Tools & Wizards About Us

Report Summary

  • 46

    Performance

    Renders faster than
    64% 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

photonics4life.eu

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

Page Load Speed

18.6 sec in total

First Response

246 ms

Resources Loaded

17.6 sec

Page Rendered

747 ms

About Website

Welcome to photonics4life.eu homepage info - get ready to check Photonics 4 Life best content right away, or after learning these important things about photonics4life.eu

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

Visit photonics4life.eu

Key Findings

We analyzed Photonics4life.eu page load time and found that the first response time was 246 ms and then it took 18.3 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

photonics4life.eu performance score

46

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

59/100

10%

LCP (Largest Contentful Paint)

Value11.5 s

0/100

25%

SI (Speed Index)

Value9.1 s

14/100

10%

TBT (Total Blocking Time)

Value370 ms

71/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value9.9 s

27/100

10%

Network Requests Diagram

photonics4life.eu

246 ms

2217 ms

autoptimize_0a98b666ad814b513394ebdc42c6e376.css

409 ms

jquery-1.11.1.min.js

404 ms

autoptimize_c0ff38cb7534947eed1e1f9b3d4440f3.js

721 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Photonics4life.eu, 98% (40 requests) were made to Leibniz-ipht.de. The less responsive or slowest element that took the longest time to load (13.1 sec) relates to the external source Leibniz-ipht.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 158.4 kB (2%)

Content Size

10.5 MB

After Optimization

10.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Photonics4life.eu main page is 10.5 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 9.7 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 104.3 kB

  • Original 117.6 kB
  • After minification 77.2 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 40.4 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 104.3 kB or 89% of the original size.

Image Optimization

-1%

Potential reduce by 53.2 kB

  • Original 9.7 MB
  • After minification 9.7 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. Photonics 4 Life images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 36 B

  • Original 458.4 kB
  • After minification 458.4 kB
  • After compression 458.4 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 864 B

  • Original 142.5 kB
  • After minification 142.5 kB
  • After compression 141.6 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. Photonics4life.eu has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 9 (26%)

Requests Now

34

After Optimization

25

  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Photonics 4 Life. 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

Accessibility Review

photonics4life.eu 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

photonics4life.eu 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

photonics4life.eu 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 Photonics4life.eu 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 Photonics4life.eu 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

Open Graph data is detected on the main page of Photonics 4 Life. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: