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6 nasa.gov Last Updated: 1 week

Success 47% of passed verification steps
Warning 30% of total warning
Errors 23% of total errors, require fast action

Desktop

Mobile

Performance Desktop Score 34%
Best Practices Desktop Score 92%
SEO Desktop Score 83%
PWA Desktop Score 33%
Performance Mobile Score 27%
Best Practices Mobile Score 92%
SEO Mobile Score 83%
PWA Mobile Score 40%
Page Authority Authority 0%
Domain Authority Domain Authority 0%
Moz Rank 0.0/10
Bounce Rate Rate 0%
Charset Encoding
Great, language/character encoding is specified: UTF-8
Title Tag 4 Characters
NASA
Meta Description 179 Characters
NASA.gov brings you the latest news, images and videos from America's space agency, pioneering the future in space exploration, scientific discovery and aeronautics research.
Effective URL 20 Characters
https://www.nasa.gov
Google Preview Your look like this in google search result
NASA
https://www.nasa.gov
NASA.gov brings you the latest news, images and videos from America's space agency, pioneering the future in space exploration, scientific discov
Robots.txt File Detected
Sitemap.xml File Detected
Whois Is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system
Updated: 1970-01-01 / 53 years
Create on: 1970-01-01 / 53 years
Expires on: 1970-01-01 / 646 months 11 days
Page Size Code & Text Ratio
Document Size: ~9.93 KB
Code Size: ~4.85 KB
Text Size: ~5.08 KB Ratio: 51.14%

Technologies

PWA - Manifest

Manifest is not valid
Your site don't have valid manifest.json, read more in Web App Manifest

Desktop

Desktop Screenshot
Avoids an excessive DOM size 310 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Max Potential First Input Delay 210 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
Minify CSS Potential savings of 92 KiB
Minifying CSS files can reduce network payload sizes
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Minimize third-party usage Third-party code blocked the main thread for 0 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Reduce unused CSS Potential savings of 483 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Minimizes main-thread work 1.2 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Avoid large layout shifts 5 elements found
These DOM elements contribute most to the CLS of the page.
JavaScript execution time 0.8 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Total Blocking Time 180 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
Serve static assets with an efficient cache policy 39 resources found
A long cache lifetime can speed up repeat visits to your page
Serve images in next-gen formats Potential savings of 443 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
Reduce unused JavaScript Potential savings of 4,641 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity
Cumulative Layout Shift 0.276
Cumulative Layout Shift measures the movement of visible elements within the viewport
First Meaningful Paint 6.7 s
First Meaningful Paint measures when the primary content of a page is visible
Avoid enormous network payloads Total size was 8,016 KiB
Large network payloads cost users real money and are highly correlated with long load times
Largest Contentful Paint element 1 element found
This is the largest contentful element painted within the viewport
Avoid long main-thread tasks 5 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
Includes front-end JavaScript libraries with known security vulnerabilities 1 vulnerability detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Largest Contentful Paint 7.6 s
Largest Contentful Paint marks the time at which the largest text or image is painted
Keep request counts low and transfer sizes small 74 requests • 8,016 KiB
To set budgets for the quantity and size of page resources, add a budget.json file
Initial server response time was short Root document took 110 ms
Keep the server response time for the main document short because all other requests depend on it
Web app manifest or service worker do not meet the installability requirements 1 reason
Service worker is the technology that enables your app to use many Progressive Web App features, such as offline, add to homescreen, and push notifications. With proper service worker and manifest implementations, browsers can proactively prompt users to add your app to their homescreen, which can lead to higher engagement
Enable text compression Potential savings of 4,833 KiB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Avoid chaining critical requests 16 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
First Contentful Paint 6.4 s
First Contentful Paint marks the time at which the first text or image is painted
Avoid serving legacy JavaScript to modern browsers Potential savings of 42 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers
User Timing marks and measures 1 user timing
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Speed Index 6.4 s
Speed Index shows how quickly the contents of a page are visibly populated
Eliminate render-blocking resources Potential savings of 6,110 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Efficiently encode images Potential savings of 161 KiB
Optimized images load faster and consume less cellular data
Time to Interactive 7.2 s
Time to interactive is the amount of time it takes for the page to become fully interactive

