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impress.js.org screenshot

Report Summary

  • 92

    Performance

    Renders faster than
    92% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

impress.js.org

impress.js | presentation tool based on the power of CSS3 transforms and transitions in modern browsers | by Bartek Szopka @bartaz

Page Load Speed

564 ms in total

First Response

33 ms

Resources Loaded

235 ms

Page Rendered

296 ms

impress.js.org screenshot

About Website

Welcome to impress.js.org homepage info - get ready to check Impress Js best content for United States right away, or after learning these important things about impress.js.org

impress.js is a presentation tool based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com.

Visit impress.js.org

Key Findings

We analyzed Impress.js.org page load time and found that the first response time was 33 ms and then it took 531 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

impress.js.org performance score

92

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.9 s

87/100

10%

LCP (Largest Contentful Paint)

Value3.1 s

76/100

25%

SI (Speed Index)

Value1.9 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.031

100/100

15%

TTI (Time to Interactive)

Value3.1 s

95/100

10%

Network Requests Diagram

impress.js.org

33 ms

impress.js.org

59 ms

css

29 ms

impress-demo.css

30 ms

impress-common.css

40 ms

Our browser made a total of 8 requests to load all elements on the main page. We found that 63% of them (5 requests) were addressed to the original Impress.js.org, 25% (2 requests) were made to Fonts.gstatic.com and 13% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (70 ms) belongs to the original domain Impress.js.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 19.0 kB (92%)

Content Size

20.6 kB

After Optimization

1.6 kB

  • HTML

In fact, the total size of Impress.js.org main page is 20.6 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. HTML takes 20.6 kB which makes up the majority of the site volume.

HTML Optimization

-92%

Potential reduce by 19.0 kB

  • Original 20.6 kB
  • After minification 4.4 kB
  • After compression 1.6 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 16.2 kB, which is 79% 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 19.0 kB or 92% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

6

After Optimization

6

  • AJAX
  • JavaScript
  • CSS

The browser has sent 6 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Impress Js. According to our analytics all requests are already optimized.

Network Requests Diagram

impress.js.org

impress.js.org

33 ms

impress.js.org

impress.js.org

59 ms

css

css

29 ms

impress-demo.css

impress-demo.css

30 ms

impress-common.css

impress-common.css

40 ms

impress.js

impress.js

70 ms

font

font

18 ms

font

font

23 ms

Accessibility Review

impress.js.org accessibility score

75

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.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

impress.js.org best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

SEO Factors

impress.js.org SEO score

100

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

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 Impress.js.org 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 Impress.js.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

impress.js.org

Open Graph description is not detected on the main page of Impress Js. 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: