Nsf.org - SEO Checker

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Overview of the SEO Check
Meta information
100% 
Page quality
67% 
Page structure
79% 
Link structure
76% 
Server
91% 
External factors
100% 
SEO Score
Response time
0.38 s
File size
379.40 kB
Words
453
Media files
15
Number of links
44 internal / 9 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
NSF | The Public Health and Safety Organization
The length of the page title is perfect. (436 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
NSF, a trusted authority for health standards, testing, certification, and consulting, enhances global human health with public safety standards and...
The length of the meta description is perfect. (904 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.nsf.org/
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)
The specified alternate links have no errors.
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
viewportwidth=device-width, initial-scale=1
descriptionNSF, a trusted authority for health standards, testing, certification, and consulting, enhances global human health with public safety standards and...
referrerno-referrer-when-downgrade
robotsindex, follow
apple-mobile-web-app-titleNSF
application-nameNSF
msapplication-TileColor#005092
msapplication-config/browserconfig.xml
theme-color#ffffff
fb:profile_id148548965168926
google-site-verification_RDnIuu0xsA_OAntp5qZUijgpc4__Wt3U8GfF1pRy6E
next-size-adjustEmpty
langen
twitter:cardsummary_large_image
twitter:site@NSF_Intl
twitter:creator@NSF_Intl
twitter:titleThe Public Health and Safety Organization
twitter:descriptionNSF, a trusted authority for health standards, testing, certification, and consulting, enhances global human health with public safety standards and...
twitter:imagehttps://d2evkimvhatqav.cloudfront.net/images/lab/germany/_1200x630_crop_center-center_82_none/2304-sturmfes-nsf-erdmann-chemische-analytik_40277.jpg?v=1741189254%2C0.5136%2C0.4078
twitter:image:width1200
twitter:image:height630
og:titleThe Public Health and Safety Organization
og:descriptionNSF, a trusted authority for health standards, testing, certification, and consulting, enhances global human health with public safety standards and...
og:urlhttps://www.nsf.org
og:localeen_US
og:imagehttps://d2evkimvhatqav.cloudfront.net/images/lab/germany/_1200x630_crop_center-center_82_none/2304-sturmfes-nsf-erdmann-chemische-analytik_40277.jpg?v=1741189254%2C0.5136%2C0.4078
og:image:width1200
og:image:height630
og:typewebsite
charsetutf-8

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Page quality

Content
(Critically important)
There are only 453 words on this page. Good pages should have about 800 words of useful content.
28.5% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
8 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 16.91 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 9 tags for this page.
Image SEO
(Somewhat important)
15 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
...sting-outside_498626623.jpg?v=1700237174No alt attribute provided
...icon-certified-products.svg?v=1699533062No alt attribute provided
...ge/icon-audits-per-year.svg?v=1699533061No alt attribute provided
...hed-standards-protocols.svg?v=1699533059No alt attribute provided
...istia.com/embed/medias/mm900adjar/swatchNo alt attribute provided
...hrough-crops_1330386244.jpg?v=1724070471No alt attribute provided
...-with-couple_1063752434.jpg?v=1699461248No alt attribute provided
...-vitamin-label_80284602.jpg?v=1699462291No alt attribute provided
...ng-on-screen_1371160707.jpg?v=1699542746No alt attribute provided
...1455701949.jpg?v=1699460627,0.566,0.2767No alt attribute provided
...320444455.jpg?v=1699535086,0.4933,0.2478No alt attribute provided
...products-shop_897536118.jpg?v=1740563485No alt attribute provided
...ailshot-update.0aff8a8b.jpg?v=1739965639No alt attribute provided
...rence-meeting_966266132.jpg?v=1739538171No alt attribute provided
...010851856.jpg?v=1736354706,0.4982,0.6664No alt attribute provided

Page structure

H1 heading
(Critically important)
Improving Human and Planet Health
The H1 heading is perfect.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H1 Improving Human and Planet Health
H2 NSF In Focus
H2 Join Our Team
H3 What We Do
H3 The NSF Commitment
H3 NSF Standards
H3 How NSF Can Help You
H3 News and Events
H5 Sectors
H5 Services
H5 Resources
H6 74% of Consumers Consider Organic Ingredients Important in Personal Care Products
H6 Foodservice Packaging Company World Centric Becomes First NSF Client to Earn an Environmental Claim Verification
H6 NSF Announces Sponsorship of 2025 GFSI Conference in Dublin
H6 NSF Granted Reauthorization as a CMMC Third-Party Assessment Organization
Some internal link anchor texts are too long.
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
The number of internal links is ok.
There are 9 external links on this page.