Mobile

Mobile Screenshot
Cumulative Layout Shift 0.123
Cumulative Layout Shift measures the movement of visible elements within the viewport
Avoid enormous network payloads Total size was 7,829 KiB
Large network payloads cost users real money and are highly correlated with long load times
Minimize third-party usage Third-party code blocked the main thread for 70 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Largest Contentful Paint element 1 element found
This is the largest contentful element painted within the viewport
Avoid large layout shifts 3 elements found
These DOM elements contribute most to the CLS of the page.
Minify CSS Potential savings of 92 KiB
Minifying CSS files can reduce network payload sizes
Avoid long main-thread tasks 11 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
Efficiently encode images Potential savings of 142 KiB
Optimized images load faster and consume less cellular data
Largest Contentful Paint 41.0 s
Largest Contentful Paint marks the time at which the largest text or image is painted
Includes front-end JavaScript libraries with known security vulnerabilities 1 vulnerability detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Keep request counts low and transfer sizes small 72 requests • 7,829 KiB
To set budgets for the quantity and size of page resources, add a budget.json file
Serve images in next-gen formats Potential savings of 368 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
Reduce unused JavaScript Potential savings of 4,641 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity
Initial server response time was short Root document took 40 ms
Keep the server response time for the main document short because all other requests depend on it
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Avoid chaining critical requests 16 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Avoid serving legacy JavaScript to modern browsers Potential savings of 42 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers
Max Potential First Input Delay 330 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
Minimize main-thread work 3.8 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Eliminate render-blocking resources Potential savings of 35,910 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
First Contentful Paint (3G) 84244 ms
First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network
Serve static assets with an efficient cache policy 38 resources found
A long cache lifetime can speed up repeat visits to your page
Tap targets are not sized appropriately 71% appropriately sized tap targets
Interactive elements like buttons and links should be large enough (48x48px), and have enough space around them, to be easy enough to tap without overlapping onto other elements
First Contentful Paint 37.0 s
First Contentful Paint marks the time at which the first text or image is painted
Total Blocking Time 600 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
Defer offscreen images Potential savings of 91 KiB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive
First Meaningful Paint 37.2 s
First Meaningful Paint measures when the primary content of a page is visible
User Timing marks and measures 1 user timing
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Reduce unused CSS Potential savings of 488 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity
Avoids an excessive DOM size 310 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Document uses legible font sizes 100% legible text
Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px
Time to Interactive 42.1 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Reduce JavaScript execution time 2.7 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Enable text compression Potential savings of 4,833 KiB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Speed Index 37.0 s
Speed Index shows how quickly the contents of a page are visibly populated
Web app manifest or service worker do not meet the installability requirements 1 reason
Service worker is the technology that enables your app to use many Progressive Web App features, such as offline, add to homescreen, and push notifications. With proper service worker and manifest implementations, browsers can proactively prompt users to add your app to their homescreen, which can lead to higher engagement

Speed And Optimization Tips

Website speed has a huge impact on performance, affecting user experience, conversion rates and even rankings. ‪‬‬By reducing page load-times, users are less likely to get distracted and the search engines are more likely to reward you by ranking you
Title Website
Warning! Your title is not optimized
Description Website
Warning! Your description is not optimized
Robots.txt
Congratulations! Your site have a robots.txt file
Sitemap.xml
Congratulations! We've found a sitemap file for your website
SSL Secure
Congratulations! Your site have Support to HTTPS
Headings
Warning! Your page not contain any H1 and H2 headings. H1 and H2 headings help indicate the important topics of your page to search engines
Blacklist
Congratulations! Your site is not listed in a blacklist
W3C Validator
Warning! Your site have errors W3C
Accelerated Mobile Pages (AMP)
Warning! Your site not have AMP Version
Domain Authority
Warning! Domain Authority of your website is slow. It is good to have domain authority more than 25.
GZIP Compress
Warning! Your site not is compressed, this can make slower response for the visitors
Favicon
Congratulations! Your website appears to have a favicon.
Broken Links
Congratulations! You not have broken links View links

Domain Available

Domain (TDL) and Typo Status
nasa.co Already Registered
nasa.us Already Registered
nasa.com Already Registered
nasa.org Already Registered
nasa.net Already Registered
nsa.gov Already Registered
hasa.gov Available Buy Now!
uasa.gov Available Buy Now!

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server
HTTP/2 200 
content-type: text/html
content-length: 10166
x-amz-id-2: 9Lbd25TKwR8WlauFW4MQE3pESLhr1z4GTn+9lDnarqyn4xo3t4ySgrowNQymiVsrNyde1eReL2k=
x-amz-request-id: QARGCEDFMPSMPPQW
x-amz-replication-status: PENDING
last-modified: Wed, 25 Jan 2023 18:48:47 GMT
x-amz-server-side-encryption: AES256
x-amz-meta-md5_hash: c7fe869815ba87b73848b4a4e3d9f522
x-amz-version-id: kIBp2ZIVNFYfpdIQHBw_Kf3fKiAcHDqo
accept-ranges: bytes
server: AmazonS3
x-ua-compatible: IE=edge,chrome=1
date: Wed, 25 Jan 2023 18:53:55 GMT
cache-control: max-age=300
etag: "c7fe869815ba87b73848b4a4e3d9f522"
referrer-policy: strict-origin
x-content-type-options: nosniff
strict-transport-security: max-age=31557600; includeSubdomains; preload
content-security-policy: frame-ancestors 'self' https://*.nasa.gov
x-cache: Hit from cloudfront
via: 1.1 fb49d852ca52c03c834ce98098b51516.cloudfront.net (CloudFront)
x-amz-cf-pop: FRA56-P5
x-amz-cf-id: c9UyB2wEgFuu4jNmcyFDdttYzQUru3LXjoIlE_dUPHCoRXUh61qyNA==
age: 238
IP Server The IP Address from server
IP Details Information for IP address
City: Ashburn
Country: USA
Region: Virginia
ISP:
DNS Records DNS Resource Records associated with a hostname
View DNS Records