Tools & Wizards About Us
rapp-opto.de screenshot

Report Summary

  • 70

    Performance

    Renders faster than
    81% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

rapp-opto.de

Rapp OptoElectronic microscopy photomanipulation & illumination › Rapp OptoElectronic

Page Load Speed

4.8 sec in total

First Response

388 ms

Resources Loaded

4.2 sec

Page Rendered

200 ms

rapp-opto.de screenshot

About Website

Welcome to rapp-opto.de homepage info - get ready to check Rapp Opto best content right away, or after learning these important things about rapp-opto.de

Rapp OptoElectronic is specialized in high-performance photomanipulation and illumination systems, microscope modification, multi-photon-, spinning disk- and deep-UV microscopy and accessories. The hi...

Visit rapp-opto.de

Key Findings

We analyzed Rapp-opto.de page load time and found that the first response time was 388 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

rapp-opto.de performance score

70

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

32/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

58/100

25%

SI (Speed Index)

Value7.6 s

26/100

10%

TBT (Total Blocking Time)

Value180 ms

92/100

30%

CLS (Cumulative Layout Shift)

Value0.01

100/100

15%

TTI (Time to Interactive)

Value5.2 s

74/100

10%

Network Requests Diagram

rapp-opto.de

388 ms

rapp-opto.com

2152 ms

style.min.css

313 ms

delightful-downloads.min.css

319 ms

general.css

317 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Rapp-opto.de, 96% (55 requests) were made to Rapp-opto.com and 2% (1 request) were made to Maxcdn.bootstrapcdn.com. The less responsive or slowest element that took the longest time to load (2.2 sec) relates to the external source Rapp-opto.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.2 MB (68%)

Content Size

1.8 MB

After Optimization

593.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Rapp-opto.de main page is 1.8 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. 45% of websites need less resources to load. CSS take 723.3 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 112.9 kB

  • Original 133.0 kB
  • After minification 129.2 kB
  • After compression 20.1 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 112.9 kB or 85% of the original size.

Image Optimization

-0%

Potential reduce by 1.3 kB

  • Original 274.0 kB
  • After minification 272.7 kB

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. Rapp Opto images are well optimized though.

JavaScript Optimization

-73%

Potential reduce by 517.4 kB

  • Original 706.8 kB
  • After minification 675.8 kB
  • After compression 189.5 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 517.4 kB or 73% of the original size.

CSS Optimization

-85%

Potential reduce by 612.3 kB

  • Original 723.3 kB
  • After minification 689.6 kB
  • After compression 111.1 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. Rapp-opto.de needs all CSS files to be minified and compressed as it can save up to 612.3 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 32 (63%)

Requests Now

51

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 51 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rapp Opto. 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 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

