Access jazzopen.com. jazzopen stuttgart | Das Festival für Jazz & Beyond

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

55/100

10%

LCP (Largest Contentful Paint)

Value8.9 s

2/100

25%

SI (Speed Index)

Value12.1 s

4/100

10%

TBT (Total Blocking Time)

Value1,090 ms

24/100

30%

CLS (Cumulative Layout Shift)

Value1.22

1/100

15%

TTI (Time to Interactive)

Value7.8 s

45/100

10%

jazzopen.com

7192 ms

stylesheet_7709e71ae1.css

308 ms

modernizr-2.6.2.min.js

2054 ms

javascript_fd83b4a34e.js

313 ms

main.css

313 ms

Our browser made a total of 105 requests to load all elements on the main page. We found that 98% of them (103 requests) were addressed to the original Jazzopen.com, 2% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (7.2 sec) belongs to the original domain Jazzopen.com.

Content Size

3.7 MB

After Optimization

3.3 MB

In fact, the total size of Jazzopen.com main page is 3.7 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. Images take 3.4 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 52.9 kB

Original 67.1 kB
After minification 59.9 kB
After compression 14.2 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 7.2 kB, which is 11% 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 52.9 kB or 79% of the original size.

Image Optimization

-5%

Potential reduce by 162.8 kB

Original 3.4 MB
After minification 3.2 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. Jazz Open images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 93.2 kB

Original 159.3 kB
After minification 153.5 kB
After compression 66.1 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 93.2 kB or 58% of the original size.

CSS Optimization

-85%

Potential reduce by 58.8 kB

Original 69.5 kB
After minification 54.2 kB
After compression 10.7 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. Jazzopen.com needs all CSS files to be minified and compressed as it can save up to 58.8 kB or 85% of the original size.

Requests Now

103

After Optimization

The browser has sent 103 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jazz Open. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 7 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

[role] values are not valid

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 the interpretation of your content by users in different locales.

High

<html> element does not have a valid value for its [lang] attribute.

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

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

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 Jazzopen.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 Jazzopen.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

jazzopen.com

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

jazzopen stuttgart | Das Festival für Jazz & Beyond

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

jazzopen.com

stylesheet_7709e71ae1.css

modernizr-2.6.2.min.js

javascript_fd83b4a34e.js

main.css

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

jazzopen.com

stylesheet_7709e71ae1.css

modernizr-2.6.2.min.js

javascript_fd83b4a34e.js

main.css

modernizr-2.6.2.min.js

jquery-1.4.3.min.js

jquery.flexslider-min.js

jquery.fancybox-1.3.4.pack.js

fancybox.js

flexslider.js

programm.js

normalize.min.css

font.css

styles.css

flexslider.css

jquery.fancybox-1.3.4.css

analytics.js

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