Tools & Wizards About Us
calendars.cz screenshot

Report Summary

  • 82

    Performance

    Renders faster than
    87% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

calendars.cz

Mediální skupina | Czech Online Media s.r.o.

Page Load Speed

3.4 sec in total

First Response

657 ms

Resources Loaded

2.7 sec

Page Rendered

70 ms

calendars.cz screenshot

About Website

Click here to check amazing Calendars content. Otherwise, check out these important facts you probably never knew about calendars.cz

Czech Online Media s.r.o. / internetová média, reportáže, rozhovory, zajímavosti, nabídky, reklama

Visit calendars.cz

Key Findings

We analyzed Calendars.cz page load time and found that the first response time was 657 ms and then it took 2.7 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

calendars.cz performance score

82

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

76/100

10%

LCP (Largest Contentful Paint)

Value2.4 s

91/100

25%

SI (Speed Index)

Value4.4 s

73/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.349

31/100

15%

TTI (Time to Interactive)

Value2.2 s

99/100

10%

Network Requests Diagram

calendars.cz

657 ms

czechonlinemedia.cz

986 ms

bootstrap.min.css

458 ms

style.css

333 ms

jquery.js

878 ms

Our browser made a total of 7 requests to load all elements on the main page. We found that 14% of them (1 request) were addressed to the original Calendars.cz, 86% (6 requests) were made to Czechonlinemedia.cz. The less responsive or slowest element that took the longest time to load (986 ms) relates to the external source Czechonlinemedia.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 335.2 kB (72%)

Content Size

467.6 kB

After Optimization

132.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Calendars.cz main page is 467.6 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. Only 10% of websites need less resources to load. Javascripts take 313.2 kB which makes up the majority of the site volume.

HTML Optimization

-59%

Potential reduce by 1.5 kB

  • Original 2.5 kB
  • After minification 2.3 kB
  • After compression 1.0 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. 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 1.5 kB or 59% of the original size.

Image Optimization

-18%

Potential reduce by 4.9 kB

  • Original 27.0 kB
  • After minification 22.1 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, Calendars needs image optimization as it can save up to 4.9 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-71%

Potential reduce by 221.9 kB

  • Original 313.2 kB
  • After minification 313.2 kB
  • After compression 91.3 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 221.9 kB or 71% of the original size.

CSS Optimization

-86%

Potential reduce by 106.9 kB

  • Original 124.9 kB
  • After minification 124.1 kB
  • After compression 18.0 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. Calendars.cz needs all CSS files to be minified and compressed as it can save up to 106.9 kB or 86% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

5

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 5 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Calendars. According to our analytics all requests are already optimized.

Network Requests Diagram

calendars.cz

calendars.cz

657 ms

czechonlinemedia.cz

czechonlinemedia.cz

986 ms

bootstrap.min.css

bootstrap.min.css

458 ms

style.css

style.css

333 ms

jquery.js

jquery.js

878 ms

bootstrap.min.js

bootstrap.min.js

450 ms

cropped-logo-com-300x300.png

cropped-logo-com-300x300.png

118 ms

Accessibility Review

calendars.cz accessibility score

68

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

Document doesn't have a <title> element

High

Image elements do not have [alt] attributes

Best Practices

calendars.cz best practices score

83

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

calendars.cz SEO score

62

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

Document doesn't have a <title> element

High

Image elements do not have [alt] attributes

Crawling and Indexing

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

Impact

Issue

High

Page is blocked from indexing

High

robots.txt is not valid

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

    CS

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Calendars.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it does not match the claimed English language. Our system also found out that Calendars.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

calendars.cz

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