Tools & Wizards About Us
david-kolak.com screenshot

Report Summary

  • 55

    Performance

    Renders faster than
    72% of other websites

  • 60

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

david-kolak.com

David Kolak - Osobna web stranica

Page Load Speed

4.1 sec in total

First Response

876 ms

Resources Loaded

3.1 sec

Page Rendered

118 ms

david-kolak.com screenshot

About Website

Visit david-kolak.com now to see the best up-to-date David Kolak content and also check out these interesting facts you probably never knew about david-kolak.com

David Kolak - personal website

Visit david-kolak.com

Key Findings

We analyzed David-kolak.com page load time and found that the first response time was 876 ms and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

david-kolak.com performance score

55

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

35/100

10%

LCP (Largest Contentful Paint)

Value4.6 s

35/100

25%

SI (Speed Index)

Value6.4 s

40/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.915

3/100

15%

TTI (Time to Interactive)

Value4.9 s

78/100

10%

Network Requests Diagram

david-kolak.com

876 ms

david-kolak.com

519 ms

css.css

131 ms

style_main.css

261 ms

style_additional.css

345 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that all of those requests were addressed to David-kolak.com and no external sources were called. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain David-kolak.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 40.3 kB (9%)

Content Size

451.0 kB

After Optimization

410.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of David-kolak.com main page is 451.0 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. 40% of websites need less resources to load. Javascripts take 237.2 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 9.7 kB

  • Original 11.9 kB
  • After minification 9.1 kB
  • After compression 2.2 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 2.8 kB, which is 23% 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 9.7 kB or 82% of the original size.

Image Optimization

-1%

Potential reduce by 1.4 kB

  • Original 132.5 kB
  • After minification 131.1 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. David Kolak images are well optimized though.

JavaScript Optimization

-5%

Potential reduce by 11.0 kB

  • Original 237.2 kB
  • After minification 237.2 kB
  • After compression 226.2 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

-26%

Potential reduce by 18.2 kB

  • Original 69.4 kB
  • After minification 69.4 kB
  • After compression 51.2 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. David-kolak.com needs all CSS files to be minified and compressed as it can save up to 18.2 kB or 26% of the original size.

Requests Breakdown

Number of requests can be reduced by 31 (91%)

Requests Now

34

After Optimization

3

  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of David Kolak. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 15 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

david-kolak.com

david-kolak.com

876 ms

david-kolak.com

david-kolak.com

519 ms

css.css

css.css

131 ms

style_main.css

style_main.css

261 ms

style_additional.css

style_additional.css

345 ms

bootstrap.css

bootstrap.css

464 ms

font-awesome.min.css

font-awesome.min.css

346 ms

style.css

style.css

350 ms

flexslider.css

flexslider.css

386 ms

nivo-lightbox.css

nivo-lightbox.css

469 ms

default.css

default.css

471 ms

animate.css

animate.css

474 ms

dodatni.css

dodatni.css

510 ms

common.js

common.js

702 ms

map.js

map.js

584 ms

util.js

util.js

853 ms

marker.js

marker.js

596 ms

onion.js

onion.js

754 ms

ViewportInfoService.GetViewportInfo.js

ViewportInfoService.GetViewportInfo.js

710 ms

stats.js

stats.js

715 ms

controls.js

controls.js

827 ms

vt.js

vt.js

827 ms

AuthenticationService.Authenticate.js

AuthenticationService.Authenticate.js

838 ms

QuotaService.RecordEvent.js

QuotaService.RecordEvent.js

880 ms

font-awesome.css

font-awesome.css

950 ms

font-awesome.min.css

font-awesome.min.css

948 ms

font-awesome-ie7.css

font-awesome-ie7.css

958 ms

font-awesome-ie7.min.css

font-awesome-ie7.min.css

973 ms

jquery.min.js

jquery.min.js

1135 ms

bootstrap.js

bootstrap.js

1079 ms

jquery.flexslider.js

jquery.flexslider.js

1084 ms

jquery.easing.js

jquery.easing.js

1082 ms

jquery.mixitup.min.js

jquery.mixitup.min.js

1095 ms

nivo-lightbox.min.js

nivo-lightbox.min.js

1211 ms

jquery.appear.js

jquery.appear.js

1216 ms

jquery.inview.js

jquery.inview.js

1211 ms

animations.js

animations.js

1217 ms

js

js

1261 ms

main.js

main.js

1220 ms

contact.js

contact.js

1090 ms

david-kolak.jpeg

david-kolak.jpeg

809 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

310 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

302 ms

fontawesome-webfont.ttf

fontawesome-webfont.ttf

121 ms

fontawesome-webfont.svg

fontawesome-webfont.svg

128 ms

Accessibility Review

david-kolak.com accessibility score

60

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Links do not have a discernible name

Best Practices

david-kolak.com 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

david-kolak.com SEO score

85

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Page is blocked from indexing

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

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

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise David-kolak.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that David-kolak.com 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

david-kolak.com

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