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nsf.gov

NSF - U.S. National Science Foundation

Last scanned Jul 29, 2026, 4:00 PM · 12 views

92

Overall score

Excellent

Summary

NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. This website uses Apache behind CloudFront CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: No structured data (JSON-LD) found.

NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.

Top issues to fix

6 issues found · 1 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • 1 cookie without Secure/HttpOnly flags

    Security

    Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

  • robots.txt not found

    SEO

    Publish /robots.txt with a Sitemap: directive to guide crawlers.

  • sitemap.xml not found

    SEO

    Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

  • 20 broken links on the page

    SEO

    Fix or remove broken links — they waste crawl budget and erode user trust.

80

SEO

3 issue(s) found

100

Performance

364 ms

90

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

+2 overall since Jul 21, 2026

Overall
92
SEO
80
Security
90
Performance
100
Accessibility
100

Organization

Company details published in this site's own structured data.

NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.

FacebookX (Twitter)InstagramYouTubeLinkedIn

Contact

Email, phone, and address published on this site's own pages.

Meta tags

Title
NSF - U.S. National Science Foundation
Description
NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.
Canonical
https://www.nsf.gov/
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1.0
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
NSF - U.S. National Science Foundation
og:description
NSF'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:type
website
og:url
https://www.nsf.gov/

Twitter Card

twitter:card
summary_large_image
twitter:title
NSF - U.S. National Science Foundation
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

DrupalApache

Hosting & CDN

Hosting provider
—
CDN provider
CloudFront
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Amazon
Subject
*.nsf.gov
Valid from
May 29, 2026
Valid to
Dec 12, 2026
Days until expiry
136
SAN domains
*.nsf.gov

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 1 · H2 10 · H3 7

Links

83 internal · 12 external · 20 broken

Images

26 total · 0 missing alt

Scripts / Styles

16 scripts · 2 stylesheets

JS / CSS size

2.7 KB · 0 B

Page size

73.5 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • No structured data (JSON-LD) found
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://nsf.gov
Final URL
https://www.nsf.gov/
HTTP status
200
HTTP version
HTTP/2
Response time
363 ms
HTML size
73.5 KB
Redirect chain
https://nsf.gov → https://www.nsf.gov/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does nsf.gov use?
nsf.gov is built with Drupal, Apache.
Is nsf.gov secure (HTTPS)?
Yes. nsf.gov uses TLS 1.3 with a certificate issued by Amazon, valid until Dec 12, 2026.
Who hosts nsf.gov?
Hosting provider information for nsf.gov is not available yet.
What is nsf.gov's SEO score?
nsf.gov scored 80/100 for SEO in the latest analysis (great).
What is nsf.gov's overall website score?
nsf.gov has an overall SiteGraph score of 92/100, combining SEO, performance, security, and accessibility.
Has nsf.gov's score changed over time?
nsf.gov's overall score has improved by 2 points (from 90 to 92) since Jul 21, 2026.