Access previo.cz. Previo | Online hotelový rezervační a recepční systém

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

10/100

10%

LCP (Largest Contentful Paint)

Value18.7 s

0/100

25%

SI (Speed Index)

Value12.9 s

2/100

10%

TBT (Total Blocking Time)

Value2,140 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0.62

10/100

15%

TTI (Time to Interactive)

Value16.2 s

5/100

10%

previo.cz

486 ms

www.previo.cz

671 ms

uc.js

38 ms

previo.css

194 ms

api.js

41 ms

Our browser made a total of 81 requests to load all elements on the main page. We found that 65% of them (53 requests) were addressed to the original Previo.cz, 7% (6 requests) were made to Fonts.gstatic.com and 5% (4 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Cdn.foxentry.cz.

Content Size

3.5 MB

After Optimization

3.3 MB

In fact, the total size of Previo.cz main page is 3.5 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 2.8 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 74.8 kB

Original 88.0 kB
After minification 66.6 kB
After compression 13.2 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 21.4 kB, which is 24% 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 74.8 kB or 85% of the original size.

Image Optimization

-0%

Potential reduce by 12.9 kB

Original 2.8 MB
After minification 2.8 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. Previo images are well optimized though.

JavaScript Optimization

-4%

Potential reduce by 18.1 kB

Original 468.8 kB
After minification 468.8 kB
After compression 450.7 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

-0%

Potential reduce by 0 B

Original 61.2 kB
After minification 61.2 kB
After compression 61.2 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. Previo.cz has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 72 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Previo. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 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

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

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

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

Page has valid source maps

Search Engine Optimization Advices

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

High

Links are not crawlable

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

High

Tap targets are not sized appropriately

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 Previo.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 Previo.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

previo.cz

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Previo | Online hotelový rezervační a recepční systém

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

previo.cz

www.previo.cz

uc.js

previo.css

api.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

previo.cz

www.previo.cz

uc.js

previo.css

api.js

rc.js

conversion.js

jquery-1.11.1.min.js

bootstrap.min.js

idangerous.swiper.js

js.cookie.min.js

base.js

homepage.js

countUp.min.js

owl.carousel.min.js

css

css2

recaptcha__en.js

gtm.js

fbevents.js

js

js

destination

bat.js

recorder.js

goggd8so55

logo-previo-white.svg

logo-previo-@2x.png

en.gif

laptop-mobile-PMS.png

alfred-majordomus.png

alfred-majordomus@2x.png

scrolldown-arrow.gif

laptop-rplus-desktop-mobile.png

laptop-previo-desktop-mobile.png

img-portaly-loga.png

5-cs.png

alfred-desktop-mobile.png

laptop-mplus-desktop-mobile.png

headset-solid.svg

logo-pytloun.png

Pytloun.jpg

logo-salvator.png