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name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

29/100

10%

LCP (Largest Contentful Paint)

Value4.5 s

36/100

25%

SI (Speed Index)

Value11.3 s

5/100

10%

TBT (Total Blocking Time)

Value6,580 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.027

100/100

15%

TTI (Time to Interactive)

Value20.9 s

2/100

10%

tui.com

291 ms

www.tui.com

663 ms

main.min.js

226 ms

start-being-cute.js

8177 ms

prod.js

9484 ms

Our browser made a total of 64 requests to load all elements on the main page. We found that 39% of them (25 requests) were addressed to the original Tui.com, 58% (37 requests) were made to Cloud.tui.com and 2% (1 request) were made to Tags.tiqcdn.com. The less responsive or slowest element that took the longest time to load (20.1 sec) relates to the external source Cloud.tui.com.

Content Size

1.9 MB

After Optimization

784.1 kB

In fact, the total size of Tui.com main page is 1.9 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 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 442.2 kB

Original 551.4 kB
After minification 535.6 kB
After compression 109.2 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. 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 442.2 kB or 80% of the original size.

Image Optimization

-1%

Potential reduce by 228 B

Original 40.6 kB
After minification 40.4 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. TUI images are well optimized though.

JavaScript Optimization

-50%

Potential reduce by 598.9 kB

Original 1.2 MB
After minification 1.2 MB
After compression 610.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 598.9 kB or 50% of the original size.

CSS Optimization

-76%

Potential reduce by 77.1 kB

Original 100.9 kB
After minification 96.4 kB
After compression 23.8 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. Tui.com needs all CSS files to be minified and compressed as it can save up to 77.1 kB or 76% of the original size.

Requests Now

After Optimization

The browser has sent 42 CSS, Javascripts, AJAX and image requests in order to completely render the main page of TUI. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

button, link, and menuitem elements do not have accessible names.

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

Image elements do not have [alt] attributes

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 the experience of reading tabular or list data using assistive technology, like a screen reader.

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

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

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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

DE
Language Claimed

DE
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Tui.com can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it matches the claimed language. Our system also found out that Tui.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

tui.com

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

Urlaub buchen » sicher und günstig reisen | TUI

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

tui.com

www.tui.com

main.min.js

start-being-cute.js

prod.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

tui.com

www.tui.com

main.min.js

start-being-cute.js

prod.js

index.js

main.async.min.js

campaignConfigurationData

commons.min.js

homesearch.min.js

globalCss.min.css

printCss.min.css

last-minute-urlaub-2025-selfie-am-strand-mit-text-cta.jpg

tuitypelight-regular.woff

tuitypelight-bold.woff

tuiicons.woff

Ambit-Bold.woff

Ambit-SemiBold.woff

utag.js

login.js

travelexplorer.js

countdown.js

search-history.js

www.tui.com

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flag_de.png

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