Tools & Wizards About Us

Report Summary

  • 90

    Performance

    Renders faster than
    91% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 61% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

openzoom.org

OpenZoom: Promoting and Supporting High-Resolution Images & Zoomable User Interfaces (ZUIs) on the Web

Page Load Speed

384 ms in total

First Response

17 ms

Resources Loaded

254 ms

Page Rendered

113 ms

About Website

Click here to check amazing Open Zoom content. Otherwise, check out these important facts you probably never knew about openzoom.org

OpenZoom: Promoting and Supporting High-Resolution Images & Zoomable User Interfaces (ZUIs) on the Web.

Visit openzoom.org

Key Findings

We analyzed Openzoom.org page load time and found that the first response time was 17 ms and then it took 367 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

openzoom.org performance score

90

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

60/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

78/100

25%

SI (Speed Index)

Value2.7 s

96/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.7 s

97/100

10%

Network Requests Diagram

openzoom.org

17 ms

openzoom.org

37 ms

www.openzoom.org

89 ms

a0c4a75275bd5c4037acff12e56b2133b72ef24e.css

19 ms

ga.js

23 ms

Our browser made a total of 9 requests to load all elements on the main page. We found that 33% of them (3 requests) were addressed to the original Openzoom.org, 33% (3 requests) were made to D33wubrfki0l68.cloudfront.net and 22% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (89 ms) belongs to the original domain Openzoom.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 35.5 kB (53%)

Content Size

67.0 kB

After Optimization

31.5 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Openzoom.org main page is 67.0 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Javascripts take 46.3 kB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 6.4 kB

  • Original 9.4 kB
  • After minification 7.8 kB
  • After compression 3.0 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 1.6 kB, which is 17% 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 6.4 kB or 68% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 11.4 kB
  • After minification 11.4 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. Open Zoom images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 29.1 kB

  • Original 46.3 kB
  • After minification 46.3 kB
  • After compression 17.1 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 29.1 kB or 63% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

5

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 5 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Open Zoom. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

openzoom.org accessibility score

86

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

Best Practices

openzoom.org 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

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

openzoom.org SEO score

75

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Openzoom.org 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 Openzoom.org 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 Open Zoom. 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: