3.9 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 29.7 kB

Original 34.9 kB
After minification 21.4 kB
After compression 5.2 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 13.5 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 29.7 kB or 85% of the original size.

Image Optimization

-1%

Potential reduce by 24.0 kB

Original 3.9 MB
After minification 3.9 MB

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. B7 images are well optimized though.

JavaScript Optimization

-25%

Potential reduce by 105.2 kB

Original 420.9 kB
After minification 420.9 kB
After compression 315.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 105.2 kB or 25% of the original size.

CSS Optimization

-7%

Potential reduce by 2.2 kB

Original 29.5 kB
After minification 29.2 kB
After compression 27.3 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. B7.cz has all CSS files already compressed.

Requests Now

119

After Optimization

The browser has sent 119 CSS, Javascripts, AJAX and image requests in order to completely render the main page of B7. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

ARIA IDs are not unique

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.

Low

No form fields have multiple labels

High

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

Search Engine Optimization Advices

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

High

Links are not crawlable

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/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

N/A
Language Claimed

CS
Encoding

WINDOWS-1250

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise B7.cz can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Czech. Our system also found out that B7.cz main page’s claimed encoding is windows-1250. 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

b7.cz

Open Graph description is not detected on the main page of B7. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

B7 design - weby, eshopy, programov?n?, online a mobiln? aplikace na m?ru, API

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

b7.cz

b7.cz

css

fonts.css

bootstrap.min.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

b7.cz

b7.cz

css

fonts.css

bootstrap.min.css

select2.css

gray.css

magnific-popup.css

form-elements.css

buttons.css

style.css

media-queries.css

loga.jpg

embed

jquery-1.10.2.min.js

bootstrap.min.js

jquery.backstretch.min.js

masonry.pkgd.min.js

js

froogaloop2.min.js

jquery.ui.map.min.js

select2.min.js

jquery.gray.min.js

jquery.magnific-popup.min.js

scripts.js

retina-1.1.0.min.js

desktop.png

web.png

api.png

mobil.png

hosting.png

seo.png

open.png

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