rapp-opto.de

rapp-opto.de

388 ms

rapp-opto.com

rapp-opto.com

2152 ms

style.min.css

style.min.css

313 ms

delightful-downloads.min.css

delightful-downloads.min.css

319 ms

general.css

general.css

317 ms

lazyload-shared.css

lazyload-shared.css

319 ms

mediaelementplayer-legacy.min.css

mediaelementplayer-legacy.min.css

324 ms

wp-mediaelement.min.css

wp-mediaelement.min.css

326 ms

eventon_styles.css

eventon_styles.css

525 ms

font-awesome.css

font-awesome.css

531 ms

eventon_dynamic_styles.css

eventon_dynamic_styles.css

427 ms

el_styles.css

el_styles.css

429 ms

font-awesome.min.css

font-awesome.min.css

28 ms

frontend.css

frontend.css

435 ms

avia-merged-styles-df42887c4532bb43abc854c09b0d6797---6530cbfaca23c.css

avia-merged-styles-df42887c4532bb43abc854c09b0d6797---6530cbfaca23c.css

946 ms

post-551.css

post-551.css

537 ms

jquery.min.js

jquery.min.js

742 ms

avia-head-scripts-88f307861d1b26ca1fd07d7593f5cb24---652d03ad1067c.js

avia-head-scripts-88f307861d1b26ca1fd07d7593f5cb24---652d03ad1067c.js

545 ms

frontend.js

frontend.js

634 ms

jquery.tablesorter-min.js

jquery.tablesorter-min.js

639 ms

general.js

general.js

747 ms

lazyload-shared.js

lazyload-shared.js

653 ms

lazyload-youtube.js

lazyload-youtube.js

745 ms

lazyload-vimeo.js

lazyload-vimeo.js

749 ms

mediaelement-and-player.min.js

mediaelement-and-player.min.js

1069 ms

mediaelement-migrate.min.js

mediaelement-migrate.min.js

849 ms

wp-mediaelement.min.js

wp-mediaelement.min.js

856 ms

eventon_functions.js

eventon_functions.js

860 ms

handlebars.js

handlebars.js

1017 ms

jquery.mobile.min.js

jquery.mobile.min.js

1016 ms

jquery.mousewheel.min.js

jquery.mousewheel.min.js

1017 ms

eventon_script.js

eventon_script.js

1017 ms

eventon_init_gmap_blank.js

eventon_init_gmap_blank.js

1054 ms

eventon_gen_maps_none.js

eventon_gen_maps_none.js

1084 ms

el_script.js

el_script.js

1085 ms

avia-footer-scripts-4cc5a19279bd2f7858b12a3ab12fc09a---6530cbfb0f589.js

avia-footer-scripts-4cc5a19279bd2f7858b12a3ab12fc09a---6530cbfb0f589.js

1179 ms

rapp-logo-340pxblau-300x79.png

rapp-logo-340pxblau-300x79.png

112 ms

icob-2024-300x169.webp

icob-2024-300x169.webp

173 ms

analytica.gif

analytica.gif

190 ms

elmi_logo.tif

elmi_logo.tif

499 ms

elmi_logo-300x135.jpg

elmi_logo-300x135.jpg

210 ms

photomanipulation_overview_2x2-300x213.png

photomanipulation_overview_2x2-300x213.png

224 ms

microscopy_and_imaging_overview_2x2-300x213.png

microscopy_and_imaging_overview_2x2-300x213.png

282 ms

microscope_accessories_overview_2x2-300x213.png

microscope_accessories_overview_2x2-300x213.png

302 ms

illumination_systems_overview_2x2-300x213.png

illumination_systems_overview_2x2-300x213.png

303 ms

cutting-actin-bundels-in-single-cells-180x180.png

cutting-actin-bundels-in-single-cells-180x180.png

306 ms

investigating-dna-repair-pathways-by-local-uv-c-irradiation-180x180.jpg

investigating-dna-repair-pathways-by-local-uv-c-irradiation-180x180.jpg

335 ms

flirt_canman_lab_01_preview_small-180x180.jpg

flirt_canman_lab_01_preview_small-180x180.jpg

392 ms

analyzing-calcium-responses-in-acute-brain-slices-induced-by-uv-uncaging_icon-180x180.png

analyzing-calcium-responses-in-acute-brain-slices-induced-by-uv-uncaging_icon-180x180.png

412 ms

optogenetical-stimulation-in-acute-brain-slices_icon-180x180.png

optogenetical-stimulation-in-acute-brain-slices_icon-180x180.png

415 ms

kuepper-frap-icon-180x180.png

kuepper-frap-icon-180x180.png

419 ms

photoconversion-of-meos2_thorn_icon-180x180.png

photoconversion-of-meos2_thorn_icon-180x180.png

447 ms

barlow-condensed-v1-latin-600.woff

barlow-condensed-v1-latin-600.woff

488 ms

barlow-condensed-v1-latin-regular.woff

barlow-condensed-v1-latin-regular.woff

504 ms

barlow-condensed-v1-latin-200.woff

barlow-condensed-v1-latin-200.woff

511 ms

entypo-fontello.woff

entypo-fontello.woff

525 ms

parallax_bg2-1030x315.png

parallax_bg2-1030x315.png

617 ms

Accessibility Review

rapp-opto.de 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-hidden="true"] elements contain focusable descendents

High

[role]s are not contained by their required parent element

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>).

Best Practices

rapp-opto.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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

rapp-opto.de SEO score

85

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 Rapp-opto.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 Rapp-opto.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

rapp-opto.de

Open Graph description is not detected on the main page of Rapp Opto. 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: