Tools & Wizards About Us
zelena-optika.cz screenshot

Report Summary

  • 79

    Performance

    Renders faster than
    86% of other websites

  • 67

    Accessibility

    Visual factors better than
    that of 32% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

zelena-optika.cz

Oční optika | Zelená - OPTIKA, s.r.o.

Page Load Speed

3.1 sec in total

First Response

436 ms

Resources Loaded

2.5 sec

Page Rendered

200 ms

zelena-optika.cz screenshot

About Website

Welcome to zelena-optika.cz homepage info - get ready to check Zelena Optika best content right away, or after learning these important things about zelena-optika.cz

Visit zelena-optika.cz

Key Findings

We analyzed Zelena-optika.cz page load time and found that the first response time was 436 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

zelena-optika.cz performance score

79

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

79/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

27/100

25%

SI (Speed Index)

Value3.2 s

92/100

10%

TBT (Total Blocking Time)

Value60 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value2.7 s

97/100

10%

Network Requests Diagram

zelena-optika.cz

436 ms

www.zelena-optika.cz

483 ms

stylesheet.php

137 ms

highslide.js

234 ms

favicon.ico

27 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 71% of them (20 requests) were addressed to the original Zelena-optika.cz, 7% (2 requests) were made to Google-analytics.com and 4% (1 request) were made to Toolbarqueries.google.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Zelena-optika.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 68.0 kB (6%)

Content Size

1.1 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Zelena-optika.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. 25% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 18.1 kB

  • Original 22.1 kB
  • After minification 21.8 kB
  • After compression 3.9 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. 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 18.1 kB or 82% of the original size.

Image Optimization

-2%

Potential reduce by 15.7 kB

  • Original 1.0 MB
  • After minification 990.7 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. Zelena Optika images are well optimized though.

JavaScript Optimization

-57%

Potential reduce by 34.2 kB

  • Original 60.4 kB
  • After minification 49.1 kB
  • After compression 26.3 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 34.2 kB or 57% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

24

After Optimization

24

  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zelena Optika. According to our analytics all requests are already optimized.

Network Requests Diagram

zelena-optika.cz

zelena-optika.cz

436 ms

www.zelena-optika.cz

www.zelena-optika.cz

483 ms

stylesheet.php

stylesheet.php

137 ms

highslide.js

highslide.js

234 ms

favicon.ico

favicon.ico

27 ms

favicon.ico

favicon.ico

25 ms

favicon.ico

favicon.ico

28 ms

favicon.ico

favicon.ico

23 ms

favicon.ico

favicon.ico

141 ms

bg_topic.jpg

bg_topic.jpg

227 ms

ico1.gif

ico1.gif

117 ms

Varilux%201+1.gif

Varilux%201+1.gif

579 ms

transitions.jpg

transitions.jpg

1179 ms

612_Alcon_Dailies_banner_970x310_Rectangle_CZ_03.jpg

612_Alcon_Dailies_banner_970x310_Rectangle_CZ_03.jpg

859 ms

Hannah.jpg

Hannah.jpg

609 ms

loga%20karet.JPG

loga%20karet.JPG

403 ms

Senior%20pas.jpg

Senior%20pas.jpg

686 ms

rodinn%C3%A9%20pasy%20velky.jpg

rodinn%C3%A9%20pasy%20velky.jpg

753 ms

loga%20sodexo.JPG

loga%20sodexo.JPG

702 ms

catalog_03.png

catalog_03.png

733 ms

catalog_02.png

catalog_02.png

816 ms

catalog_01.png

catalog_01.png

812 ms

catalog_button.png

catalog_button.png

847 ms

ga.js

ga.js

6 ms

__utm.gif

__utm.gif

13 ms

favicon.ico

favicon.ico

164 ms

rounded-white.png

rounded-white.png

116 ms

zoomout.cur

zoomout.cur

117 ms

Accessibility Review

zelena-optika.cz accessibility score

67

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Links do not have a discernible name

Best Practices

zelena-optika.cz best practices score

67

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

High

Browser errors were logged to the console

SEO Factors

zelena-optika.cz SEO score

54

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

    UTF-8

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

zelena-optika.cz

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