Nsf.gov - SEO Checker

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Overview of the SEO Check
Meta information
100% 
Page quality
65% 
Page structure
100% 
Link structure
93% 
Server
89% 
External factors
100% 
SEO Score
Response time
0.64 s
File size
78.80 kB
Words
633
Media files
33
Number of links
108 internal / 20 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
NSF - National Science Foundation
The length of the page title is perfect. (314 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.
The length of the meta description is perfect. (690 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.nsf.gov/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
descriptionNSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.
GeneratorDrupal 10 (https://www.drupal.org)
MobileOptimizedwidth
HandheldFriendlytrue
viewportwidth=device-width, initial-scale=1.0
langen
twitter:cardsummary_large_image
twitter:site@NSF
twitter:titleNSF - National Science Foundation
twitter:imagehttps://www.nsf.gov/themes/custom/nsf_theme/logo-200x200.png
twitter:image:altEmpty
og:site_nameNSF - National Science Foundation
og:typewebsite
og:urlhttps://www.nsf.gov/
og:titleNSF - National Science Foundation
og:descriptionNSF's mission is to advance the progress of science, a mission accomplished by funding proposals for research and education made by scientists, engineers, and educators from across the country.
og:imagehttps://www.nsf.gov/themes/custom/nsf_theme/logo-200x200.png
og:image:altEmpty
charsetutf-8

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
Words from the H1 heading are not used in the page content.
The average number of words per sentence of 5.64 words is low.
This page contains 633 words. That's ok.
25.9% of the text are stop words.
The page contains a listing, which indicates a good text layout.
3 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1.0" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 13 tags for this page.
Image SEO
(Somewhat important)
5 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
...plugins/uswds/dist/img/us_flag_small.pngNo alt attribute provided
.../plugins/uswds/dist/img/icon-dot-gov.svgNo alt attribute provided
...me/plugins/uswds/dist/img/icon-https.svgNo alt attribute provided
...mponents/molecules/logo/logo-desktop.pngNSF - National Science Foundation - Home
...ponents/molecules/logo/logo-wordmark.svgNo alt attribute provided
...heme/images/icons/close-base-darkest.svgClose navigation
...iqAcU_Y7fajEI4J0FkhFd0awzK&itok=UTVuKwPlA researcher uses an inverted fluorescence microscope to image cancer cells
...rsionId=HylRMtQUwYTocn.ynz_bb1JwVcb_zMS6Find & apply for funding
...rsionId=q4NtPRyc73_9J3MfkWUtFk_iMPv1.28pExplore NSF discoveries
...rsionId=F0KF45BlLkZPFElgJ9JMCcJYc0SWMJE7Our focus areas
...rsionId=cXdN23Fa8255PdAWeJDTOw9UsjJdIQ5tWhat we've funded
...vonq.Oh.KTu0fIALHJHIJc1.38&itok=no2I6Yb8Illustration of a protein surrounding a section of a DNA molecule
..._NWVoPnN33_cbtNkhwJlfi3XFA&itok=wwhS4mpoA close-up of a hand holding a smartphone displaying various data graphs and charts.
...ZnGa2pE6sQ8BwFZHPQVNqI0ZBE&itok=hFWj7CZpA laser table in a dark lab with red laser light visible and optical equipment.
...HorU0RrW2zj9.3bnKagUomL6m0&itok=u5X00jsBteacher testing their AI model
...f_iconset/facebook-icon_square_32x32.pngFacebook
...sf_iconset/twitter-icon_square_32x32.pngTwitter
..._iconset/instagram-icon_square_32x32.pngInstagram
...sf_iconset/youtube-icon_square_32x32.pngYouTube
...f_iconset/linkedin-icon_square_32x32.pngLinkedIn
...nsf_iconset/nsfrss-icon_square_32x32.pngRSS
...zsmHjmobzVm8WC6cQIKiYHZL4j&itok=nFelWZfcTurbulent mixing of a magnetized plasma
...zt_LYtsWDv4tmb0L0IkqOj&itok=Pu6Nqd8oPromote discovery in science & engineering
...1cC7udG6GdnbJXB3Gmno65&itok=zQ1IzOTpAccelerate technology & innovation
...HxGmEhwnegxtXdT958zn8R&itok=gFUAchP8Create a STEM workforce
...mponents/molecules/logo/logo-desktop.pngNSF - National Science Foundation - Home
.../molecules/logo/logo-wordmark--white.svgNo alt attribute provided
...f_iconset/facebook-icon_square_32x32.pngFacebook
...sf_iconset/twitter-icon_square_32x32.pngTwitter
..._iconset/instagram-icon_square_32x32.pngInstagram
...sf_iconset/youtube-icon_square_32x32.pngYouTube
...f_iconset/linkedin-icon_square_32x32.pngLinkedIn
...nsf_iconset/nsfrss-icon_square_32x32.pngRSS

