Report Summary

  • 92

    Performance

    Renders faster than
    92% of other websites

  • 45

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

er.cz

ER.cz - p?esm?rov?n? a nov? dom?na zdarma pro V? web

Page Load Speed

3.2 sec in total

First Response

398 ms

Resources Loaded

2.7 sec

Page Rendered

99 ms

er.cz screenshot

About Website

Click here to check amazing ER content for Czech Republic. Otherwise, check out these important facts you probably never knew about er.cz

Nejkvalitn?j?? p?esm?rov?n? pro V? web, kter? m??ete z?skat zdarma! Krom? samotn?ho p?esm?rov?n? 3. ??du (dvoup?smen? dom?ny er.cz), v?m nab?z?me tak? e-mailov? alias, statistiky, velk? mo?nosti nasta...

Visit er.cz

Key Findings

We analyzed Er.cz page load time and found that the first response time was 398 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

er.cz performance score

92

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.9 s

86/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

79/100

25%

SI (Speed Index)

Value2.9 s

95/100

10%

TBT (Total Blocking Time)

Value60 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.4 s

93/100

10%

Network Requests Diagram

er.cz

398 ms

www.er.cz

1117 ms

styly2.css

107 ms

d.js

49 ms

b

359 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that 73% of them (16 requests) were addressed to the original Er.cz, 14% (3 requests) were made to D.wedosas.net and 5% (1 request) were made to I.czin.eu. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Er.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 27.3 kB (31%)

Content Size

88.6 kB

After Optimization

61.3 kB

In fact, the total size of Er.cz main page is 88.6 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. HTML takes 32.7 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 25.8 kB

  • Original 32.7 kB
  • After minification 26.2 kB
  • After compression 6.9 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 6.5 kB, which is 20% 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 25.8 kB or 79% of the original size.

Image Optimization

-4%

Potential reduce by 1.3 kB

  • Original 32.5 kB
  • After minification 31.1 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. ER images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 87 B

  • Original 22.7 kB
  • After minification 22.7 kB
  • After compression 22.6 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

-11%

Potential reduce by 80 B

  • Original 725 B
  • After minification 725 B
  • After compression 645 B

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. Er.cz needs all CSS files to be minified and compressed as it can save up to 80 B or 11% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (30%)

Requests Now

20

After Optimization

14

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ER. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Review

er.cz accessibility score

45

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

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

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

Best Practices

er.cz best practices score

75

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

SEO Factors

er.cz SEO score

69

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

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    WINDOWS-1250

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Er.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Er.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

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