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sealevel-nexus.jpl.nasa.gov screenshot

Report Summary

  • 48

    Performance

    Renders faster than
    67% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

sealevel-nexus.jpl.nasa.gov

JPL | Sea Level Change Portal Statistics Services

Page Load Speed

2.9 sec in total

First Response

343 ms

Resources Loaded

2.2 sec

Page Rendered

283 ms

sealevel-nexus.jpl.nasa.gov screenshot

About Website

Visit sealevel-nexus.jpl.nasa.gov now to see the best up-to-date Sea Level Nexus JPL Nasa content for United States and also check out these interesting facts you probably never knew about sealevel-nexus.jpl.nasa.gov

Visit sealevel-nexus.jpl.nasa.gov

Key Findings

We analyzed Sealevel-nexus.jpl.nasa.gov page load time and found that the first response time was 343 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

sealevel-nexus.jpl.nasa.gov performance score

48

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

81/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

27/100

25%

SI (Speed Index)

Value2.4 s

98/100

10%

TBT (Total Blocking Time)

Value2,810 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.5 s

71/100

10%

Network Requests Diagram

sealevel-nexus.jpl.nasa.gov

343 ms

sealevel-nexus.jpl.nasa.gov

421 ms

manifest.css

473 ms

toolspecific.css

238 ms

jquery.fancybox.css

371 ms

Our browser made a total of 21 requests to load all elements on the main page. We found that 95% of them (20 requests) were addressed to the original Sealevel-nexus.jpl.nasa.gov, 5% (1 request) were made to S7.addthis.com. The less responsive or slowest element that took the longest time to load (646 ms) belongs to the original domain Sealevel-nexus.jpl.nasa.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 883.2 kB (64%)

Content Size

1.4 MB

After Optimization

493.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sealevel-nexus.jpl.nasa.gov main page is 1.4 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. 25% of websites need less resources to load. HTML takes 438.9 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 357.6 kB

  • Original 438.9 kB
  • After minification 427.6 kB
  • After compression 81.3 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 357.6 kB or 81% of the original size.

Image Optimization

-6%

Potential reduce by 16.4 kB

  • Original 289.2 kB
  • After minification 272.8 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. Sea Level Nexus JPL Nasa images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 161.1 kB

  • Original 239.2 kB
  • After minification 206.3 kB
  • After compression 78.1 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 161.1 kB or 67% of the original size.

CSS Optimization

-85%

Potential reduce by 348.0 kB

  • Original 408.8 kB
  • After minification 195.1 kB
  • After compression 60.8 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. Sealevel-nexus.jpl.nasa.gov needs all CSS files to be minified and compressed as it can save up to 348.0 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (58%)

Requests Now

19

After Optimization

8

  • Images
  • JavaScript
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sea Level Nexus JPL Nasa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

sealevel-nexus.jpl.nasa.gov

sealevel-nexus.jpl.nasa.gov

343 ms

sealevel-nexus.jpl.nasa.gov

sealevel-nexus.jpl.nasa.gov

421 ms

manifest.css

manifest.css

473 ms

toolspecific.css

toolspecific.css

238 ms

jquery.fancybox.css

jquery.fancybox.css

371 ms

public_manifest.js

public_manifest.js

646 ms

not_ie8_manifest.js

not_ie8_manifest.js

452 ms

jquery.fancybox.js

jquery.fancybox.js

382 ms

mb_manifest.js

mb_manifest.js

381 ms

addthis_widget.js

addthis_widget.js

42 ms

manifest.css

manifest.css

258 ms

toolspecific.css

toolspecific.css

117 ms

jquery.fancybox.css

jquery.fancybox.css

219 ms

print.css

print.css

129 ms

logo_nasa_trio_white@2x.png

logo_nasa_trio_white@2x.png

203 ms

logo_nasa_trio_black@2x.png

logo_nasa_trio_black@2x.png

204 ms

menu_button_jpl@2x.png

menu_button_jpl@2x.png

124 ms

social_media_sprite.png

social_media_sprite.png

125 ms

1_1_DAT_2.jpg

1_1_DAT_2.jpg

387 ms

envelope.png

envelope.png

201 ms

print.css

print.css

69 ms

Accessibility Review

sealevel-nexus.jpl.nasa.gov accessibility score

92

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

sealevel-nexus.jpl.nasa.gov best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

sealevel-nexus.jpl.nasa.gov SEO score

75

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 Sealevel-nexus.jpl.nasa.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 Sealevel-nexus.jpl.nasa.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

sealevel-nexus.jpl.nasa.gov

Open Graph description is not detected on the main page of Sea Level Nexus JPL Nasa. 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: