Nsf.org - SEO Checker

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Overview of the SEO Check
Meta information
97% 
Page quality
67% 
Page structure
78% 
Link structure
76% 
Server
91% 
External factors
100% 
SEO Score
Response time
0.32 s
File size
358.10 kB
Words
441
Media files
14
Number of links
45 internal / 6 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)
Language for link pointing to page itself inaccurate
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 441 words on this page. Good pages should have about 800 words of useful content.
29.5% 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.
6 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 14.9 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)
13 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
...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
...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
...ribbon-cutting-may-2025.jpg?v=1747387237No alt attribute provided
...en_food_truck_111738937.jpg?v=1643997999No alt attribute provided
...476137852.jpg?v=1747130817,0.6583,0.3308No alt attribute provided
...ual-Report-2024-Cover-1.jpg?v=1744384882No alt attribute provided
Video URLWidthHeight
...Video-2024-in-Review-v2.mp4?v=1744653294

Page structure

H1 heading
(Critically important)
Annual Review 2024
The H1 heading is too short (18 characters). It should be at least 20 Characters long.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H1 Annual Review 2024
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 NSF Strengthens Middle East Commitment with New Dubai Headquarters
H6 NSF Launches Checked by NSF™ Program in Latin America for Food Safety Verification
H6 NSF Research Shows Americans Demand Greater Clarity and Standardization in Food Labeling
H6 NSF’s Annual Review and Impact Report 2024
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 6 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
/about-nsf/annual-review-impac...New window Subdomain Read now
/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/nsf-middle-east-new-duba...Subdomain NSF Strengthens Middle East Commitment with New Dubai Headquarters May 19, 2025 Safer and healthier regional water systems at the forefront of Dubai Science ...
/news/nsf-launches-checked-by-...Subdomain NSF Launches Checked by NSF™ Program in Latin America for Food Safety Verification May 8, 2025 The Checked by NSF™ seal ensures transparency regarding food s...
/news/americans-demand-greater...Subdomain NSF Research Shows Americans Demand Greater Clarity and Standardization in Food Labeling May 14, 2025 Survey reveals striking gap between US consumer require...
/news/nsf-annual-review-impact...Subdomain NSF’s Annual Review and Impact Report 2024 April 15, 2025 At NSF, we are committed to shaping a healthier, safer world for everyone. Join us in celebrating o...
/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.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 0.32 seconds.
The file size of the HTML document is fine (358 kB).

HTTP Response Header

NameValue
dateMon, 19 May 2025 20:14:58 GMT
content-typetext/html; charset=utf-8
cache-controlpublic, max-age=14400
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
strict-transport-securitymax-age=15724800; includeSubDomains
last-modifiedMon, 19 May 2025 19:11:25 GMT
cf-cache-statusHIT
age3069
expiresTue, 20 May 2025 00:14:58 GMT
speculation-rules"/cdn-cgi/speculation"
servercloudflare
cf-ray9426437d2f956fa6-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 2,406 referring domains.
This page has 324,956 backlinks.
This page has backlinks from 1,715 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
NSF75%Check
Health and Safety64%Check
safety62%Check
NSF Standards61%Check
Public Safety60%Check
org59%Check
health58%Check
public58%Check
Public Health58%Check
Annual56%Check
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