Tools & Wizards About Us

Report Summary

  • 64

    Performance

    Renders faster than
    77% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

scuba-do-zanzibar.com

Scuba Do Zanzibar | Best Zanzibar Diving, Snorkelling & PADI Courses

Page Load Speed

902 ms in total

First Response

32 ms

Resources Loaded

445 ms

Page Rendered

425 ms

About Website

Visit scuba-do-zanzibar.com now to see the best up-to-date Scuba Do Zanzibar content for Netherlands and also check out these interesting facts you probably never knew about scuba-do-zanzibar.com

Welcome to Scuba Do Zanzibar! We offer the best of scuba diving Zanzibar as well as snorkelling tours, PADI scuba diving courses and yacht sailing. We are eco-friendly and passionate about conservatio...

Visit scuba-do-zanzibar.com

Key Findings

We analyzed Scuba-do-zanzibar.com page load time and found that the first response time was 32 ms and then it took 870 ms 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

scuba-do-zanzibar.com performance score

64

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

84/100

10%

LCP (Largest Contentful Paint)

Value3.6 s

60/100

25%

SI (Speed Index)

Value4.0 s

80/100

10%

TBT (Total Blocking Time)

Value300 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0.47

18/100

15%

TTI (Time to Interactive)

Value6.1 s

63/100

10%

Network Requests Diagram

scuba-do-zanzibar.com

32 ms

scuba-do-zanzibar.com

31 ms

js

68 ms

bootstrap.min.css

14 ms

css

45 ms

Our browser made a total of 56 requests to load all elements on the main page. We found that 77% of them (43 requests) were addressed to the original Scuba-do-zanzibar.com, 14% (8 requests) were made to Fonts.gstatic.com and 5% (3 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (126 ms) relates to the external source Fonts.gstatic.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 747.5 kB (44%)

Content Size

1.7 MB

After Optimization

959.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Scuba-do-zanzibar.com main page is 1.7 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. 65% of websites need less resources to load. Images take 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 27.4 kB

  • Original 34.3 kB
  • After minification 26.9 kB
  • After compression 7.0 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 7.4 kB, which is 22% 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 27.4 kB or 80% of the original size.

Image Optimization

-45%

Potential reduce by 613.6 kB

  • Original 1.4 MB
  • After minification 750.2 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, Scuba Do Zanzibar needs image optimization as it can save up to 613.6 kB or 45% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-38%

Potential reduce by 97.6 kB

  • Original 255.1 kB
  • After minification 215.0 kB
  • After compression 157.5 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 97.6 kB or 38% of the original size.

CSS Optimization

-17%

Potential reduce by 8.9 kB

  • Original 53.3 kB
  • After minification 52.9 kB
  • After compression 44.4 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. Scuba-do-zanzibar.com needs all CSS files to be minified and compressed as it can save up to 8.9 kB or 17% of the original size.

Requests Breakdown

Number of requests can be reduced by 26 (63%)

Requests Now

41

After Optimization

15

  • Images
  • JavaScript
  • CSS

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Scuba Do Zanzibar. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

scuba-do-zanzibar.com accessibility score

93

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Best Practices

scuba-do-zanzibar.com best practices score

67

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

scuba-do-zanzibar.com SEO score

98

Search Engine Optimization Advices

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

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

Open Graph description is not detected on the main page of Scuba Do Zanzibar. 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: