Tools & Wizards About Us
dtmb.de screenshot

Report Summary

  • 64

    Performance

    Renders faster than
    78% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 50% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 84

    SEO

    Google-friendlier than
    53% of websites

dtmb.de

Stiftung Deutsches Technikmuseum Berlin

Page Load Speed

2.6 sec in total

First Response

292 ms

Resources Loaded

2.2 sec

Page Rendered

140 ms

dtmb.de screenshot

About Website

Visit dtmb.de now to see the best up-to-date Dtmb content and also check out these interesting facts you probably never knew about dtmb.de

Entdecken Sie die Vielfalt alter und neuer Technik: Flugzeuge, Schiffe, Lokomotiven, den ersten Computer der Welt und vieles mehr!

Visit dtmb.de

Key Findings

We analyzed Dtmb.de page load time and found that the first response time was 292 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster. This domain responded with an error, which can significantly jeopardize Dtmb.de rating and web reputation

Performance Metrics

dtmb.de performance score

64

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

59/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

47/100

25%

SI (Speed Index)

Value6.3 s

42/100

10%

TBT (Total Blocking Time)

Value340 ms

74/100

30%

CLS (Cumulative Layout Shift)

Value0.015

100/100

15%

TTI (Time to Interactive)

Value7.8 s

45/100

10%

Network Requests Diagram

dtmb.de

292 ms

www.sdtb.de

753 ms

stylesheet_ba1306dc70.css

130 ms

screen.css

193 ms

opera.css

215 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Dtmb.de, 97% (32 requests) were made to Sdtb.de. The less responsive or slowest element that took the longest time to load (753 ms) relates to the external source Sdtb.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 175.3 kB (48%)

Content Size

366.1 kB

After Optimization

190.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dtmb.de main page is 366.1 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 10% of websites need less resources to load. Images take 171.0 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 13.6 kB

  • Original 18.2 kB
  • After minification 16.0 kB
  • After compression 4.6 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 2.3 kB, which is 12% 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 13.6 kB or 75% of the original size.

Image Optimization

-20%

Potential reduce by 33.9 kB

  • Original 171.0 kB
  • After minification 137.1 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. Obviously, Dtmb needs image optimization as it can save up to 33.9 kB or 20% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-68%

Potential reduce by 85.4 kB

  • Original 125.5 kB
  • After minification 119.2 kB
  • After compression 40.1 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 85.4 kB or 68% of the original size.

CSS Optimization

-82%

Potential reduce by 42.4 kB

  • Original 51.4 kB
  • After minification 39.2 kB
  • After compression 9.1 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. Dtmb.de needs all CSS files to be minified and compressed as it can save up to 42.4 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (50%)

Requests Now

30

After Optimization

15

  • Images
  • JavaScript
  • CSS

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dtmb. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

dtmb.de

dtmb.de

292 ms

www.sdtb.de

www.sdtb.de

753 ms

stylesheet_ba1306dc70.css

stylesheet_ba1306dc70.css

130 ms

screen.css

screen.css

193 ms

opera.css

opera.css

215 ms

behaviour.js

behaviour.js

326 ms

jquery-1.7.1.min.js

jquery-1.7.1.min.js

549 ms

jquery.socialshareprivacy.min.js

jquery.socialshareprivacy.min.js

231 ms

socialshareprivacy.css

socialshareprivacy.css

286 ms

basics.css

basics.css

134 ms

content.css

content.css

139 ms

nav.css

nav.css

153 ms

special.css

special.css

193 ms

bg_more.gif

bg_more.gif

115 ms

bg_more_hover.gif

bg_more_hover.gif

113 ms

bg_websites_shadow_list_l.jpg

bg_websites_shadow_list_l.jpg

118 ms

bg_header.jpg

bg_header.jpg

122 ms

bg_service_english.gif

bg_service_english.gif

103 ms

bg_service_sitemap.gif

bg_service_sitemap.gif

115 ms

bg_stiftung_mainnav_gradien.jpg

bg_stiftung_mainnav_gradien.jpg

115 ms

logo.gif

logo.gif

115 ms

next_entry.jpg

next_entry.jpg

198 ms

start_box_tem.jpg

start_box_tem.jpg

227 ms

start_box_more.jpg

start_box_more.jpg

229 ms

start_box_tev.jpg

start_box_tev.jpg

229 ms

start_box_sci_05.jpg

start_box_sci_05.jpg

232 ms

start_box_arc.jpg

start_box_arc.jpg

240 ms

start_box_zei_04.jpg

start_box_zei_04.jpg

297 ms

310_106_collage_zucker_hoch-detail-oben.jpg

310_106_collage_zucker_hoch-detail-oben.jpg

341 ms

follow-us-fb.jpg

follow-us-fb.jpg

339 ms

bg_footer_help.gif

bg_footer_help.gif

338 ms

bg_boxteaser_bottom.gif

bg_boxteaser_bottom.gif

112 ms

print.css

print.css

112 ms

Accessibility Review

dtmb.de accessibility score

80

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-*] attributes do not match their roles

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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

Best Practices

dtmb.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

SEO Factors

dtmb.de SEO score

84

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

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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

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

dtmb.de

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