Page structure

H1 heading
(Critically important)
Innovation Anywhere, Opportunity Everywhere
The H1 heading is perfect.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Innovation Anywhere, Opportunity Everywhere
H2 What's new
H2 CRISPR: A biotech breakthrough
H2 Get the latest news on topics you choose, right in your inbox.
H2 Our priorities
H2 NSF by the numbers
H2 Footer
H2 Required Policy Links
H3 Pocket-sized progress: Smartphones and NSF innovations
H3 Now on factory floors: Ultra-precise chip etching technology enabled by NSF-funded plasma science
H3 Preparing science educators to use and teach AI in the classroom
H3 About Us
H3 What's New
H3 Information For
H3 Resources
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 20 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.nsf.gov/Anchor Skip to main content
/updates-on-prioritiesupdates on NSF priorities
A-TITLE Updates on NSF Priorities
/executive-ordersimplementation of recent executive orders
A-TITLE NSF Implementation of Recent Executive Orders
https://www.nsf.gov/IMG-ALT NSF - National Science Foundation - Home
/funding/opportunitiesFunding Search
https://www.nsf.gov/awardsearch/Subdomain Award Search
/funding/initiativesNSF-wide Initiatives
/funding/initiatives/reuResearch Experiences for Undergraduates
/funding/getting-startedFor Everyone
/funding/early-career-researchersFor Early-Career Researchers
/funding/postdocsFor Postdoctoral Fellows
/funding/graduate-studentsFor Graduate Students
/funding/undergraduatesFor Undergraduates
/funding/industryFor Industry
/funding/entrepreneursFor Entrepreneurs
/funding/preparing-proposalPreparing Your Proposal
/funding/submitting-proposalSubmitting Your Proposal
/policies/pappgProposal & Award Policies & Procedures Guide (PAPPG)
https://www.research.gov/resea...External Subdomain Research.gov
https://www.grants.gov/External Subdomain Grants.gov
/funding/merit-reviewHow We Make Funding Decisions
https://www.nsf.gov/awardsGetting Started
/awards/request-a-changeRequest a Change to Your Award
/awards/report-your-outcomesReport Your Outcomes
/policies/pappgText duplicate Proposal & Award Policies & Procedures Guide (PAPPG)
https://www.research.gov/resea...External Subdomain Text duplicate Research.gov
https://par.nsf.gov/External Subdomain NSF Public Access Repository
/awards/who-to-contactWho to Contact With Questions
https://www.nsf.gov/focus-areasExplore All Focus Areas
/focus-areas/arctic-antarcticArctic and Antarctic
/focus-areas/astronomy-spaceAstronomy and Space
/focus-areas/biologyBiology
/focus-areas/chemistryChemistry
/focus-areas/computingComputing
/focus-areas/workforceCreating a STEM Workforce
/focus-areas/earth-environmentEarth and Environment
/focus-areas/educationEducation and Training
/focus-areas/engineeringEngineering
/focus-areas/infrastructureFacilities and Infrastructure
/focus-areas/materialsMaterials Research
/focus-areas/mathematicsMathematics
/focus-areas/people-societyPeople and Society
/focus-areas/physicsPhysics
/focus-areas/research-partners...Research Partnerships
/focus-areas/technologyTechnology
https://www.nsf.gov/newsNews & Announcements
https://www.nsf.gov/impactsNSF Impacts
/science-mattersScience Matters Blog
/news/media-toolkitsFor the Press
https://www.nsf.gov/eventsUpcoming Events
https://www.nsf.gov/75yearsNSF 75th Anniversary
https://nsfpolicyoutreach.com/External Anchor NSF Grants Conference
https://www.nsf.gov/aboutAbout NSF
https://www.nsf.gov/about/visitVisit NSF
/about/contact-usContact Us
/about/directorates-officesHow NSF Is Organized
https://www.nsf.gov/bioBiological Sciences (BIO)
https://www.nsf.gov/ciseComputer & Information Science & Engineering (CISE)
https://www.nsf.gov/engEngineering (ENG)
https://www.nsf.gov/geoGeosciences (GEO)
https://www.nsf.gov/od/oiaIntegrative Activities (OIA)
https://www.nsf.gov/od/oiseInternational Science & Engineering (OISE)
