Tools & Wizards About Us

Report Summary

  • 98

    Performance

    Renders faster than
    95% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

divejapan.com

Dive Japan

Page Load Speed

1.2 sec in total

First Response

152 ms

Resources Loaded

726 ms

Page Rendered

298 ms

About Website

Visit divejapan.com now to see the best up-to-date Dive Japan content and also check out these interesting facts you probably never knew about divejapan.com

Scuba diving in Japan: I am making links to the scuba diving videos that make me feel like I am diving myself, along with other information on the location, such as topography and tourism.

Visit divejapan.com

Key Findings

We analyzed Divejapan.com page load time and found that the first response time was 152 ms and then it took 1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

divejapan.com performance score

98

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.9 s

88/100

10%

LCP (Largest Contentful Paint)

Value1.9 s

98/100

25%

SI (Speed Index)

Value1.9 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.9 s

100/100

10%

Network Requests Diagram

divejapan.com

152 ms

font_2011.css

34 ms

show_ads.js

6 ms

ga.js

65 ms

zrt_lookup.html

195 ms

Our browser made a total of 59 requests to load all elements on the main page. We found that 69% of them (41 requests) were addressed to the original Divejapan.com, 10% (6 requests) were made to Tpc.googlesyndication.com and 8% (5 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (254 ms) relates to the external source Googleads.g.doubleclick.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 69.6 kB (22%)

Content Size

321.7 kB

After Optimization

252.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Divejapan.com main page is 321.7 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 213.5 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 26.3 kB

  • Original 32.2 kB
  • After minification 28.3 kB
  • After compression 6.0 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 4.0 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 26.3 kB or 81% of the original size.

Image Optimization

-3%

Potential reduce by 6.9 kB

  • Original 213.5 kB
  • After minification 206.6 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. Dive Japan images are well optimized though.

JavaScript Optimization

-48%

Potential reduce by 35.8 kB

  • Original 74.9 kB
  • After minification 74.8 kB
  • After compression 39.1 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 35.8 kB or 48% of the original size.

CSS Optimization

-70%

Potential reduce by 675 B

  • Original 971 B
  • After minification 688 B
  • After compression 296 B

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. Divejapan.com needs all CSS files to be minified and compressed as it can save up to 675 B or 70% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (24%)

Requests Now

58

After Optimization

44

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dive Japan. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

divejapan.com accessibility score

65

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

Best Practices

divejapan.com 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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

SEO Factors

divejapan.com 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-UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Divejapan.com 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 Divejapan.com main page’s claimed encoding is iso-utf-8. 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

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