Access bookinghotel.cz.

Report Summary

name

value

score

weighting

FCP (First Contentful Paint)

Value9.2 s

0/100

10%

LCP (Largest Contentful Paint)

Value9.2 s

1/100

25%

SI (Speed Index)

Value21.3 s

0/100

10%

TBT (Total Blocking Time)

Value3,340 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.025

100/100

15%

TTI (Time to Interactive)

Value30.9 s

0/100

10%

bookinghotel.cz

353 ms

www.bookinghotel.cz

696 ms

style.css

228 ms

948 ms

brand

16 ms

Our browser made a total of 36 requests to load all elements on the main page. We found that 19% of them (7 requests) were addressed to the original Bookinghotel.cz, 25% (9 requests) were made to Dsc.invia.cz and 17% (6 requests) were made to Ssc-affil.invia.cz. The less responsive or slowest element that took the longest time to load (948 ms) relates to the external source Affil.invia.cz.

Content Size

486.3 kB

After Optimization

395.3 kB

In fact, the total size of Bookinghotel.cz main page is 486.3 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. 25% of websites need less resources to load. Images take 349.2 kB which makes up the majority of the site volume.

HTML Optimization

-57%

Potential reduce by 8.8 kB

Original 15.5 kB
After minification 14.9 kB
After compression 6.7 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. 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 8.8 kB or 57% of the original size.

Image Optimization

-4%

Potential reduce by 12.3 kB

Original 349.2 kB
After minification 336.9 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. Bookinghotel images are well optimized though.

JavaScript Optimization

-57%

Potential reduce by 67.2 kB

Original 118.3 kB
After minification 109.0 kB
After compression 51.1 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 67.2 kB or 57% of the original size.

CSS Optimization

-81%

Potential reduce by 2.6 kB

Original 3.3 kB
After minification 2.5 kB
After compression 630 B

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. Bookinghotel.cz needs all CSS files to be minified and compressed as it can save up to 2.6 kB or 81% of the original size.

Requests Now

After Optimization

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Bookinghotel. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

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.

High

Buttons do not have an accessible name

High

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

High

Some elements have a [tabindex] value greater than 0

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

CS
Language Claimed

N/A
Encoding

WINDOWS-1250

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Bookinghotel.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech 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 Bookinghotel.cz main page’s claimed encoding is windows-1250. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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