https://www.nsf.gov/mpsMathematical & Physical Sciences (MPS)
https://www.nsf.gov/sbeSocial, Behavioral & Economic Sciences (SBE)
https://www.nsf.gov/eduSTEM Education (EDU)
https://www.nsf.gov/tipTechnology, Innovation & Partnerships (TIP)
https://ncses.nsf.gov/External Subdomain National Center for Science & Engineering Statistics (NCSES)
https://www.nsf.gov/nsb/Subdomain National Science Board (NSB)
https://www.nsf.gov/aboutLearn more
https://www.nsf.gov/Anchor View image credit & caption
https://www.nsf.gov/fundingFind & apply for funding
https://www.nsf.gov/newsExplore NSF discoveries
https://www.nsf.gov/focus-areasOur focus areas
https://www.nsf.gov/awardsearchWhat we've funded
/impacts/crisprCRISPR: A biotech breakthrough
/science-matters/pocket-sized-...Pocket-sized progress: Smartphones and NSF innovations
/science-matters/now-factory-f...Now on factory floors: Ultra-precise chip etching technology enabled by NSF-funded plasma science
/news/preparing-science-educat...Preparing science educators to use and teach AI in the classroom
https://www.nsf.gov/newsExplore all news
A-TITLE Explore all news
https://service.govdelivery.co...External Subdomain Sign up
A-TITLE Sign up
https://www.facebook.com/US.NSFExternal Subdomain IMG-ALT Facebook
https://www.twitter.com/NSFExternal Subdomain IMG-ALT Twitter
A-TITLE X (formerly known as Twitter)
https://www.instagram.com/nsfgovExternal Subdomain IMG-ALT Instagram
https://www.youtube.com/user/V...External Subdomain IMG-ALT YouTube
https://www.linkedin.com/compa...External Subdomain IMG-ALT LinkedIn
https://nsf.gov/rssIMG-ALT RSS
https://www.nsf.gov/focus-areasPromote discovery in science & engineering
/focus-areas/technologyAccelerate technology & innovation
/focus-areas/workforceCreate a STEM workforce
https://www.nsf.gov/focus-areasExplore what we support
A-TITLE Explore what we support
https://www.nsf.gov/impactsLearn more about our impacts
A-TITLE Learn more about our impacts
https://www.nsf.gov/Text duplicate IMG-ALT NSF - National Science Foundation - Home
https://service.govdelivery.co...External Subdomain Sign up for email updates
https://www.facebook.com/US.NSFExternal Subdomain Text duplicate IMG-ALT Facebook
https://www.twitter.com/NSFExternal Subdomain Text duplicate IMG-ALT Twitter
A-TITLE X (formerly known as Twitter)
https://www.instagram.com/nsfgovExternal Subdomain Text duplicate IMG-ALT Instagram
https://www.youtube.com/user/V...External Subdomain Text duplicate IMG-ALT YouTube
https://www.linkedin.com/compa...External Subdomain Text duplicate IMG-ALT LinkedIn
https://nsf.gov/rssText duplicate IMG-ALT RSS
https://www.nsf.gov/aboutText duplicate About NSF
https://www.nsf.gov/careersCareers
/about/directorates-officesOur Directorates & Offices
https://www.nsf.gov/nsbNational Science Board
/about/contact-usText duplicate Contact Us
https://www.nsf.gov/newsText duplicate News & Announcements
https://www.nsf.gov/eventsEvents
/science-mattersText duplicate Science Matters Blog
https://www.nsf.gov/fundingFunding Seekers
https://www.nsf.gov/awardsNSF Awardees
/about/congressCongress
/news/media-toolkitsMedia
/focus-areas/educationEducators
/about/meetingsPanelists
/documents-reportsDocuments & Reports
https://www.nsf.gov/about/budgetBudget, Performance & Financial Reporting
https://www.nsf.gov/public-accessPublic Access
/stopping-harassmentStopping Harassment
/research-securityResearch Security
/policies/scientific-integrityScientific Integrity
https://www.research.gov/resea...External Subdomain Text duplicate Research.gov
/policies/digital/vulnerabilit...Vulnerability disclosure
https://www.nsf.gov/oigInspector General
/policies/privacyPrivacy
https://www.nsf.gov/policies/foiaFOIA
/od/ocr/no-fear-actNo FEAR Act
https://www.usa.gov/External Subdomain USA.gov
/policies/accessibilitySubdomain Accessibility
/policies/nsf_plain_language.jspPlain language

