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

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

tools.niehs.nih.gov

National Institute of Environmental Health Sciences: NIEHS Home page

Page Load Speed

1.4 sec in total

First Response

79 ms

Resources Loaded

528 ms

Page Rendered

829 ms

tools.niehs.nih.gov screenshot

About Website

Click here to check amazing Tools NIEHS Nih content for China. Otherwise, check out these important facts you probably never knew about tools.niehs.nih.gov

National Institute of Environmental Health Sciences | The mission of NIEHS is to discover how the environment affects people in order to promote healthier lives.

Visit tools.niehs.nih.gov

Key Findings

We analyzed Tools.niehs.nih.gov page load time and found that the first response time was 79 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

tools.niehs.nih.gov performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

10/100

10%

LCP (Largest Contentful Paint)

Value15.2 s

0/100

25%

SI (Speed Index)

Value7.3 s

29/100

10%

TBT (Total Blocking Time)

Value1,810 ms

9/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value18.8 s

3/100

10%

Network Requests Diagram

www.niehs.nih.gov

79 ms

css_8F3r7RXi6gjvYDeLh1jcWCqyFBLgBE9YdIuABHcwONM.css

24 ms

css_azOwURoQpBtN6AuXtmq_x7i0rSpsNscp8UnnraISDzU.css

60 ms

css_u1PJOIwCZoDSPrf-im77oJjSZYlmV_fMi5Q2Z3CnXm0.css

69 ms

favicon-57.png

64 ms

Our browser made a total of 62 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Tools.niehs.nih.gov, 15% (9 requests) were made to Fonts.gstatic.com and 6% (4 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (206 ms) relates to the external source Niehs.nih.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 219.7 kB (10%)

Content Size

2.1 MB

After Optimization

1.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Tools.niehs.nih.gov main page is 2.1 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. 75% 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 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 169.9 kB

  • Original 189.0 kB
  • After minification 110.8 kB
  • After compression 19.1 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 78.2 kB, which is 41% 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 169.9 kB or 90% of the original size.

Image Optimization

-3%

Potential reduce by 49.3 kB

  • Original 1.8 MB
  • After minification 1.7 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. Tools NIEHS Nih images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 316 B

  • Original 56.4 kB
  • After minification 56.2 kB
  • After compression 56.0 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 237 B

  • Original 102.6 kB
  • After minification 102.6 kB
  • After compression 102.4 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. Tools.niehs.nih.gov has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 12 (24%)

Requests Now

49

After Optimization

37

  • Images
  • JavaScript
  • CSS

The browser has sent 49 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tools 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 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.niehs.nih.gov

