Tools & Wizards About Us

Report Summary

  • 49

    Performance

    Renders faster than
    67% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

sealevel-nexus.jpl.nasa.gov

JPL | Sea Level Change Portal Statistics Services

Page Load Speed

1.8 sec in total

First Response

240 ms

Resources Loaded

1.4 sec

Page Rendered

178 ms

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 240 ms and then it took 1.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

sealevel-nexus.jpl.nasa.gov performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.2 s

0/100

10%

LCP (Largest Contentful Paint)

Value11.0 s

0/100

25%

SI (Speed Index)

Value8.3 s

19/100

10%

TBT (Total Blocking Time)

Value60 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value10.2 s

25/100

10%

Network Requests Diagram

sealevel-nexus.jpl.nasa.gov

240 ms

sealevel-nexus.jpl.nasa.gov

351 ms

manifest.css

404 ms

toolspecific.css

202 ms

jquery.fancybox.css

335 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that 91% of them (20 requests) were addressed to the original Sealevel-nexus.jpl.nasa.gov, 5% (1 request) were made to Dap.digitalgov.gov and 5% (1 request) were made to S7.addthis.com. The less responsive or slowest element that took the longest time to load (544 ms) belongs to the original domain Sealevel-nexus.jpl.nasa.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.2 MB (66%)

Content Size

1.9 MB

After Optimization

640.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sealevel-nexus.jpl.nasa.gov main page is 1.9 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. 45% of websites need less resources to load. Javascripts take 744.9 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 357.7 kB

  • Original 439.1 kB
  • After minification 427.8 kB
  • After compression 81.4 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. 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 357.7 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

-70%

Potential reduce by 519.6 kB

  • Original 744.9 kB
  • After minification 711.9 kB
  • After compression 225.3 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 519.6 kB or 70% 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 12 (60%)

Requests Now

20

After Optimization

8

  • Images
  • JavaScript
  • CSS

The browser has sent 20 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 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

Accessibility Review

sealevel-nexus.jpl.nasa.gov accessibility score

85

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

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

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

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

sealevel-nexus.jpl.nasa.gov SEO score

69

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

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 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

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: