Tools & Wizards About Us
uboatarchive.net screenshot

Report Summary

  • 98

    Performance

    Renders faster than
    95% of other websites

  • 46

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

uboatarchive.net

U-boat Archive

Page Load Speed

626 ms in total

First Response

127 ms

Resources Loaded

385 ms

Page Rendered

114 ms

uboatarchive.net screenshot

About Website

Visit uboatarchive.net now to see the best up-to-date U Boat Archive content for Russia and also check out these interesting facts you probably never knew about uboatarchive.net

Documents and photographs from the battle between German U-boats and Allied Forces in WWII

Visit uboatarchive.net

Key Findings

We analyzed Uboatarchive.net page load time and found that the first response time was 127 ms and then it took 499 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

uboatarchive.net performance score

98

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.8 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.8 s

98/100

25%

SI (Speed Index)

Value2.0 s

99/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value3.7 s

90/100

10%

Network Requests Diagram

uboatarchive.net

127 ms

widgets.js

44 ms

header.jpg

27 ms

104057M.jpg

37 ms

U960C2M.jpg

37 ms

Our browser made a total of 47 requests to load all elements on the main page. We found that 96% of them (45 requests) were addressed to the original Uboatarchive.net, 4% (2 requests) were made to Platform.twitter.com. The less responsive or slowest element that took the longest time to load (150 ms) relates to the external source Platform.twitter.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 24.4 kB (3%)

Content Size

747.8 kB

After Optimization

723.4 kB

  • HTML
  • Images

In fact, the total size of Uboatarchive.net main page is 747.8 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. 45% of websites need less resources to load. Images take 730.3 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 14.1 kB

  • Original 17.5 kB
  • After minification 16.5 kB
  • After compression 3.5 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 14.1 kB or 80% of the original size.

Image Optimization

-1%

Potential reduce by 10.3 kB

  • Original 730.3 kB
  • After minification 720.0 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. U Boat Archive images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

46

After Optimization

46

  • AJAX
  • Images
  • JavaScript

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of U Boat Archive. According to our analytics all requests are already optimized.

Network Requests Diagram

uboatarchive.net

uboatarchive.net

127 ms

widgets.js

widgets.js

44 ms

header.jpg

header.jpg

27 ms

104057M.jpg

104057M.jpg

37 ms

U960C2M.jpg

U960C2M.jpg

37 ms

2292XXM.jpg

2292XXM.jpg

37 ms

ButtonBaseIndividual.jpg

ButtonBaseIndividual.jpg

28 ms

ButtonBaseBdU.jpg

ButtonBaseBdU.jpg

40 ms

ButtonBasePOWs.jpg

ButtonBasePOWs.jpg

67 ms

ButtonBaseKTBs.jpg

ButtonBaseKTBs.jpg

67 ms

ButtonBaseBritish.jpg

ButtonBaseBritish.jpg

68 ms

ButtonBaseAbout.jpg

ButtonBaseAbout.jpg

69 ms

ButtonBaseU-570.jpg

ButtonBaseU-570.jpg

70 ms

ButtonBaseESF.jpg

ButtonBaseESF.jpg

70 ms

ButtonBaseU-505.jpg

ButtonBaseU-505.jpg

71 ms

ButtonBaseLinks.jpg

ButtonBaseLinks.jpg

71 ms

ButtonBaseDesign.jpg

ButtonBaseDesign.jpg

72 ms

ButtonBaseMiscellaneous.jpg

ButtonBaseMiscellaneous.jpg

73 ms

ButtonBaseTechnical.jpg

ButtonBaseTechnical.jpg

73 ms

ButtonBaseModeling.jpg

ButtonBaseModeling.jpg

73 ms

ButtonBaseContact.jpg

ButtonBaseContact.jpg

75 ms

208592M.jpg

208592M.jpg

74 ms

26G1565M.jpg

26G1565M.jpg

75 ms

26G2451M.jpg

26G2451M.jpg

76 ms

CremerPhotoM.jpg

CremerPhotoM.jpg

77 ms

UboatlistSpacer2.jpg

UboatlistSpacer2.jpg

77 ms

indexFlagIconGE.jpg

indexFlagIconGE.jpg

78 ms

indexFlagIconGEWWI.jpg

indexFlagIconGEWWI.jpg

80 ms

U490B5M.jpg

U490B5M.jpg

81 ms

43026M.jpg

43026M.jpg

92 ms

45934M.jpg

45934M.jpg

92 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

150 ms

ButtonRolloverIndividual.jpg

ButtonRolloverIndividual.jpg

14 ms

ButtonRolloverBdU.jpg

ButtonRolloverBdU.jpg

14 ms

ButtonRolloverPOWs.jpg

ButtonRolloverPOWs.jpg

14 ms

ButtonRolloverLinks.jpg

ButtonRolloverLinks.jpg

14 ms

ButtonRolloverKTBs.jpg

ButtonRolloverKTBs.jpg

15 ms

ButtonRolloverAbout.jpg

ButtonRolloverAbout.jpg

16 ms

ButtonRolloverU-505.jpg

ButtonRolloverU-505.jpg

17 ms

ButtonRolloverU-570.jpg

ButtonRolloverU-570.jpg

25 ms

ButtonRolloverBritish.jpg

ButtonRolloverBritish.jpg

26 ms

ButtonRolloverESF.jpg

ButtonRolloverESF.jpg

29 ms

ButtonRolloverMiscellaneous.jpg

ButtonRolloverMiscellaneous.jpg

28 ms

ButtonRolloverDesign.jpg

ButtonRolloverDesign.jpg

28 ms

ButtonRolloverModeling.jpg

ButtonRolloverModeling.jpg

30 ms

ButtonRolloverContact.jpg

ButtonRolloverContact.jpg

37 ms

ButtonRolloverTechnical.jpg

ButtonRolloverTechnical.jpg

36 ms

Accessibility Review

uboatarchive.net accessibility score

46

Accessibility Issues

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

uboatarchive.net best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

uboatarchive.net SEO score

67

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

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Uboatarchive.net can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Uboatarchive.net main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

uboatarchive.net

Open Graph description is not detected on the main page of U Boat Archive. 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: