Tools & Wizards About Us
fiz-karlsruhe.de screenshot

Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

fiz-karlsruhe.de

Startseite | FIZ Karlsruhe

Page Load Speed

5.1 sec in total

First Response

1.5 sec

Resources Loaded

3.5 sec

Page Rendered

143 ms

fiz-karlsruhe.de screenshot

About Website

Welcome to fiz-karlsruhe.de homepage info - get ready to check FIZ Karlsruhe best content for Germany right away, or after learning these important things about fiz-karlsruhe.de

FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur ist eine der großen Informationsinfrastruktureinrichtung in Deutschland

Visit fiz-karlsruhe.de

Key Findings

We analyzed Fiz-karlsruhe.de page load time and found that the first response time was 1.5 sec and then it took 3.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

fiz-karlsruhe.de performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value7.5 s

4/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value610 ms

49/100

30%

CLS (Cumulative Layout Shift)

Value0.055

98/100

15%

TTI (Time to Interactive)

Value6.4 s

59/100

10%

Network Requests Diagram

www.fiz-karlsruhe.de

1499 ms

matomo.js

680 ms

css_JzC9Cjh1PCKTQYmN5GdNcBCCqbeyFoytwUG6EwqB1lU.css

334 ms

css_TMMC46HvJ3qJMbRXjZM5ihtjsH--DwuqNhwPXjNIau8.css

989 ms

logo-fiz-karlsruhe-de-claim.svg

449 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 92% of them (22 requests) were addressed to the original Fiz-karlsruhe.de, 8% (2 requests) were made to Partners.fiz-karlsruhe.de. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Fiz-karlsruhe.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 360.9 kB (39%)

Content Size

937.2 kB

After Optimization

576.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Fiz-karlsruhe.de main page is 937.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Javascripts take 300.7 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 110.5 kB

  • Original 129.4 kB
  • After minification 118.7 kB
  • After compression 19.0 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 110.5 kB or 85% of the original size.

Image Optimization

-100%

Potential reduce by 250.2 kB

  • Original 250.9 kB
  • After minification 683 B

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, FIZ Karlsruhe needs image optimization as it can save up to 250.2 kB or 100% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 22 B

  • Original 300.7 kB
  • After minification 300.7 kB
  • After compression 300.7 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 186 B

  • Original 256.2 kB
  • After minification 256.2 kB
  • After compression 256.0 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. Fiz-karlsruhe.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 9 (41%)

Requests Now

22

After Optimization

13

  • Images
  • JavaScript
  • CSS

The browser has sent 22 CSS, Javascripts, AJAX and image requests in order to completely render the main page of FIZ Karlsruhe. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

www.fiz-karlsruhe.de

www.fiz-karlsruhe.de

1499 ms

matomo.js

matomo.js

680 ms

css_JzC9Cjh1PCKTQYmN5GdNcBCCqbeyFoytwUG6EwqB1lU.css

css_JzC9Cjh1PCKTQYmN5GdNcBCCqbeyFoytwUG6EwqB1lU.css

334 ms

css_TMMC46HvJ3qJMbRXjZM5ihtjsH--DwuqNhwPXjNIau8.css

css_TMMC46HvJ3qJMbRXjZM5ihtjsH--DwuqNhwPXjNIau8.css

989 ms

logo-fiz-karlsruhe-de-claim.svg

logo-fiz-karlsruhe-de-claim.svg

449 ms

logo-fiz-karlsruhe-without-tagline.svg

logo-fiz-karlsruhe-without-tagline.svg

338 ms

logo-fiz-scroll.svg

logo-fiz-scroll.svg

340 ms

ukraine.png

ukraine.png

112 ms

js_bGr-5fX7ynHtltyCicCB90XJ46NBzmhyTasnFmK76bc.js

js_bGr-5fX7ynHtltyCicCB90XJ46NBzmhyTasnFmK76bc.js

895 ms

matomo.php

matomo.php

206 ms

icon-sign-language.svg

icon-sign-language.svg

112 ms

icon-leichte-sprache.svg

icon-leichte-sprache.svg

115 ms

icon-contrast.svg

icon-contrast.svg

112 ms

icon-search.svg

icon-search.svg

113 ms

background-header-start.png

background-header-start.png

673 ms

icon-slider-left.svg

icon-slider-left.svg

115 ms

icon-pause.svg

icon-pause.svg

223 ms

icon-slider-right.svg

icon-slider-right.svg

221 ms

youtube-icon.svg

youtube-icon.svg

221 ms

x-icon-white.svg

x-icon-white.svg

225 ms

mastodon-icon-white.svg

mastodon-icon-white.svg

229 ms

logo-leibniz.svg

logo-leibniz.svg

330 ms

MetaOT-Book.woff

MetaOT-Book.woff

298 ms

css_uXYFzcoMqhmN-inO-_l5k42ng1AjZAHNZFXrK4MMRYU.css

css_uXYFzcoMqhmN-inO-_l5k42ng1AjZAHNZFXrK4MMRYU.css

113 ms

Accessibility Review

fiz-karlsruhe.de accessibility score

95

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

Links do not have a discernible name

Best Practices

fiz-karlsruhe.de best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

fiz-karlsruhe.de SEO score

91

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Mobile Friendly

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/).

Impact

Issue

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 Fiz-karlsruhe.de 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 Fiz-karlsruhe.de 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

fiz-karlsruhe.de

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