Tools & Wizards About Us
otos.cz screenshot

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 34% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

otos.cz

Motobaterie, Autobaterie, Trakční baterie a záložní baterie | Otos.cz

Page Load Speed

5.2 sec in total

First Response

717 ms

Resources Loaded

4.3 sec

Page Rendered

152 ms

otos.cz screenshot

About Website

Visit otos.cz now to see the best up-to-date Otos content for Czech Republic and also check out these interesting facts you probably never knew about otos.cz

Motobaterie, autobaterie, nabíječka autobaterií, trakční baterie, záložní baterie, autobaterie Varta, autobaterie Banner. Prodej moto baterií a autobaterií od prověřených značek za nízké ceny. Široká ...

Visit otos.cz

Key Findings

We analyzed Otos.cz page load time and found that the first response time was 717 ms and then it took 4.5 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

otos.cz performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

52/100

10%

LCP (Largest Contentful Paint)

Value3.8 s

55/100

25%

SI (Speed Index)

Value5.6 s

53/100

10%

TBT (Total Blocking Time)

Value480 ms

60/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value6.7 s

57/100

10%

Network Requests Diagram

otos.cz

717 ms

www.otos.cz

1369 ms

style.css

217 ms

support.js

188 ms

windows.js

188 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 89% of them (64 requests) were addressed to the original Otos.cz, 3% (2 requests) were made to Google-analytics.com and 1% (1 request) were made to Googleadservices.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Otos.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 102.0 kB (33%)

Content Size

309.2 kB

After Optimization

207.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Otos.cz main page is 309.2 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. 30% of websites need less resources to load. Javascripts take 151.3 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 76.2 kB

  • Original 88.6 kB
  • After minification 86.6 kB
  • After compression 12.4 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 76.2 kB or 86% of the original size.

Image Optimization

-33%

Potential reduce by 22.7 kB

  • Original 68.0 kB
  • After minification 45.3 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, Otos needs image optimization as it can save up to 22.7 kB or 33% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-2%

Potential reduce by 2.9 kB

  • Original 151.3 kB
  • After minification 150.8 kB
  • After compression 148.4 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

-15%

Potential reduce by 199 B

  • Original 1.3 kB
  • After minification 1.3 kB
  • After compression 1.1 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. Otos.cz needs all CSS files to be minified and compressed as it can save up to 199 B or 15% of the original size.

Requests Breakdown

Number of requests can be reduced by 39 (56%)

Requests Now

70

After Optimization

31

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 70 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Otos. 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 as a result speed up the page load time.

