Tools & Wizards About Us
helion.cz screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 36% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

helion.cz

Fotovoltaické elektrárny, solární systémy, tepelná čerpadla, větrné elektrárny Trutnov a okolí

Page Load Speed

4.8 sec in total

First Response

420 ms

Resources Loaded

4.3 sec

Page Rendered

162 ms

helion.cz screenshot

About Website

Welcome to helion.cz homepage info - get ready to check Helion best content right away, or after learning these important things about helion.cz

helion.cz - Specialista na alternativní zdroje energie, Fotovoltaické elektrárny, solární systémy, tepelná čerpadla, větrné elektrárny Trutnov a okolí

Visit helion.cz

Key Findings

We analyzed Helion.cz page load time and found that the first response time was 420 ms and then it took 4.4 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

helion.cz performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.2 s

3/100

10%

LCP (Largest Contentful Paint)

Value12.7 s

0/100

25%

SI (Speed Index)

Value9.7 s

11/100

10%

TBT (Total Blocking Time)

Value790 ms

37/100

30%

CLS (Cumulative Layout Shift)

Value0.078

95/100

15%

TTI (Time to Interactive)

Value11.4 s

19/100

10%

Network Requests Diagram

helion.cz

420 ms

helion.cz

611 ms

js

56 ms

style.min.css

246 ms

DependencyHandler.axd

459 ms

Our browser made a total of 49 requests to load all elements on the main page. We found that 61% of them (30 requests) were addressed to the original Helion.cz, 12% (6 requests) were made to Api.mapy.cz and 6% (3 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Helion.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 514.0 kB (15%)

Content Size

3.4 MB

After Optimization

2.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Helion.cz main page is 3.4 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. 45% of websites need less resources to load. Images take 3.1 MB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 16.4 kB

  • Original 22.1 kB
  • After minification 17.6 kB
  • After compression 5.7 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 4.5 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 16.4 kB or 74% of the original size.

Image Optimization

-14%

Potential reduce by 430.7 kB

  • Original 3.1 MB
  • After minification 2.6 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. Obviously, Helion needs image optimization as it can save up to 430.7 kB or 14% 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 85 B

  • Original 194.5 kB
  • After minification 194.5 kB
  • After compression 194.4 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

-82%

Potential reduce by 66.9 kB

  • Original 81.4 kB
  • After minification 71.8 kB
  • After compression 14.5 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. Helion.cz needs all CSS files to be minified and compressed as it can save up to 66.9 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (49%)

Requests Now

39

After Optimization

20

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Helion. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

helion.cz

helion.cz

420 ms

helion.cz

helion.cz

611 ms

js

js

56 ms

style.min.css

style.min.css

246 ms

DependencyHandler.axd

DependencyHandler.axd

459 ms

loader.js

loader.js

602 ms

DependencyHandler.axd

DependencyHandler.axd

442 ms

js

js

72 ms

css

css

32 ms

richtext.css

richtext.css

198 ms

fullwidth.css

fullwidth.css

315 ms

settings.css

settings.css

426 ms

main.css

main.css

328 ms

retargeting.js

retargeting.js

594 ms

loader.js

loader.js

415 ms

jquery.mousewheel.min.js

jquery.mousewheel.min.js

27 ms

virtual-key.js

virtual-key.js

97 ms

smap-jak.js

smap-jak.js

479 ms

config.js

config.js

382 ms

cs.js

cs.js

287 ms

smap-jak.css

smap-jak.css

287 ms

analytics.js

analytics.js

130 ms

iconPhone.png

iconPhone.png

187 ms

logo.png

logo.png

185 ms

searchButton.png

searchButton.png

185 ms

imageGen.ashx

imageGen.ashx

1454 ms

imageGen.ashx

imageGen.ashx

484 ms

imageGen.ashx

imageGen.ashx

694 ms

iconGraph.png

iconGraph.png

298 ms

iconQuestion.png

iconQuestion.png

300 ms

iconChat.png

iconChat.png

299 ms

iconNewsletter.png

iconNewsletter.png

413 ms

aboutBg.png

aboutBg.png

422 ms

logoOrangehouse.png

logoOrangehouse.png

414 ms

loader.gif

loader.gif

564 ms

timer.png

timer.png

553 ms

raleway-regular-webfont.woff

raleway-regular-webfont.woff

528 ms

raleway-heavy-webfont.woff

raleway-heavy-webfont.woff

575 ms

raleway-thin-webfont.woff

raleway-thin-webfont.woff

737 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4uaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4uaVQ.woff

27 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4uaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4uaVQ.woff

35 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4uaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4uaVQ.woff

41 ms

raleway-bold-webfont.woff

raleway-bold-webfont.woff

699 ms

collect

collect

15 ms

collect

collect

37 ms

js

js

59 ms

print.css

print.css

110 ms

arrow_left.png

arrow_left.png

117 ms

arrow_right.png

arrow_right.png

115 ms

Accessibility Review

helion.cz accessibility score

71

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

High

Form elements do not have associated labels

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.

Best Practices

helion.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

helion.cz SEO score

100

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

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Helion.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 Helion.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

helion.cz

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