Tools & Wizards About Us
dhm.de screenshot

Report Summary

  • 58

    Performance

    Renders faster than
    74% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

dhm.de

Deutsches Historisches Museum

Page Load Speed

5.6 sec in total

First Response

638 ms

Resources Loaded

4.2 sec

Page Rendered

766 ms

dhm.de screenshot

About Website

Click here to check amazing Dhm content for Germany. Otherwise, check out these important facts you probably never knew about dhm.de

Das Deutsche Historische Museum in Berlin ist Deutschlands nationales Geschichtsmuseum und eines der größten Geschichtsmuseen der Welt. Der Zugang ist barrierefrei.

Visit dhm.de

Key Findings

We analyzed Dhm.de page load time and found that the first response time was 638 ms and then it took 5 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

dhm.de performance score

58

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

78/100

10%

LCP (Largest Contentful Paint)

Value6.4 s

10/100

25%

SI (Speed Index)

Value6.5 s

38/100

10%

TBT (Total Blocking Time)

Value300 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.9 s

53/100

10%

Network Requests Diagram

www.dhm.de

638 ms

merged-655cc1aefda64166c2f65208cd009e4d-0ba29e89572e5724e0bebf2200f34279.css

523 ms

merged-81e46f2e324e974af57ea858682ffa0d-446cab870157fe58f3be59b98929f796.js

416 ms

merged-f1f12b544d4927c2d546e20d33cfc3a1-aa9c5d623902a3ad0913852c5862d2b4.js

314 ms

merged-926e9ce9547fce21086508ae8f848eb4-7d7d655da535b53cb8f18ac29a13c597.js

742 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that all of those requests were addressed to Dhm.de and no external sources were called. The less responsive or slowest element that took the longest time to load (2.4 sec) belongs to the original domain Dhm.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 117.2 kB (6%)

Content Size

2.0 MB

After Optimization

1.9 MB

  • HTML
  • Images

In fact, the total size of Dhm.de main page is 2.0 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. 20% of websites need less resources to load. Images take 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 117.2 kB

  • Original 131.4 kB
  • After minification 74.7 kB
  • After compression 14.2 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 56.7 kB, which is 43% 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 117.2 kB or 89% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 1.8 MB
  • After minification 1.8 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. Dhm images are well optimized though.

Requests Breakdown

Number of requests can be reduced by 4 (20%)

Requests Now

20

After Optimization

16

  • Images
  • JavaScript
  • CSS

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dhm. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

www.dhm.de

www.dhm.de

638 ms

merged-655cc1aefda64166c2f65208cd009e4d-0ba29e89572e5724e0bebf2200f34279.css

merged-655cc1aefda64166c2f65208cd009e4d-0ba29e89572e5724e0bebf2200f34279.css

523 ms

merged-81e46f2e324e974af57ea858682ffa0d-446cab870157fe58f3be59b98929f796.js

merged-81e46f2e324e974af57ea858682ffa0d-446cab870157fe58f3be59b98929f796.js

416 ms

merged-f1f12b544d4927c2d546e20d33cfc3a1-aa9c5d623902a3ad0913852c5862d2b4.js

merged-f1f12b544d4927c2d546e20d33cfc3a1-aa9c5d623902a3ad0913852c5862d2b4.js

314 ms

merged-926e9ce9547fce21086508ae8f848eb4-7d7d655da535b53cb8f18ac29a13c597.js

merged-926e9ce9547fce21086508ae8f848eb4-7d7d655da535b53cb8f18ac29a13c597.js

742 ms

csm_RNT_Header_2_51bd97c842.jpg

csm_RNT_Header_2_51bd97c842.jpg

898 ms

csm_DHM_Biermann_Website_Header_2600x1463_00_e69416e0a0.jpg

csm_DHM_Biermann_Website_Header_2600x1463_00_e69416e0a0.jpg

1007 ms

csm_RIG_Website_Header_cd6bcea3bb.jpg

csm_RIG_Website_Header_cd6bcea3bb.jpg

812 ms

csm__VB_2035_9b2a39a95c.jpg

csm__VB_2035_9b2a39a95c.jpg

813 ms

csm_3_Kinderf%C3%BChrung_Wolf_Biermann._Ein_Lyriker_und_Liedermacher_in_Deutschland__c__DHM__Foto_Maria_Altnau_5d0603fd82.jpg

csm_3_Kinderf%C3%BChrung_Wolf_Biermann._Ein_Lyriker_und_Liedermacher_in_Deutschland__c__DHM__Foto_Maria_Altnau_5d0603fd82.jpg

818 ms

csm__VB_1973_3e36ed930b.jpg

csm__VB_1973_3e36ed930b.jpg

802 ms

csm_Ansicht_01__c__Ahlers_26b4616b01.jpg

csm_Ansicht_01__c__Ahlers_26b4616b01.jpg

1514 ms

csm_RNT_Begleitheft_0f31a1090d.jpg

csm_RNT_Begleitheft_0f31a1090d.jpg

1321 ms

csm_Provenienzforschung_1_1343_web_dc94f4216d.jpg

csm_Provenienzforschung_1_1343_web_dc94f4216d.jpg

1336 ms

csm_csm_csm_BA170099_38dcc8cd6a_08_0228a94ba8_57f5cb5dce.jpg

csm_csm_csm_BA170099_38dcc8cd6a_08_0228a94ba8_57f5cb5dce.jpg

1329 ms

csm_02_DHM_Ausstellungshalle_und_Zeughaus__c__Thomas_Bruns_a5a46700c3.jpg

csm_02_DHM_Ausstellungshalle_und_Zeughaus__c__Thomas_Bruns_a5a46700c3.jpg

1506 ms

csm_00000297_cbc8e099a3.jpg

csm_00000297_cbc8e099a3.jpg

1615 ms

csm_druck_visitberlin_dhm_weiland-11_7083805db6.jpg

csm_druck_visitberlin_dhm_weiland-11_7083805db6.jpg

1967 ms

csm_05_DHM_Ausstellungshalle__c__Thomas_Bruns_ed97553656.jpg

csm_05_DHM_Ausstellungshalle__c__Thomas_Bruns_ed97553656.jpg

1944 ms

PlutoSansRegular.woff

PlutoSansRegular.woff

1615 ms

PlutoSansMedium.woff

PlutoSansMedium.woff

1787 ms

PlutoSansLight.woff

PlutoSansLight.woff

1816 ms

PlutoSansExtraLight.woff

PlutoSansExtraLight.woff

1896 ms

PlutoSansCondThin.woff

PlutoSansCondThin.woff

2036 ms

PlutoSansThin.woff

PlutoSansThin.woff

2194 ms

PlutoSansBold.woff

PlutoSansBold.woff

2240 ms

PlutoSansHeavy.woff

PlutoSansHeavy.woff

2270 ms

PlutoSansBlack.woff

PlutoSansBlack.woff

2270 ms

icomoon-1697021125.ttf

icomoon-1697021125.ttf

2212 ms

vendors~axios-81af8996cddba1e80b8d.js

vendors~axios-81af8996cddba1e80b8d.js

2218 ms

glide-360e54265c265d90fe1f.js

glide-360e54265c265d90fe1f.js

2360 ms

Accessibility Review

dhm.de accessibility score

79

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

High

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

High

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

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

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

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

Best Practices

dhm.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

dhm.de SEO score

77

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

Document doesn't have a valid hreflang

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 Dhm.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 Dhm.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

dhm.de

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