www.niehs.nih.gov

79 ms

css_8F3r7RXi6gjvYDeLh1jcWCqyFBLgBE9YdIuABHcwONM.css

css_8F3r7RXi6gjvYDeLh1jcWCqyFBLgBE9YdIuABHcwONM.css

24 ms

css_azOwURoQpBtN6AuXtmq_x7i0rSpsNscp8UnnraISDzU.css

css_azOwURoQpBtN6AuXtmq_x7i0rSpsNscp8UnnraISDzU.css

60 ms

css_u1PJOIwCZoDSPrf-im77oJjSZYlmV_fMi5Q2Z3CnXm0.css

css_u1PJOIwCZoDSPrf-im77oJjSZYlmV_fMi5Q2Z3CnXm0.css

69 ms

favicon-57.png

favicon-57.png

64 ms

dot-gov.svg

dot-gov.svg

46 ms

icon-https.svg

icon-https.svg

92 ms

niehs-logo.svg

niehs-logo.svg

42 ms

email-decode.min.js

email-decode.min.js

44 ms

js_7G92X3Sc_f8kolJa6VlNVSxb7cgwuH5XWrEl0ZQGoUg.js

js_7G92X3Sc_f8kolJa6VlNVSxb7cgwuH5XWrEl0ZQGoUg.js

80 ms

gtm.js

gtm.js

80 ms

gtag.js

gtag.js

79 ms

js_NQ6kdZV-h7nMu2mvooxNysDuGSVqJm0AU9QNvkRiW08.js

js_NQ6kdZV-h7nMu2mvooxNysDuGSVqJm0AU9QNvkRiW08.js

80 ms

niehs.ewps.js

niehs.ewps.js

98 ms

plastic-pollution-card.jpg

plastic-pollution-card.jpg

88 ms

LoosT24_3000_slider_1200x630_v01.jpg

LoosT24_3000_slider_1200x630_v01.jpg

164 ms

DL_Home_Banner_2024_Slider_1200x630_v01.jpg

DL_Home_Banner_2024_Slider_1200x630_v01.jpg

166 ms

naehsc-card-image.jpg

naehsc-card-image.jpg

165 ms

heat-stress-prevention-slide.jpg

heat-stress-prevention-slide.jpg

117 ms

endocrin-disruptors.jpg

endocrin-disruptors.jpg

163 ms

Directors-newsletter-homepage-DT.jpg

Directors-newsletter-homepage-DT.jpg

164 ms

Factor-newsletter-homepage-DT.jpg

Factor-newsletter-homepage-DT.jpg

163 ms

GEH-newsletter-homepage-DT.jpg

GEH-newsletter-homepage-DT.jpg

167 ms

PEPH-newsletter-homepage-DT.jpg

PEPH-newsletter-homepage-DT.jpg

166 ms

SRP-newsletter-homepage-DT.jpg

SRP-newsletter-homepage-DT.jpg

167 ms

dir.jpg

dir.jpg

186 ms

dert.jpg

dert.jpg

167 ms

dtt.jpg

dtt.jpg

167 ms

strategic_plan_image.jpg

strategic_plan_image.jpg

168 ms

research-initiatives_0.jpg

research-initiatives_0.jpg

196 ms

img_hd869930.png

img_hd869930.png

175 ms

img902252.jpg

img902252.jpg

176 ms

img902254_1.jpg

img902254_1.jpg

196 ms

img_hd958033.jpg

img_hd958033.jpg

195 ms

about-niehs.jpg

about-niehs.jpg

206 ms

clinical-banner.jpg

clinical-banner.jpg

197 ms

css

css

42 ms

css

css

59 ms

css

css

63 ms

css2

css2

65 ms

background-pattern-poly.gif

background-pattern-poly.gif

50 ms

blue-header-two-third.png

blue-header-two-third.png

47 ms

green-header-two-third.png

green-header-two-third.png

47 ms

blue-header-max-width.png

blue-header-max-width.png

48 ms

EHP_Logo_new.png

EHP_Logo_new.png

47 ms

related-site-kids-background.png

related-site-kids-background.png

53 ms

related-site-kids-illustration.png

related-site-kids-illustration.png

61 ms

related-site-NTP.png

related-site-NTP.png

63 ms

footer-graphic.svg

footer-graphic.svg

71 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVc.ttf

17 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVc.ttf

25 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4gaVc.ttf

34 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4gaVc.ttf

36 ms

css_kz4DDCqBcQJVgq38V8ke1aznQymZ87aTTGg4X5ziCxQ.css

css_kz4DDCqBcQJVgq38V8ke1aznQymZ87aTTGg4X5ziCxQ.css

59 ms

fa-solid-900.ttf

fa-solid-900.ttf

37 ms

qFdb35qfgYFjGy5hukqqhw5XeRgdi1rAd6DMGbo.ttf

qFdb35qfgYFjGy5hukqqhw5XeRgdi1rAd6DMGbo.ttf

3 ms

qFdb35qfgYFjGy5hukqqhw5XeRgdi1ryd6DMGbo.ttf

qFdb35qfgYFjGy5hukqqhw5XeRgdi1ryd6DMGbo.ttf

11 ms

qFdb35qfgYFjGy5hukqqhw5XeRgdi1oscKDMGbo.ttf

qFdb35qfgYFjGy5hukqqhw5XeRgdi1oscKDMGbo.ttf

10 ms

qFdb35qfgYFjGy5hukqqhw5XeRgdi1oVcKDMGbo.ttf

qFdb35qfgYFjGy5hukqqhw5XeRgdi1oVcKDMGbo.ttf

11 ms

memQYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWq8tWZ0Pw86hd0Rk8ZkWVAexQ.ttf

memQYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWq8tWZ0Pw86hd0Rk8ZkWVAexQ.ttf

12 ms

fa-regular-400.ttf

fa-regular-400.ttf

29 ms

fa-brands-400-v6_4_2.ttf

fa-brands-400-v6_4_2.ttf

29 ms

Accessibility Review

tools.niehs.nih.gov accessibility score

96

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

button, link, and menuitem elements do not have accessible names.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

tools.niehs.nih.gov 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

tools.niehs.nih.gov SEO score

98

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

High

Tap targets are not sized appropriately

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 Tools.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 Tools.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

tools.niehs.nih.gov

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