Report Summary

  • 27

    Performance

    Renders faster than
    47% of other websites

  • 58

    Accessibility

    Visual factors better than
    that of 25% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

superlet.cz

Letenky, levné letenky online - last minute letenky

Page Load Speed

7.4 sec in total

First Response

1.1 sec

Resources Loaded

6 sec

Page Rendered

279 ms

superlet.cz screenshot

About Website

Visit superlet.cz now to see the best up-to-date Superlet content and also check out these interesting facts you probably never knew about superlet.cz

Levné letenky, letenky last minute do jakékoliv destinace si můžete objednat online na internetových stránkách.

Visit superlet.cz

Key Findings

We analyzed Superlet.cz page load time and found that the first response time was 1.1 sec and then it took 6.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

superlet.cz performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

5/100

10%

LCP (Largest Contentful Paint)

Value8.5 s

1/100

25%

SI (Speed Index)

Value9.9 s

10/100

10%

TBT (Total Blocking Time)

Value1,000 ms

27/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value11.7 s

18/100

10%

Network Requests Diagram

superlet.cz

1070 ms

www.superlet.cz

602 ms

base.css

348 ms

css

25 ms

jquery.js

698 ms

Our browser made a total of 99 requests to load all elements on the main page. We found that 32% of them (32 requests) were addressed to the original Superlet.cz, 54% (53 requests) were made to Letuska.cz and 4% (4 requests) were made to Mc.yandex.ru. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Superlet.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 976.5 kB (63%)

Content Size

1.5 MB

After Optimization

566.0 kB

In fact, the total size of Superlet.cz main page is 1.5 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. 55% of websites need less resources to load. Javascripts take 880.1 kB which makes up the majority of the site volume.

HTML Optimization

-65%

Potential reduce by 10.2 kB

  • Original 15.8 kB
  • After minification 15.0 kB
  • After compression 5.6 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 10.2 kB or 65% of the original size.

Image Optimization

-18%

Potential reduce by 65.7 kB

  • Original 365.9 kB
  • After minification 300.3 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, Superlet needs image optimization as it can save up to 65.7 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-73%

Potential reduce by 646.8 kB

  • Original 880.1 kB
  • After minification 788.7 kB
  • After compression 233.2 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 646.8 kB or 73% of the original size.

CSS Optimization

-90%

Potential reduce by 253.8 kB

  • Original 280.7 kB
  • After minification 155.7 kB
  • After compression 27.0 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. Superlet.cz needs all CSS files to be minified and compressed as it can save up to 253.8 kB or 90% of the original size.

Requests Breakdown

Number of requests can be reduced by 72 (78%)

Requests Now

92

After Optimization

20

The browser has sent 92 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Superlet. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 33 to 1 for JavaScripts and from 27 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

superlet.cz accessibility score

58

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

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Best Practices

superlet.cz best practices score

58

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

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

superlet.cz SEO score

69

Search Engine Optimization Advices

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

    N/A

  • Encoding

    UTF-8

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

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