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.nsf.gov/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time of 0.64 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
The file size of the HTML document is fine (79 kB).

HTTP Response Header

NameValue
content-typetext/html; charset=UTF-8
dateWed, 21 May 2025 05:55:48 GMT
x-xss-protection1; mode=block
strict-transport-securitymax-age=31536000; includeSubdomains
serverApache
x-content-type-optionsnosniff
cache-controlmax-age=1800, public, s-maxage=1800, stale-if-error=1800, stale-while-revalidate=300
x-drupal-dynamic-cacheMISS
content-languageen
x-frame-optionsSAMEORIGIN
expiresSun, 19 Nov 1978 05:00:00 GMT
last-modifiedWed, 21 May 2025 04:23:02 GMT
x-generatorDrupal 10 (https://www.drupal.org)
x-drupal-cacheHIT
content-encodinggzip
etag"1747801382-gzip"
varyAccept-Encoding,Cookie
x-cacheHit from cloudfront
via1.1 a823be133adad65df6d3bf471a742792.cloudfront.net (CloudFront)
x-amz-cf-popFRA56-P4
x-amz-cf-iddZFm5tK3YuiU2_q-Fj8uPnqGOEFZFrww7IWL8hoH4kk4NDDqfhYClg==
age479
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 8,366 referring domains.
This page has 1,608,328 backlinks.
This page has backlinks from 5,461 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed
# NSF
Disallow: /funding/opportunities?*
Disallow: /careers/openings?*
Disallow: /events?*
Disallow: /events/past?*
Disallow: /news/releases?*
Disallow: /news/releases/*
Disallow: /staff?*
Disallow: /honorary-awards/national-medal-science/recipients?*
Disallow: /honorary-awards/pecase/recipients?*
Disallow: /funding/initiatives/reu/search?*
# From legacy
Disallow: /cgi-bin/
Disallow: /awardsearch/*
Disallow: /awards/award_visualization.jsp*
Disallow: /awards/award_visualization_noscript.jsp*
Disallow: /events/event_calendar.jsp*
Disallow: /news/mmg*
Disallow: /por/*
Disallow: /pubs/*
# Sitemaps
Sitemap: https://www.nsf.gov/sitemap.xml
Sitemap: https://www.nsf.gov/sitemap-s3.xml

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www.nsf.gov
NSF - National Science Foundation
NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
NSF81%Check
Science68%Check
Science Engineering59%Check
National Science59%Check
supports science58%Check
Innovation56%Check
science engineering 5055%Check
gov52%Check
Engineering48%Check
States46%Check
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