Tools & Wizards About Us
leibniz-ipht.de screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 62

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 71

    SEO

    Google-friendlier than
    30% of websites

leibniz-ipht.de

Homepage - Leibniz-Institut für Photonische Technologien e.V.

Page Load Speed

17.2 sec in total

First Response

435 ms

Resources Loaded

16.3 sec

Page Rendered

531 ms

leibniz-ipht.de screenshot

About Website

Welcome to leibniz-ipht.de homepage info - get ready to check Leibniz Ipht best content for Germany right away, or after learning these important things about leibniz-ipht.de

Photonics for Life. We explore photonic and optical technologies: solutions with light to make life safer and healthier.

Visit leibniz-ipht.de

Key Findings

We analyzed Leibniz-ipht.de page load time and found that the first response time was 435 ms and then it took 16.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

leibniz-ipht.de performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

45/100

10%

LCP (Largest Contentful Paint)

Value10.3 s

0/100

25%

SI (Speed Index)

Value10.5 s

7/100

10%

TBT (Total Blocking Time)

Value200 ms

89/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value8.9 s

34/100

10%

Network Requests Diagram

leibniz-ipht.de

435 ms

www.leibniz-ipht.de

334 ms

2597 ms

autoptimize_fc3a521d529d1334704805b7b753387d.css

459 ms

jquery-1.11.1.min.js

445 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that all of those requests were addressed to Leibniz-ipht.de and no external sources were called. The less responsive or slowest element that took the longest time to load (11.2 sec) belongs to the original domain Leibniz-ipht.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 272.2 kB (6%)

Content Size

4.7 MB

After Optimization

4.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Leibniz-ipht.de main page is 4.7 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. 25% of websites need less resources to load. Images take 4.0 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 103.3 kB

  • Original 116.5 kB
  • After minification 76.5 kB
  • After compression 13.3 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 40.1 kB, which is 34% 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 103.3 kB or 89% of the original size.

Image Optimization

-4%

Potential reduce by 168.1 kB

  • Original 4.0 MB
  • After minification 3.8 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. Leibniz Ipht images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 36 B

  • Original 484.6 kB
  • After minification 484.6 kB
  • After compression 484.6 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

-1%

Potential reduce by 846 B

  • Original 141.5 kB
  • After minification 141.5 kB
  • After compression 140.6 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. Leibniz-ipht.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 9 (27%)

Requests Now

33

After Optimization

24

  • Images
  • JavaScript
  • CSS

The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Leibniz Ipht. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

leibniz-ipht.de

leibniz-ipht.de

435 ms

www.leibniz-ipht.de

www.leibniz-ipht.de

334 ms

2597 ms

autoptimize_fc3a521d529d1334704805b7b753387d.css

autoptimize_fc3a521d529d1334704805b7b753387d.css

459 ms

jquery-1.11.1.min.js

jquery-1.11.1.min.js

445 ms

autoptimize_5e9619f4fd8955f25c01dde51b644593.js

autoptimize_5e9619f4fd8955f25c01dde51b644593.js

1006 ms

hooks.min.js

hooks.min.js

333 ms

i18n.min.js

i18n.min.js

333 ms

Logo_en.png

Logo_en.png

114 ms

pfeil_green.svg

pfeil_green.svg

111 ms

pfeil_weiss.svg

pfeil_weiss.svg

113 ms

lupe.svg

lupe.svg

112 ms

close_weiss.svg

close_weiss.svg

222 ms

linie.svg

linie.svg

221 ms

ipht-23-1120629-low-scaled.jpeg

ipht-23-1120629-low-scaled.jpeg

2569 ms

corinna-kufner-portraet-labor-scaled.jpg

corinna-kufner-portraet-labor-scaled.jpg

1691 ms

weiterlesen.svg

weiterlesen.svg

331 ms

wir-forschen-in-vielfalt-header.jpg

wir-forschen-in-vielfalt-header.jpg

3954 ms

ipht-1040394-scaled.jpg

ipht-1040394-scaled.jpg

5425 ms

thumb-sharepic-esulab-2024.jpg

thumb-sharepic-esulab-2024.jpg

5683 ms

time.svg

time.svg

702 ms

location.svg

location.svg

812 ms

jb-2023-titel-en-214x300.jpg

jb-2023-titel-en-214x300.jpg

6474 ms

topics002-300x262.png

topics002-300x262.png

7349 ms

j14111732-scaled.jpg

j14111732-scaled.jpg

8267 ms

leibniz-association-en-free-300x237.png

leibniz-association-en-free-300x237.png

8657 ms

berufundfamilie-2.svg

berufundfamilie-2.svg

9371 ms

arrow.svg

arrow.svg

5763 ms

file.svg

file.svg

5874 ms

ipht-4765.jpeg

ipht-4765.jpeg

10654 ms

ipht-6455-scaled.jpg

ipht-6455-scaled.jpg

11204 ms

totop.svg

totop.svg

7429 ms

x-twitter.svg

x-twitter.svg

7540 ms

linkedin.svg

linkedin.svg

7649 ms

instagram.svg

instagram.svg

7761 ms

youtube.svg

youtube.svg

7871 ms

open-sans-v18-latin-regular.woff

open-sans-v18-latin-regular.woff

7982 ms

fa-solid-900.woff

fa-solid-900.woff

8179 ms

fa-regular-400.woff

fa-regular-400.woff

8290 ms

fa-brands-400.woff

fa-brands-400.woff

8323 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

8401 ms

Accessibility Review

leibniz-ipht.de accessibility score

62

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

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

ARIA IDs are not unique

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

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

Best Practices

leibniz-ipht.de best practices score

83

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

Missing source maps for large first-party JavaScript

SEO Factors

leibniz-ipht.de SEO score

71

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

High

robots.txt is not valid

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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 doesn't use legible font sizes

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 Leibniz-ipht.de 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 Leibniz-ipht.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

leibniz-ipht.de

Open Graph data is detected on the main page of Leibniz Ipht. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: