Tools & Wizards About Us

Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 61% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

scilinks.org

Just a moment...

Page Load Speed

497 ms in total

First Response

29 ms

Resources Loaded

224 ms

Page Rendered

244 ms

About Website

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

SciLinks is an exciting partnership between progressive US textbook publishers and NSTA, the largest organization of science educators in the world. SciLinks ifs FREE to all NSTA members. You and ...

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Key Findings

We analyzed Scilinks.org page load time and found that the first response time was 29 ms and then it took 468 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

scilinks.org performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

35/100

10%

LCP (Largest Contentful Paint)

Value14.2 s

0/100

25%

SI (Speed Index)

Value7.1 s

31/100

10%

TBT (Total Blocking Time)

Value780 ms

38/100

30%

CLS (Cumulative Layout Shift)

Value0.107

88/100

15%

TTI (Time to Interactive)

Value18.5 s

3/100

10%

Network Requests Diagram

www.scilinks.org

29 ms

GlobalSite.css

51 ms

Global.js

24 ms

jquery-1.3.1.min.js

28 ms

jquery.tablesorter.mod.js

27 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 95% of them (37 requests) were addressed to the original Scilinks.org, 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (77 ms) belongs to the original domain Scilinks.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 298.5 kB (38%)

Content Size

790.1 kB

After Optimization

491.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Scilinks.org main page is 790.1 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. 25% of websites need less resources to load. Images take 405.4 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 16.7 kB

  • Original 22.1 kB
  • After minification 18.5 kB
  • After compression 5.5 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 3.6 kB, which is 16% 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 16.7 kB or 75% of the original size.

Image Optimization

-4%

Potential reduce by 15.1 kB

  • Original 405.4 kB
  • After minification 390.3 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. Scilinks images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 217.3 kB

  • Original 305.3 kB
  • After minification 281.8 kB
  • After compression 88.0 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 217.3 kB or 71% of the original size.

CSS Optimization

-86%

Potential reduce by 49.4 kB

  • Original 57.2 kB
  • After minification 42.8 kB
  • After compression 7.8 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. Scilinks.org needs all CSS files to be minified and compressed as it can save up to 49.4 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (53%)

Requests Now

38

After Optimization

18

  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Scilinks. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

scilinks.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.

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

scilinks.org best practices score

67

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

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

scilinks.org SEO score

77

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

High

Image elements do not have [alt] attributes

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Scilinks.org can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Scilinks.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 Scilinks. 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: