Report Summary

  • 54

    Performance

    Renders faster than
    71% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 46% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

odbornecasopisy.cz

Odborné časopisy

Page Load Speed

5.1 sec in total

First Response

308 ms

Resources Loaded

4.5 sec

Page Rendered

275 ms

odbornecasopisy.cz screenshot

About Website

Welcome to odbornecasopisy.cz homepage info - get ready to check Odbornecasopisy best content for Czech Republic right away, or after learning these important things about odbornecasopisy.cz

FCC PUBLIC vydává elektrotechnické časopisy ELEKTRO a SVĚTLO a publikace věnované tématům elektrotechniky, osvětlování, energetiky, managementu a duševního vlastnictví. Nakladatelství pořádá odborné s...

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Key Findings

We analyzed Odbornecasopisy.cz page load time and found that the first response time was 308 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

odbornecasopisy.cz performance score

54

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

11/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

27/100

25%

SI (Speed Index)

Value7.8 s

23/100

10%

TBT (Total Blocking Time)

Value250 ms

84/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value9.1 s

33/100

10%

Network Requests Diagram

odbornecasopisy.cz

308 ms

www.odbornecasopisy.cz

1978 ms

cssloader-d96c4031df76.css

195 ms

css

20 ms

jquery-1.11.1.min.js

292 ms

Our browser made a total of 40 requests to load all elements on the main page. We found that 75% of them (30 requests) were addressed to the original Odbornecasopisy.cz, 8% (3 requests) were made to Google-analytics.com and 5% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Odbornecasopisy.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 381.0 kB (35%)

Content Size

1.1 MB

After Optimization

694.3 kB

In fact, the total size of Odbornecasopisy.cz main page is 1.1 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. 65% of websites need less resources to load. Images take 629.4 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 226.1 kB

  • Original 261.6 kB
  • After minification 261.6 kB
  • After compression 35.5 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 226.1 kB or 86% of the original size.

Image Optimization

-25%

Potential reduce by 154.6 kB

  • Original 629.4 kB
  • After minification 474.8 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, Odbornecasopisy needs image optimization as it can save up to 154.6 kB or 25% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 142 B

  • Original 161.6 kB
  • After minification 161.6 kB
  • After compression 161.4 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

-1%

Potential reduce by 148 B

  • Original 22.7 kB
  • After minification 22.7 kB
  • After compression 22.5 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. Odbornecasopisy.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 7 (19%)

Requests Now

36

After Optimization

29

The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Odbornecasopisy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

odbornecasopisy.cz accessibility score

78

Accessibility Issues

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

Buttons do not have an accessible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

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

odbornecasopisy.cz best practices score

75

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

odbornecasopisy.cz SEO score

98

Search Engine Optimization Advices

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    N/A

  • Encoding

    UTF-8

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

Open Graph data is detected on the main page of Odbornecasopisy. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: