Tools & Wizards About Us
21pstem.org screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 92% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

21pstem.org

21PSTEM | 21st Century Partnership for STEM Education | Conshohocken PA

Page Load Speed

1.5 sec in total

First Response

41 ms

Resources Loaded

1.4 sec

Page Rendered

62 ms

21pstem.org screenshot

About Website

Visit 21pstem.org now to see the best up-to-date 21PSTEM content and also check out these interesting facts you probably never knew about 21pstem.org

The 21st Century Partnership for STEM Education is a nonprofit organization based in Conshohocken, PA that works both nationally and internationally with governments, institutions of higher education,...

Visit 21pstem.org

Key Findings

We analyzed 21pstem.org page load time and found that the first response time was 41 ms and then it took 1.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

21pstem.org performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

55/100

10%

LCP (Largest Contentful Paint)

Value8.9 s

1/100

25%

SI (Speed Index)

Value8.5 s

18/100

10%

TBT (Total Blocking Time)

Value270 ms

82/100

30%

CLS (Cumulative Layout Shift)

Value0.051

99/100

15%

TTI (Time to Interactive)

Value10.1 s

26/100

10%

Network Requests Diagram

www.21pstem.org

41 ms

minified.js

35 ms

focus-within-polyfill.js

34 ms

polyfill.min.js

28 ms

thunderbolt-commons.7700cd07.bundle.min.js

145 ms

Our browser made a total of 49 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original 21pstem.org, 37% (18 requests) were made to Static.parastorage.com and 31% (15 requests) were made to Static.wixstatic.com. The less responsive or slowest element that took the longest time to load (638 ms) relates to the external source Static.wixstatic.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 525.8 kB (53%)

Content Size

991.8 kB

After Optimization

466.0 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of 21pstem.org main page is 991.8 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 45% of websites need less resources to load. HTML takes 533.0 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 419.8 kB

  • Original 533.0 kB
  • After minification 531.2 kB
  • After compression 113.2 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 419.8 kB or 79% of the original size.

Image Optimization

-37%

Potential reduce by 57.8 kB

  • Original 155.2 kB
  • After minification 97.4 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. Obviously, 21PSTEM needs image optimization as it can save up to 57.8 kB or 37% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-16%

Potential reduce by 48.1 kB

  • Original 303.5 kB
  • After minification 303.5 kB
  • After compression 255.4 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 48.1 kB or 16% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (33%)

Requests Now

30

After Optimization

20

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 21PSTEM. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

www.21pstem.org

www.21pstem.org

41 ms

minified.js

minified.js

35 ms

focus-within-polyfill.js

focus-within-polyfill.js

34 ms

polyfill.min.js

polyfill.min.js

28 ms

thunderbolt-commons.7700cd07.bundle.min.js

thunderbolt-commons.7700cd07.bundle.min.js

145 ms

main.16c08821.bundle.min.js

main.16c08821.bundle.min.js

161 ms

main.renderer.1d21f023.bundle.min.js

main.renderer.1d21f023.bundle.min.js

26 ms

lodash.min.js

lodash.min.js

145 ms

react.production.min.js

react.production.min.js

146 ms

react-dom.production.min.js

react-dom.production.min.js

146 ms

siteTags.bundle.min.js

siteTags.bundle.min.js

145 ms

21PSTEM_2color_p626_var_4_edited.jpg

21PSTEM_2color_p626_var_4_edited.jpg

98 ms

bundle.min.js

bundle.min.js

71 ms

bf6da2_0034dd572d834541ba709aacf17b187d~mv2.jpg

bf6da2_0034dd572d834541ba709aacf17b187d~mv2.jpg

409 ms

21PSTEM_2color_p626_var_4_edited.jpg

21PSTEM_2color_p626_var_4_edited.jpg

322 ms

bf6da2_4b9554345c0041e4b65cbfc86cfdc730~mv2.png

bf6da2_4b9554345c0041e4b65cbfc86cfdc730~mv2.png

250 ms

Horizontal_RGB_294.png

Horizontal_RGB_294.png

194 ms

bf6da2_08132683bc154d71bea81593167fca09~mv2.png

bf6da2_08132683bc154d71bea81593167fca09~mv2.png

249 ms

bf6da2_09cb44a4be9e4bc8bb6f24c6b3bffa98~mv2.jpg

bf6da2_09cb44a4be9e4bc8bb6f24c6b3bffa98~mv2.jpg

191 ms

bf6da2_2f7c6fd8e0ca440ca71619bbd5a11e6d~mv2.png

bf6da2_2f7c6fd8e0ca440ca71619bbd5a11e6d~mv2.png

343 ms

bf6da2_b5b552f671fd473eb2774f107d294c8c~mv2.png

bf6da2_b5b552f671fd473eb2774f107d294c8c~mv2.png

396 ms

bf6da2_e34bd641d4574d8fa59cd72713e875ab~mv2.png

bf6da2_e34bd641d4574d8fa59cd72713e875ab~mv2.png

399 ms

bf6da2_b241ad08143d4dc1a991cca406c58a86~mv2.jpg

bf6da2_b241ad08143d4dc1a991cca406c58a86~mv2.jpg

458 ms

bf6da2_dc1c304d8cd64bf383611d5a3a9f5abd~mv2.png

bf6da2_dc1c304d8cd64bf383611d5a3a9f5abd~mv2.png

507 ms

bf6da2_12535906ecb3444e9b8eb8a2b1e0dad2~mv2.png

bf6da2_12535906ecb3444e9b8eb8a2b1e0dad2~mv2.png

523 ms

bf6da2_139f504d585c4279b504528f2cdf3ab6~mv2.png

bf6da2_139f504d585c4279b504528f2cdf3ab6~mv2.png

638 ms

bf6da2_1da80652a87c42b7a7d8ded95dff2f4f~mv2.png

bf6da2_1da80652a87c42b7a7d8ded95dff2f4f~mv2.png

567 ms

132 ms

144 ms

135 ms

140 ms

140 ms

139 ms

177 ms

174 ms

181 ms

176 ms

175 ms

174 ms

908c4810-64db-4b46-bb8e-823eb41f68c0.woff

908c4810-64db-4b46-bb8e-823eb41f68c0.woff

9 ms

WmVKXVcOuffP_qmCpFuyzRsxEYwM7FgeyaSgU71cLG0.woff

WmVKXVcOuffP_qmCpFuyzRsxEYwM7FgeyaSgU71cLG0.woff

18 ms

STBOO2waD2LpX45SXYjQBRsxEYwM7FgeyaSgU71cLG0.woff

STBOO2waD2LpX45SXYjQBRsxEYwM7FgeyaSgU71cLG0.woff

19 ms

deprecation-en.v5.html

deprecation-en.v5.html

6 ms

bolt-performance

bolt-performance

24 ms

deprecation-style.v5.css

deprecation-style.v5.css

7 ms

right-arrow.svg

right-arrow.svg

20 ms

WixMadeforDisplay_W_Bd.woff

WixMadeforDisplay_W_Bd.woff

6 ms

WixMadeforText_W_Bd.woff

WixMadeforText_W_Bd.woff

5 ms

WixMadeforText_W_Rg.woff

WixMadeforText_W_Rg.woff

5 ms

Accessibility Review

21pstem.org accessibility score

97

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

21pstem.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

21pstem.org SEO score

86

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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 21pstem.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 21pstem.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

21pstem.org

Open Graph data is detected on the main page of 21PSTEM. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: