Tools & Wizards About Us
kids.niehs.nih.gov screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

kids.niehs.nih.gov

Kids Environment Kids Health - National Institute of Environmental Health Sciences

Page Load Speed

1.4 sec in total

First Response

41 ms

Resources Loaded

718 ms

Page Rendered

670 ms

kids.niehs.nih.gov screenshot

About Website

Visit kids.niehs.nih.gov now to see the best up-to-date Kids Niehs Nih content for China and also check out these interesting facts you probably never knew about kids.niehs.nih.gov

A resource for kids, parents, and teachers to find fun and educational materials related to health, science, and the environment we live in today.

Visit kids.niehs.nih.gov

Key Findings

We analyzed Kids.niehs.nih.gov page load time and found that the first response time was 41 ms and then it took 1.4 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

kids.niehs.nih.gov performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

69/100

10%

LCP (Largest Contentful Paint)

Value18.1 s

0/100

25%

SI (Speed Index)

Value5.7 s

52/100

10%

TBT (Total Blocking Time)

Value2,810 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.019

100/100

15%

TTI (Time to Interactive)

Value14.9 s

8/100

10%

Network Requests Diagram

kids.niehs.nih.gov

41 ms

kids.niehs.nih.gov

85 ms

css_02LqhblDV6v_lf_IVGKHg21yrVeY1-EqOMvXAIQoawA.css

51 ms

css_kLvwumttBUdID-IxmILVEJpKeJrhTkyw-UPJZJLJQZw.css

58 ms

semantic.css

126 ms

Our browser made a total of 122 requests to load all elements on the main page. We found that 96% of them (117 requests) were addressed to the original Kids.niehs.nih.gov, 2% (2 requests) were made to Maxcdn.bootstrapcdn.com and 2% (2 requests) were made to Use.fontawesome.com. The less responsive or slowest element that took the longest time to load (331 ms) belongs to the original domain Kids.niehs.nih.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 146.5 kB (4%)

Content Size

4.0 MB

After Optimization

3.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kids.niehs.nih.gov main page is 4.0 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 3.4 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 92.3 kB

  • Original 107.7 kB
  • After minification 79.4 kB
  • After compression 15.4 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 28.3 kB, which is 26% 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 92.3 kB or 86% of the original size.

Image Optimization

-2%

Potential reduce by 53.2 kB

  • Original 3.4 MB
  • After minification 3.3 MB

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. Kids Niehs Nih images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 24 B

  • Original 502.8 kB
  • After minification 502.8 kB
  • After compression 502.8 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

-1%

Potential reduce by 922 B

  • Original 74.2 kB
  • After minification 74.2 kB
  • After compression 73.3 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. Kids.niehs.nih.gov has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 21 (21%)

Requests Now

101

After Optimization

80

  • Images
  • JavaScript
  • CSS

The browser has sent 101 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kids Niehs Nih. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

kids.niehs.nih.gov

kids.niehs.nih.gov

41 ms

kids.niehs.nih.gov

kids.niehs.nih.gov

85 ms

css_02LqhblDV6v_lf_IVGKHg21yrVeY1-EqOMvXAIQoawA.css

css_02LqhblDV6v_lf_IVGKHg21yrVeY1-EqOMvXAIQoawA.css

51 ms

css_kLvwumttBUdID-IxmILVEJpKeJrhTkyw-UPJZJLJQZw.css

css_kLvwumttBUdID-IxmILVEJpKeJrhTkyw-UPJZJLJQZw.css

58 ms

semantic.css

semantic.css

126 ms

css_TRII6W3arEUkzRNE7F9HCQ9FNRDvRMf2esc5ryPAOeE.css

css_TRII6W3arEUkzRNE7F9HCQ9FNRDvRMf2esc5ryPAOeE.css

68 ms

css_CCe8AlDbP_jQdLVGAbn-m1iOc4CnjMKiaSzw-GQ2omY.css

css_CCe8AlDbP_jQdLVGAbn-m1iOc4CnjMKiaSzw-GQ2omY.css

87 ms

font-awesome.min.css

font-awesome.min.css

88 ms

all.js

all.js

185 ms

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v4-shims.js

219 ms

favicon-57.png

favicon-57.png

85 ms

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js_uxVxp4Yk6N-L55L2ej14ZOswbykhWnaKoBZ08Raj6JY.js

