Access koelner-kultur.de. Köln Kultur in Köln, Köln Museum, Köln Theater, Veranstaltungen in Köln mit Aufführungen, Köln Ausst...

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

6/100

10%

LCP (Largest Contentful Paint)

Value9.0 s

1/100

25%

SI (Speed Index)

Value9.3 s

12/100

10%

TBT (Total Blocking Time)

Value5,980 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.079

94/100

15%

TTI (Time to Interactive)

Value20.9 s

2/100

10%

koelner-kultur.de

296 ms

www.koelner-kultur.de

767 ms

lib.css

642 ms

styles.css

600 ms

lib.js

1172 ms

Our browser made a total of 59 requests to load all elements on the main page. We found that 7% of them (4 requests) were addressed to the original Koelner-kultur.de, 93% (55 requests) were made to Culturall.de. The less responsive or slowest element that took the longest time to load (2.4 sec) relates to the external source Culturall.de.

Content Size

1.8 MB

After Optimization

821.2 kB

In fact, the total size of Koelner-kultur.de main page is 1.8 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. 70% of websites need less resources to load. HTML takes 665.5 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 595.3 kB

Original 665.5 kB
After minification 618.4 kB
After compression 70.2 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 595.3 kB or 89% of the original size.

Image Optimization

-1%

Potential reduce by 3.6 kB

Original 621.1 kB
After minification 617.5 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. Koelner Kultur images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 269.1 kB

Original 384.0 kB
After minification 384.0 kB
After compression 114.8 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 269.1 kB or 70% of the original size.

CSS Optimization

-79%

Potential reduce by 70.6 kB

Original 89.2 kB
After minification 89.2 kB
After compression 18.6 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. Koelner-kultur.de needs all CSS files to be minified and compressed as it can save up to 70.6 kB or 79% of the original size.

Requests Now

After Optimization

The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Koelner Kultur. According to our analytics all requests are already optimized.

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

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

High

robots.txt is not valid

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

N/A
Language Claimed

DE
Encoding

ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Koelner-kultur.de can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is German. Our system also found out that Koelner-kultur.de main page’s claimed encoding is iso-8859-1. 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

koelner-kultur.de

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

Köln Kultur in Köln, Köln Museum, Köln Theater, Veranstaltungen in Köln mit Aufführungen, Köln Ausstellungen, Köln Konzerte, Köln Festival, Köln Ereig...

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

koelner-kultur.de

www.koelner-kultur.de

lib.css

styles.css

lib.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

koelner-kultur.de

www.koelner-kultur.de

lib.css

styles.css

lib.js

scripts.js

get_kategorien.php

culturall.jpg

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