Tools & Wizards About Us

Report Summary

  • 23

    Performance

    Renders faster than
    41% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

zearn.org

Zearn Math | Top-rated Math Learning Platform

Page Load Speed

605 ms in total

First Response

81 ms

Resources Loaded

470 ms

Page Rendered

54 ms

About Website

Visit zearn.org now to see the best up-to-date Zearn content for United States and also check out these interesting facts you probably never knew about zearn.org

Learning with Zearn helps math make sense. Students explore math through pictures, visual models, and real-life examples. Log in to your Zearn account.

Visit zearn.org

Key Findings

We analyzed Zearn.org page load time and found that the first response time was 81 ms and then it took 524 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

zearn.org performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value10.3 s

0/100

10%

LCP (Largest Contentful Paint)

Value11.5 s

0/100

25%

SI (Speed Index)

Value10.3 s

8/100

10%

TBT (Total Blocking Time)

Value1,180 ms

21/100

30%

CLS (Cumulative Layout Shift)

Value0.043

99/100

15%

TTI (Time to Interactive)

Value13.5 s

11/100

10%

Network Requests Diagram

zearn.org

81 ms

www.zearn.org

33 ms

rudder-analytics.min.js

114 ms

application-6d13a4899296fd231246117f978d172eaf238b85f0cf770063c5c84a6d2e2b22.css

55 ms

includes-0cefd422a45b081c065a53754fe114e1984e029503ec15601db3db18f826cac7.js

115 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 7% of them (2 requests) were addressed to the original Zearn.org, 75% (21 requests) were made to D33atdio81inpg.cloudfront.net and 11% (3 requests) were made to Webassets.zearn.org. The less responsive or slowest element that took the longest time to load (254 ms) relates to the external source Webassets.zearn.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 143.9 kB (14%)

Content Size

1.0 MB

After Optimization

895.2 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Zearn.org main page is 1.0 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. 30% of websites need less resources to load. Javascripts take 727.9 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 13.5 kB

  • Original 17.8 kB
  • After minification 17.4 kB
  • After compression 4.3 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 13.5 kB or 76% of the original size.

JavaScript Optimization

-0%

Potential reduce by 36 B

  • Original 727.9 kB
  • After minification 727.9 kB
  • After compression 727.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-44%

Potential reduce by 130.4 kB

  • Original 293.4 kB
  • After minification 293.3 kB
  • After compression 163.0 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. Zearn.org needs all CSS files to be minified and compressed as it can save up to 130.4 kB or 44% of the original size.

Requests Breakdown

Number of requests can be reduced by 23 (88%)

Requests Now

26

After Optimization

3

  • AJAX
  • JavaScript
  • CSS

The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zearn. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 20 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

zearn.org accessibility score

89

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

Buttons do not have an accessible name

Best Practices

zearn.org best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

zearn.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

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zearn.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 Zearn.org main page’s claimed encoding is . 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 data is detected on the main page of Zearn. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: