Tools & Wizards About Us
zfl-berlin.org screenshot

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

zfl-berlin.org

Leibniz Center for Literary and Cultural Research - ZfL Berlin

Page Load Speed

4 sec in total

First Response

279 ms

Resources Loaded

3.4 sec

Page Rendered

278 ms

zfl-berlin.org screenshot

About Website

Visit zfl-berlin.org now to see the best up-to-date ZfL Berlin content for Germany and also check out these interesting facts you probably never knew about zfl-berlin.org

The ZfL is a humanities institute for literary research in interdisciplinary contexts that draws from a cultural studies framework.

Visit zfl-berlin.org

Key Findings

We analyzed Zfl-berlin.org page load time and found that the first response time was 279 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

zfl-berlin.org performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value4.9 s

29/100

25%

SI (Speed Index)

Value4.4 s

73/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.42

23/100

15%

TTI (Time to Interactive)

Value4.1 s

86/100

10%

Network Requests Diagram

zfl-berlin.org

279 ms

zfl-berlin.org

458 ms

www.zfl-berlin.org

527 ms

zfl-english.html

401 ms

theme-minimal.5ea07f6a.css

112 ms

Our browser made a total of 54 requests to load all elements on the main page. We found that all of those requests were addressed to Zfl-berlin.org and no external sources were called. The less responsive or slowest element that took the longest time to load (977 ms) belongs to the original domain Zfl-berlin.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 58.8 kB (2%)

Content Size

2.8 MB

After Optimization

2.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zfl-berlin.org main page is 2.8 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. 35% of websites need less resources to load. Images take 2.7 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 37.0 kB

  • Original 46.8 kB
  • After minification 42.3 kB
  • After compression 9.8 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 37.0 kB or 79% of the original size.

Image Optimization

-0%

Potential reduce by 7.8 kB

  • Original 2.7 MB
  • After minification 2.7 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. ZfL Berlin images are well optimized though.

JavaScript Optimization

-17%

Potential reduce by 13.9 kB

  • Original 84.0 kB
  • After minification 83.1 kB
  • After compression 70.1 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 13.9 kB or 17% of the original size.

CSS Optimization

-1%

Potential reduce by 153 B

  • Original 19.7 kB
  • After minification 19.7 kB
  • After compression 19.5 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. Zfl-berlin.org has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 28 (61%)

Requests Now

46

After Optimization

18

  • Images
  • JavaScript
  • CSS

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ZfL Berlin. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zfl-berlin.org

zfl-berlin.org

279 ms

zfl-berlin.org

zfl-berlin.org

458 ms

www.zfl-berlin.org

www.zfl-berlin.org

527 ms

zfl-english.html

zfl-english.html

401 ms

theme-minimal.5ea07f6a.css

theme-minimal.5ea07f6a.css

112 ms

colorbox.min.css

colorbox.min.css

224 ms

app.css

app.css

444 ms

custom.css

custom.css

332 ms

jquery.min.js

jquery.min.js

450 ms

what-input.js

what-input.js

333 ms

foundation.core.js

foundation.core.js

333 ms

foundation.util.box.js

foundation.util.box.js

334 ms

foundation.util.keyboard.js

foundation.util.keyboard.js

442 ms

foundation.util.mediaQuery.js

foundation.util.mediaQuery.js

459 ms

foundation.util.motion.js

foundation.util.motion.js

459 ms

foundation.util.nest.js

foundation.util.nest.js

459 ms

foundation.util.timerAndImageLoader.js

foundation.util.timerAndImageLoader.js

553 ms

foundation.util.touch.js

foundation.util.touch.js

553 ms

foundation.util.triggers.js

foundation.util.triggers.js

554 ms

foundation.equalizer.js

foundation.equalizer.js

557 ms

slick.min.js

slick.min.js

558 ms

readmore.min.js

readmore.min.js

556 ms

app.js

app.js

663 ms

status.js

status.js

725 ms

consent-manager.b19ced65.js

consent-manager.b19ced65.js

664 ms

en

en

763 ms

jquery-ui.min.js

jquery-ui.min.js

664 ms

colorbox.min.js

colorbox.min.js

665 ms

zfl_logo_rot.svg

zfl_logo_rot.svg

209 ms

zfl_logo_schriftzug_rot.svg

zfl_logo_schriftzug_rot.svg

207 ms

icon_suche.svg

icon_suche.svg

210 ms

icon_sprache_de.svg

icon_sprache_de.svg

211 ms

24_Wasserzeichen.jpg

24_Wasserzeichen.jpg

668 ms

30_Wasserzeichen.jpg

30_Wasserzeichen.jpg

558 ms

13_Wasserzeichen.jpg

13_Wasserzeichen.jpg

665 ms

20_Wasserzeichen.jpg

20_Wasserzeichen.jpg

780 ms

22_Wasserzeichen.jpg

22_Wasserzeichen.jpg

778 ms

9_Wasserzeichen.jpg

9_Wasserzeichen.jpg

777 ms

27_Wasserzeichen.jpg

27_Wasserzeichen.jpg

671 ms

Leibniz_Logo_EN_negative_500px.png

Leibniz_Logo_EN_negative_500px.png

777 ms

teaser_fischer_experimentierfeld-versepos.jpg

teaser_fischer_experimentierfeld-versepos.jpg

780 ms

Blog_tasten_rot_gold_haufen-5f9b0e68.jpg

Blog_tasten_rot_gold_haufen-5f9b0e68.jpg

781 ms

Blog_tasten_schwarz_gold_haufen-e2160dc5.jpg

Blog_tasten_schwarz_gold_haufen-e2160dc5.jpg

889 ms

2024_trueper_unsterbliche-werte-254a6971.jpg

2024_trueper_unsterbliche-werte-254a6971.jpg

889 ms

Blog_tasten_grau_gold_haufen-7d83212e.jpg

Blog_tasten_grau_gold_haufen-7d83212e.jpg

890 ms

icon_slide_rechts_weiss.svg

icon_slide_rechts_weiss.svg

876 ms

4deeb3d8-6eff-48da-9238-9220bb4a35f0.woff

4deeb3d8-6eff-48da-9238-9220bb4a35f0.woff

884 ms

0b6078b5-b3d8-46ee-a22e-5197ae487290.woff

0b6078b5-b3d8-46ee-a22e-5197ae487290.woff

878 ms

icon_slide_rechts.svg

icon_slide_rechts.svg

977 ms

icon_pfeil.svg

icon_pfeil.svg

970 ms

icon_share_facebook.svg

icon_share_facebook.svg

970 ms

icon_share_twitter.svg

icon_share_twitter.svg

970 ms

e5f914a2-f9f2-46e4-a9c3-ce1936defdd2.woff

e5f914a2-f9f2-46e4-a9c3-ce1936defdd2.woff

928 ms

2d53c500-70cf-4d12-9c8c-abd0efe18145.woff

2d53c500-70cf-4d12-9c8c-abd0efe18145.woff

932 ms

Accessibility Review

zfl-berlin.org accessibility score

88

Accessibility Issues

ARIA

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.

Impact

Issue

High

ARIA input fields do not have accessible names

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

zfl-berlin.org best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

zfl-berlin.org SEO score

83

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

Links do not have descriptive text

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

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

zfl-berlin.org

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