73 ms

gtm.js

gtm.js

73 ms

gtag.js

gtag.js

81 ms

js_3t2dyWDVK7NRGKYxUd4aHihJchR7ZP7a0bSZRhpIUjc.js

js_3t2dyWDVK7NRGKYxUd4aHihJchR7ZP7a0bSZRhpIUjc.js

90 ms

dot-gov.svg

dot-gov.svg

83 ms

icon-https.svg

icon-https.svg

80 ms

logo-niehs-print.gif

logo-niehs-print.gif

85 ms

icon-nav-topics-white.svg

icon-nav-topics-white.svg

93 ms

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96 ms

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94 ms

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100 ms

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icon-nav-bradley%20&%20the%20bad%20pb.svg

153 ms

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156 ms

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191 ms

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159 ms

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193 ms

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195 ms

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188 ms

icon-nav-sharon%20cleans%20up!.svg

icon-nav-sharon%20cleans%20up!.svg

192 ms

icon-nav-sharon%20finds%20the%20environment.svg

icon-nav-sharon%20finds%20the%20environment.svg

312 ms

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icon-nav-the%20lead%20busters%20club.svg

324 ms

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icon-nav-water,%20the%20neverending%20story.svg

320 ms

icon-nav-what%20could%20it%20be,%20beverly

icon-nav-what%20could%20it%20be,%20beverly

319 ms

icon-nav-what's%20wrong%20whiskers

icon-nav-what's%20wrong%20whiskers

322 ms

icon-nav-you%20and%20your%20genes.svg

icon-nav-you%20and%20your%20genes.svg

324 ms

icon-hero-down.svg

icon-hero-down.svg

330 ms

environment_health_homepage_hero_tile.svg

environment_health_homepage_hero_tile.svg

325 ms

songs_homepage_hero_tile.svg

songs_homepage_hero_tile.svg

331 ms

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313 ms

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307 ms

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282 ms

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280 ms

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279 ms

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278 ms

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wildlifebg_0.png

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270 ms

wildlifeimg.png

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273 ms

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280 ms

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277 ms

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277 ms

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271 ms

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272 ms

image1.jpg

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280 ms

vector-accordion-close.svg

vector-accordion-close.svg

270 ms

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215 ms

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213 ms

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214 ms

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213 ms

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213 ms

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185 ms

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183 ms

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184 ms

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181 ms

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183 ms

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115 ms

raleway-semibold.woff

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113 ms

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111 ms

arvo-bold.woff

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107 ms

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116 ms

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106 ms

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102 ms

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99 ms

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100 ms

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98 ms

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96 ms

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97 ms

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be_a_scientist_activity_tile_1.jpg

94 ms

coloring_activity_tile_1.jpg

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99 ms

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99 ms

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95 ms

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97 ms

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97 ms

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102 ms

hhs-logo.png

hhs-logo.png

95 ms

ftr-usagov.png

ftr-usagov.png

89 ms

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logo-niehs-white.svg

88 ms

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92 ms

vector-search.svg

vector-search.svg

91 ms

topics-1-large.jpg

topics-1-large.jpg

88 ms

vector-arrow-circle-right.svg

vector-arrow-circle-right.svg

97 ms

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vector-arrow-circle-left.svg

91 ms

topics-1-small-subtopic-1.jpg

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97 ms

topics-small-molecule.jpg

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87 ms

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96 ms

topics-2-small.jpg

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170 ms

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95 ms

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95 ms

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169 ms

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167 ms

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168 ms

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128 ms

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119 ms

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117 ms

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121 ms

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115 ms

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119 ms

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activities-large-design.jpg

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122 ms

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120 ms

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119 ms

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119 ms

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117 ms

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_landing_page_new_blooms_on_environmental_parkway.jpg

118 ms

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icon-games-filter.svg

119 ms

little-kids-frog.gif

little-kids-frog.gif

117 ms

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117 ms

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18 ms

Accessibility Review

kids.niehs.nih.gov accessibility score

88

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

Links do not have a discernible name

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

kids.niehs.nih.gov best practices score

75

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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

kids.niehs.nih.gov SEO score

93

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

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 Kids.niehs.nih.gov 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 Kids.niehs.nih.gov 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

kids.niehs.nih.gov

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