Found links on this page

LinkAttributesAnchor text
/about-nsf/careersSubdomain Careers
https://my.nsf.org/nsfonline/External Subdomain Anchor Client Login
https://www.nsf.org/NSF Logo
https://www.nsf.org/contact-usSubdomain Contact Us
/certified-products-systemsSubdomain Certified Products and Systems
https://www.nsf.org/Text duplicate NSF Logo
https://www.nsf.org/contact-usSubdomain Contact us
/certified-products-systemsSubdomain Learn More
https://www.nsf.org/auditingSubdomain Text duplicate Learn More
https://www.nsf.org/nsf-standardsSubdomain Text duplicate Learn More
https://80years.nsf.org/nsf-ce...External Subdomain Read the digital book
https://www.nsf.org/about-nsfSubdomain Learn More About NSF
/about-nsf/nsf-markSubdomain Learn More About The NSF Mark
https://www.nsf.org/nsf-standardsSubdomain Learn More About NSF Standards
/about-nsf/careersSubdomain Explore Opportunities
https://www.nsf.org/contact-usSubdomain Text duplicate Contact Us
/news/consumers-consider-perso...Subdomain 74% of Consumers Consider Organic Ingredients Important in Personal Care Products March 6, 2025 NSF research demonstrates the growing demand for cleaner choi...
/news/foodservice-packaging-co...Subdomain Foodservice Packaging Company World Centric Becomes First NSF Client to Earn an Environmental Claim Verification February 19, 2025 NSF verified that World Ce...
/news/nsf-announces-sponsorshi...Subdomain NSF Announces Sponsorship of 2025 GFSI Conference in Dublin February 17, 2025 NSF is proud to sponsor the 2025 GFSI Conference, an annual event that brings t...
/news/nsf-granted-reauthorizat...Subdomain NSF Granted Reauthorization as a CMMC Third-Party Assessment Organization January 8, 2025 Cyber AB’s reauthorization allows NSF to conduct CMMC Level 2 asses...
/certified-products-systemsSubdomain Search Certified Products and Systems
https://www.nsf.org/Text duplicate NSF Logo
https://www.nsf.org/food-beverageSubdomain Food and Beverage
https://www.nsf.org/water-systemsSubdomain Water Systems
https://www.nsf.org/life-sciencesSubdomain Life Sciences
/nutrition-wellnessSubdomain Nutrition and Wellness
/transportationSubdomain Transportation
/auditing?serviceType=auditingSubdomain Auditing
/certification?serviceType=cer...Subdomain Certification
/consulting?serviceType=consul...Subdomain Consulting
https://www.nsf.org/trainingSubdomain Training
https://www.nsf.org/lab-testingSubdomain Labs and Testing
/management-systems/informatio...Subdomain Information Security
/digital-solutionsSubdomain Digital Solutions
/sustainabilitySubdomain Sustainability
https://www.nsf.org/electricalSubdomain Electrical Safety
/about-nsf/careersSubdomain Text duplicate Careers
https://www.nsf.org/contact-usSubdomain Text duplicate Contact Us
https://www.nsf.org/newsSubdomain News
/about-nsf/public-noticesSubdomain Public Notices
https://my.nsf.org/nsfonline/External Subdomain Anchor Text duplicate Client Login
/certified-products-systemsSubdomain Text duplicate Search Certified Products and Systems
https://www.techstreet.com/nsf/New window External Subdomain Purchase NSF Standards
https://www.linkedin.com/compa...New window External Subdomain linkedin
A-TITLE linkedin
https://www.facebook.com/NSFIn...New window External Subdomain facebook
A-TITLE facebook
https://twitter.com/NSF_IntlNew window External twitter
A-TITLE twitter
https://www.youtube.com/user/N...New window External Subdomain youtube
A-TITLE youtube
https://www.instagram.com/nsf_...New window External Subdomain instagram
A-TITLE instagram
/privacy-copyrightSubdomain Privacy and Copyright
https://www.nsf.org/code-ethicsSubdomain Code of Ethics
/aoda-accessibility-planSubdomain AODA Accessibility Plan
/ats-data-privacySubdomain NSF ATS Data Privacy Statement
/modern-slavery-transparency-s...Subdomain Modern Slavery Act Transparency Statement

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.nsf.org/"
HTTP header
(Important)
The X-powered header is sent within the response header. (unnecessary)
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.38 seconds.
The file size of the HTML document is fine (379 kB).

HTTP Response Header

NameValue
dateTue, 18 Mar 2025 07:21:04 GMT
content-typetext/html; charset=utf-8
cdn-cache-controlmax-age=21600, stale-while-revalidate=600, stale-if-error=7200
x-middleware-rewrite/us/en/$homepage/
varyRSC, Next-Router-State-Tree, Next-Router-Prefetch, Accept-Encoding
link</_next/static/media/a34f9d1faa5f3315-s.p.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2"
x-powered-byNext.js
cache-controlprivate, max-age=14400, must-revalidate
strict-transport-securitymax-age=15724800; includeSubDomains
last-modifiedMon, 17 Mar 2025 23:05:19 GMT
cf-cache-statusHIT
age8155
speculation-rules"/cdn-cgi/speculation"
servercloudflare
cf-ray9222f89c3ccb0189-CDG
content-encodinggzip
alt-svch3=":443"; ma=86400
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 13,831 referring domains.
This page has 1,537,875 backlinks.
This page has backlinks from 7,292 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

# robots.txt for https://www.nsf.org/

Sitemap: https://www.nsf.org/sitemaps-2-sitemap.xml

# live - don't allow web crawlers to index cpresources/ or vendor/

User-agent: *
Disallow: /cpresources/
Disallow: /vendor/
Disallow: /.env
Disallow: /cache/
Disallow: /*?serviceType=

Similar sites

Search preview

www.nsf.org
NSF | The Public Health and Safety Organization
NSF, a trusted authority for health standards, testing, certification, and consulting, enhances global human health with public safety standards and...

Most important keywords

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

KeywordResultRecheck
NSF73%Check
Health73%Check
Health and Safety71%Check
org68%Check
Public Health65%Check
Human62%Check
health standards62%Check
Planet Health62%Check
NSF Standards60%Check
public58%Check
Show more keywords and terms

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