Tools & Wizards About Us
excelschools.net screenshot

Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 89% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 67

    SEO

    Google-friendlier than
    25% of websites

excelschools.net

PhET: Free online physics, chemistry, biology, earth science and math simulations

Page Load Speed

275 ms in total

First Response

66 ms

Resources Loaded

79 ms

Page Rendered

130 ms

excelschools.net screenshot

About Website

Welcome to excelschools.net homepage info - get ready to check Excelschools best content right away, or after learning these important things about excelschools.net

Free science and math simulations for teaching STEM topics, including physics, chemistry, biology, and math, from University of Colorado Boulder

Visit excelschools.net

Key Findings

We analyzed Excelschools.net page load time and found that the first response time was 66 ms and then it took 209 ms to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

excelschools.net performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.9 s

100/100

10%

LCP (Largest Contentful Paint)

Value0.9 s

100/100

25%

SI (Speed Index)

Value0.9 s

100/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value0.9 s

100/100

10%

Network Requests Diagram

excelschools.net

66 ms

Our browser made a total of 1 request to load all elements on the main page. We found that all of those requests were addressed to Excelschools.net and no external sources were called. The less responsive or slowest element that took the longest time to load (66 ms) belongs to the original domain Excelschools.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 95.4 kB (12%)

Content Size

813.2 kB

After Optimization

717.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Excelschools.net main page is 813.2 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. Images take 715.8 kB which makes up the majority of the site volume.

HTML Optimization

-53%

Potential reduce by 19.1 kB

  • Original 36.3 kB
  • After minification 35.2 kB
  • After compression 17.2 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 19.1 kB or 53% of the original size.

Image Optimization

-10%

Potential reduce by 75.0 kB

  • Original 715.8 kB
  • After minification 640.8 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. Excelschools images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 912 B

  • Original 42.3 kB
  • After minification 42.3 kB
  • After compression 41.4 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

-2%

Potential reduce by 347 B

  • Original 18.7 kB
  • After minification 18.7 kB
  • After compression 18.3 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. Excelschools.net has all CSS files already compressed.

Requests Breakdown

We found no issues to fix!

Requests Now

0

After Optimization

0

Besides the initial HTML request, no CSS, Javascripts, AJAX or image files were requested in the course of web page rendering.

Network Requests Diagram

excelschools.net

excelschools.net

66 ms

Accessibility Review

excelschools.net accessibility score

96

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

Best Practices

excelschools.net best practices score

83

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

SEO Factors

excelschools.net SEO score

67

Search Engine Optimization Advices

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 Excelschools.net 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 Excelschools.net 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

excelschools.net

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