Tools & Wizards About Us
leibniz-ipht.de screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 62

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 71

    SEO

    Google-friendlier than
    30% of websites

leibniz-ipht.de

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

Page Load Speed

6.7 sec in total

First Response

325 ms

Resources Loaded

5.7 sec

Page Rendered

593 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 325 ms and then it took 6.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

leibniz-ipht.de performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

13/100

10%

LCP (Largest Contentful Paint)

Value13.0 s

0/100

25%

SI (Speed Index)

Value14.2 s

1/100

10%

TBT (Total Blocking Time)

Value6,230 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value13.3 s

12/100

10%

Network Requests Diagram

leibniz-ipht.de

325 ms

www.leibniz-ipht.de

350 ms

1664 ms

autoptimize_f260737a6e3be4ee3d07ae864f08d66a.css

447 ms

jquery-1.11.1.min.js

433 ms

Our browser made a total of 34 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 (2.1 sec) belongs to the original domain Leibniz-ipht.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 159.3 kB (9%)

Content Size

1.7 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Leibniz-ipht.de main page is 1.7 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. 35% of websites need less resources to load. Images take 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 100.0 kB

  • Original 112.0 kB
  • After minification 72.4 kB
  • After compression 12.0 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. This page needs HTML code to be minified as it can gain 39.6 kB, which is 35% 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 100.0 kB or 89% of the original size.

Image Optimization

-4%

Potential reduce by 58.5 kB

  • Original 1.4 MB
  • After minification 1.4 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 40 B

  • Original 38.2 kB
  • After minification 38.2 kB
  • After compression 38.2 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 700 B

  • Original 123.3 kB
  • After minification 123.3 kB
  • After compression 122.7 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. Leibniz-ipht.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 5 (19%)

Requests Now

26

After Optimization

21

  • Images
  • JavaScript
  • CSS

The browser has sent 26 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 and as a result speed up the page load time.

Network Requests Diagram

leibniz-ipht.de

leibniz-ipht.de

325 ms

www.leibniz-ipht.de

www.leibniz-ipht.de

350 ms

1664 ms

autoptimize_f260737a6e3be4ee3d07ae864f08d66a.css

autoptimize_f260737a6e3be4ee3d07ae864f08d66a.css

447 ms

jquery-1.11.1.min.js

jquery-1.11.1.min.js

433 ms

autoptimize_5884e8d41cdfe6da5db276b1339a31d0.js

autoptimize_5884e8d41cdfe6da5db276b1339a31d0.js

1086 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

114 ms

Logo.svg

Logo.svg

111 ms

pfeil_green.svg

pfeil_green.svg

107 ms

pfeil_weiss.svg

pfeil_weiss.svg

183 ms

lupe.svg

lupe.svg

219 ms

close_weiss.svg

close_weiss.svg

219 ms

linie.svg

linie.svg

288 ms

ipht-2663.jpeg

ipht-2663.jpeg

911 ms

webseite-3.jpg

webseite-3.jpg

1161 ms

weiterlesen.svg

weiterlesen.svg

324 ms

dagmar-schipanski.jpg

dagmar-schipanski.jpg

1189 ms

webseite-2.jpg

webseite-2.jpg

1315 ms

topics002-300x262.png

topics002-300x262.png

1493 ms

j14111732-scaled.jpg

j14111732-scaled.jpg

1893 ms

logo-weiss.png

logo-weiss.png

1628 ms

ipht-4765.jpeg

ipht-4765.jpeg

2142 ms

ipht-6455-scaled.jpg

ipht-6455-scaled.jpg

2104 ms

totop.svg

totop.svg

1375 ms

facebook.svg

facebook.svg

1481 ms

twitter.svg

twitter.svg

1553 ms

linkedin.svg

linkedin.svg

1587 ms

instagram.svg

instagram.svg

1658 ms

youtube.svg

youtube.svg

1686 ms

open-sans-v18-latin-regular.woff

open-sans-v18-latin-regular.woff

1692 ms

fa-solid-900.woff

fa-solid-900.woff

1829 ms

fa-regular-400.woff

fa-regular-400.woff

1749 ms

fa-brands-400.woff

fa-brands-400.woff

1762 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

1963 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

    DE

  • 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 does not match the claimed German 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: