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 19% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 67

    SEO

    Google-friendlier than
    25% of websites

uboatarchive.net

U-boat Archive

Page Load Speed

728 ms in total

First Response

123 ms

Resources Loaded

431 ms

Page Rendered

174 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 123 ms and then it took 605 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)

Value1.3 s

98/100

10%

LCP (Largest Contentful Paint)

Value1.9 s

98/100

25%

SI (Speed Index)

Value2.3 s

99/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value3.5 s

92/100

10%

Network Requests Diagram

uboatarchive.net

123 ms

widgets.js

13 ms

6.js

312 ms

header.jpg

67 ms

104057M.jpg

64 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that 85% of them (28 requests) were addressed to the original Uboatarchive.net, 9% (3 requests) were made to Platform.twitter.com and 3% (1 request) were made to Rd.revolvermaps.com. The less responsive or slowest element that took the longest time to load (312 ms) relates to the external source Rd.revolvermaps.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 20.7 kB (4%)

Content Size

499.2 kB

After Optimization

478.5 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Uboatarchive.net main page is 499.2 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. 35% of websites need less resources to load. Images take 482.9 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 11.1 kB

  • Original 14.5 kB
  • After minification 13.9 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 11.1 kB or 76% of the original size.

Image Optimization

-2%

Potential reduce by 8.8 kB

  • Original 482.9 kB
  • After minification 474.1 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. U Boat Archive images are well optimized though.

JavaScript Optimization

-47%

Potential reduce by 861 B

  • Original 1.8 kB
  • After minification 1.8 kB
  • After compression 968 B

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 861 B or 47% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

32

After Optimization

32

  • AJAX
  • Images
  • JavaScript

The browser has sent 32 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

123 ms

widgets.js

widgets.js

13 ms

6.js

6.js

312 ms

header.jpg

header.jpg

67 ms

104057M.jpg

104057M.jpg

64 ms

U960C2M.jpg

U960C2M.jpg

64 ms

2292XXM.jpg

2292XXM.jpg

62 ms

ButtonBaseIndividual.jpg

ButtonBaseIndividual.jpg

39 ms

ButtonBaseBdU.jpg

ButtonBaseBdU.jpg

38 ms

ButtonBasePOWs.jpg

ButtonBasePOWs.jpg

63 ms

ButtonBaseKTBs.jpg

ButtonBaseKTBs.jpg

64 ms

ButtonBaseBritish.jpg

ButtonBaseBritish.jpg

70 ms

ButtonBaseAbout.jpg

ButtonBaseAbout.jpg

84 ms

ButtonBaseU-570.jpg

ButtonBaseU-570.jpg

84 ms

ButtonBaseESF.jpg

ButtonBaseESF.jpg

93 ms

ButtonBaseU-505.jpg

ButtonBaseU-505.jpg

78 ms

ButtonBaseLinks.jpg

ButtonBaseLinks.jpg

85 ms

ButtonBaseDesign.jpg

ButtonBaseDesign.jpg

106 ms

ButtonBaseMiscellaneous.jpg

ButtonBaseMiscellaneous.jpg

98 ms

ButtonBaseTechnical.jpg

ButtonBaseTechnical.jpg

105 ms

ButtonBaseAssociation.jpg

ButtonBaseAssociation.jpg

117 ms

ButtonBaseContact.jpg

ButtonBaseContact.jpg

106 ms

208592M.jpg

208592M.jpg

128 ms

26G1565M.jpg

26G1565M.jpg

132 ms

26G2451M.jpg

26G2451M.jpg

153 ms

UboatlistSpacer1.jpg

UboatlistSpacer1.jpg

126 ms

indexFlagIconGE.jpg

indexFlagIconGE.jpg

124 ms

U490B5M.jpg

U490B5M.jpg

150 ms

43026M.jpg

43026M.jpg

157 ms

45934M.jpg

45934M.jpg

160 ms

button.3ccb64e61d4c01fae12cd2b0ed9b2bab.js

button.3ccb64e61d4c01fae12cd2b0ed9b2bab.js

17 ms

follow_button.f8c8d971a6ac545cf416e3c1ad4bbc65.en.html

follow_button.f8c8d971a6ac545cf416e3c1ad4bbc65.en.html

17 ms

jot

jot

85 ms

Accessibility Review

uboatarchive.net accessibility score

46

Accessibility Issues

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

Best Practices

uboatarchive.net best practices score

67

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

General

Impact

Issue

High

Issues were logged in the Issues panel in Chrome Devtools

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: