Tools & Wizards About Us
oscom.cz screenshot

Report Summary

  • 25

    Performance

    Renders faster than
    44% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 95

    SEO

    Google-friendlier than
    90% of websites

oscom.cz

Doktor Kladivo | Specialista na ruční a elektrické nářadí

Page Load Speed

8.3 sec in total

First Response

438 ms

Resources Loaded

7.3 sec

Page Rendered

588 ms

oscom.cz screenshot

About Website

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

Internetový obchod se širokou nabídkou ručního a elektrického nářadí. Nářadí nás baví. Jsme profesionálové a poradíme vám s výběrem nářadí pro vaši dílnu.

Visit oscom.cz

Key Findings

We analyzed Oscom.cz page load time and found that the first response time was 438 ms and then it took 7.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

oscom.cz performance score

25

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value17.4 s

0/100

25%

SI (Speed Index)

Value10.1 s

9/100

10%

TBT (Total Blocking Time)

Value1,150 ms

22/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value14.7 s

8/100

10%

Network Requests Diagram

oscom.cz

438 ms

www.doktorkladivo.cz

2728 ms

autocomplete.css

20 ms

cookieconsent.css

209 ms

lazyload.min.js

240 ms

Our browser made a total of 179 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Oscom.cz, 65% (117 requests) were made to Admin.doktorkladivo.cz and 19% (34 requests) were made to Doktorkladivo.cz. The less responsive or slowest element that took the longest time to load (2.7 sec) relates to the external source Doktorkladivo.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 590.6 kB (17%)

Content Size

3.4 MB

After Optimization

2.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Oscom.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. 70% of websites need less resources to load. Images take 2.6 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 223.6 kB

  • Original 268.2 kB
  • After minification 246.0 kB
  • After compression 44.6 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 223.6 kB or 83% of the original size.

Image Optimization

-6%

Potential reduce by 151.6 kB

  • Original 2.6 MB
  • After minification 2.4 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. Oscom images are well optimized though.

JavaScript Optimization

-37%

Potential reduce by 116.9 kB

  • Original 314.9 kB
  • After minification 309.2 kB
  • After compression 197.9 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 116.9 kB or 37% of the original size.

CSS Optimization

-46%

Potential reduce by 98.4 kB

  • Original 213.5 kB
  • After minification 213.5 kB
  • After compression 115.0 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. Oscom.cz needs all CSS files to be minified and compressed as it can save up to 98.4 kB or 46% of the original size.

Requests Breakdown

Number of requests can be reduced by 45 (27%)

Requests Now

169

After Optimization

124

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 169 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Oscom. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

oscom.cz

oscom.cz

438 ms

www.doktorkladivo.cz

www.doktorkladivo.cz

2728 ms

autocomplete.css

autocomplete.css

20 ms

cookieconsent.css

cookieconsent.css

209 ms

lazyload.min.js

lazyload.min.js

240 ms

strict.js

strict.js

260 ms

polyfill.min.js

polyfill.min.js

34 ms

polyfill.min.js

polyfill.min.js

228 ms

polyfill

polyfill

42 ms

jquery.min.js

jquery.min.js

565 ms

jquery-ui.min.js

jquery-ui.min.js

377 ms

shop-notification.js

shop-notification.js

377 ms

netteForms.js

netteForms.js

383 ms

nette.ajax.js

nette.ajax.js

383 ms

app.ext.js

app.ext.js

383 ms

app.main.js

app.main.js

555 ms

owl.carousel.min.js

owl.carousel.min.js

594 ms

scripts.js

scripts.js

555 ms

modal-login.js

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555 ms

jsloader-c50ee87723e4.js

jsloader-c50ee87723e4.js

598 ms

cookieconsent.js

cookieconsent.js

582 ms

autocomplete.js

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13 ms

polyfill

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14 ms

index.js

index.js

16 ms

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gtm.js

181 ms

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fonts.css

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615 ms

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986 ms

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1541 ms

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48 ms

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714 ms

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836 ms

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Accessibility Review

oscom.cz accessibility score

85

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-hidden="true"] elements contain focusable descendents

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

oscom.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

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

oscom.cz SEO score

95

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Oscom.cz can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Czech. Our system also found out that Oscom.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

oscom.cz

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