Network Requests Diagram

otos.cz

otos.cz

717 ms

www.otos.cz

www.otos.cz

1369 ms

style.css

style.css

217 ms

support.js

support.js

188 ms

windows.js

windows.js

188 ms

functions.js

functions.js

188 ms

jquery.js

jquery.js

301 ms

jquery.cookie.js

jquery.cookie.js

197 ms

jquery.cookies_usage_info.js

jquery.cookies_usage_info.js

280 ms

flash_news.js

flash_news.js

281 ms

conversion.js

conversion.js

83 ms

colorizer.css

colorizer.css

95 ms

hlavicka.gif

hlavicka.gif

468 ms

logo.gif

logo.gif

187 ms

tree_close.gif

tree_close.gif

100 ms

tree_none.gif

tree_none.gif

100 ms

1-1.gif

1-1.gif

95 ms

1-2.gif

1-2.gif

95 ms

1-3.gif

1-3.gif

188 ms

0-5.gif

0-5.gif

189 ms

2-1.gif

2-1.gif

197 ms

2-2.gif

2-2.gif

198 ms

2-3.gif

2-3.gif

280 ms

3-1.gif

3-1.gif

281 ms

3-2.gif

3-2.gif

282 ms

3-3.gif

3-3.gif

295 ms

4-1.gif

4-1.gif

295 ms

4-2.gif

4-2.gif

374 ms

4-3.gif

4-3.gif

374 ms

nabijecka-autobaterii-bosch-c3-6-12v-3-8a-small.jpg

nabijecka-autobaterii-bosch-c3-6-12v-3-8a-small.jpg

374 ms

varta-blue-dynamic-12v-44ah-440a-544-402-044-small.jpg

varta-blue-dynamic-12v-44ah-440a-544-402-044-small.jpg

392 ms

nabijecka-ctek-mxs-5-0-12v-5a-small.jpg

nabijecka-ctek-mxs-5-0-12v-5a-small.jpg

393 ms

varta-silver-dynamic-12v-77ah-780a-577-400-e44-small.jpg

varta-silver-dynamic-12v-77ah-780a-577-400-e44-small.jpg

467 ms

varta-professional-starter-12v-74ah-680a-930-074-lfs74-small.jpg

varta-professional-starter-12v-74ah-680a-930-074-lfs74-small.jpg

468 ms

motobaterie-varta-ytx9-bs-508012-12v-8ah-135a-small.jpg

motobaterie-varta-ytx9-bs-508012-12v-8ah-135a-small.jpg

468 ms

motobaterie-varta-ytx12-bs-510012-12v-10ah-150a-small.jpg

motobaterie-varta-ytx12-bs-510012-12v-10ah-150a-small.jpg

491 ms

autobaterie-banner-starting-bull-12v-72ah-640a-57212-small.jpg

autobaterie-banner-starting-bull-12v-72ah-640a-57212-small.jpg

491 ms

autobaterie-banner-power-bull-professional-12v-63ah-620a-p6340-small.jpg

autobaterie-banner-power-bull-professional-12v-63ah-620a-p6340-small.jpg

562 ms

autobaterie-banner-power-bull-professional-12v-77ah-p7740-small.jpg

autobaterie-banner-power-bull-professional-12v-77ah-p7740-small.jpg

563 ms

captcha.php

captcha.php

565 ms

19.jpg

19.jpg

563 ms

motobatt-mplx7u-hp-lithium-mini.jpg

motobatt-mplx7u-hp-lithium-mini.jpg

589 ms

motobatt-mplxhk-p-lithium-mini.jpg

motobatt-mplxhk-p-lithium-mini.jpg

589 ms

noco-gbc017-ochranne-pouzdro-gb50-mini.jpg

noco-gbc017-ochranne-pouzdro-gb50-mini.jpg

663 ms

nabijec-volt-lcd-12v-10a-24v-5a-mini.jpg

nabijec-volt-lcd-12v-10a-24v-5a-mini.jpg

656 ms

vipow-lp75-12-12v-75ah-mini.jpg

vipow-lp75-12-12v-75ah-mini.jpg

663 ms

rss.gif

rss.gif

664 ms

navbar.png

navbar.png

678 ms

divider.gif

divider.gif

596 ms

panel_h3.png

panel_h3.png

657 ms

button.png

button.png

662 ms

orange-arrow.png

orange-arrow.png

662 ms

0-4.gif

0-4.gif

574 ms

bg_page.png

bg_page.png

600 ms

button-basket.png

button-basket.png

601 ms

16.gif

16.gif

650 ms

bg_products_cleaner.png

bg_products_cleaner.png

657 ms

23.gif

23.gif

575 ms

ico-basket.black.gif

ico-basket.black.gif

573 ms

ico-user.black.gif

ico-user.black.gif

605 ms

ico-email.png

ico-email.png

593 ms

ico-mobil.png

ico-mobil.png

646 ms

refresh.gif

refresh.gif

574 ms

retargeting.js

retargeting.js

702 ms

print.css

print.css

96 ms

counter.php

counter.php

371 ms

48 ms

analytics.js

analytics.js

20 ms

conv.js

conv.js

802 ms

collect

collect

15 ms

30 ms

js

js

64 ms

Accessibility Review

otos.cz accessibility score

69

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

Best Practices

otos.cz best practices score

67

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

otos.cz SEO score

62

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

    EN

  • Encoding

    UTF-8

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

otos.cz

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