khanacademy.org
Khan Academy | Free Online Courses, Lessons & Practice
Last scanned Jul 18, 2026, 8:49 PM
Overall score
Fair
Top issues to fix
10 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
1 cookie without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
+4 more issues — details in the sections below.
Summary
Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. This website is hosted on Fastly. SEO is fair (70/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance good (85/100). Top issue: Meta description longer than 160 characters.
SEO
4 issue(s) found
Performance
218 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- Khan Academy | Free Online Courses, Lessons & Practice
- Description
- Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.
- Canonical
- https://www.khanacademy.org/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
No technologies detected.
Hosting & CDN
- Hosting provider
- Fastly
- CDN provider
- —
- IP address
- 151.101.129.42
- ASN
- AS54113 (FASTLY - Fastly, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME |
|
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- GlobalSign nv-sa
- Subject
- *.ar.khanacademy.org
- Valid from
- Apr 26, 2026
- Valid to
- Nov 11, 2026
- Days until expiry
- 115
- SAN domains
- *.ar.khanacademy.org, *.az.khanacademy.org, *.bg.khanacademy.org, *.bn.khanacademy.org, *.cs.khanacademy.org, *.da.khanacademy.org, *.de.khanacademy.org, *.el.khanacademy.org, *.es.khanacademy.org, *.fa-af.khanacademy.org, *.fa.khanacademy.org, *.fr.khanacademy.org, *.gu.khanacademy.org, *.he.khanacademy.org, *.hi.khanacademy.org, *.hu.khanacademy.org, *.hy.khanacademy.org, *.id.khanacademy.org, *.it.khanacademy.org, *.ja.khanacademy.org, *.ka.khanacademy.org, *.kasandbox.org, *.kastatic.org, *.khanacademy.org, *.km.khanacademy.org, *.kn.khanacademy.org, *.ko.khanacademy.org, *.mn.khanacademy.org, *.ms.khanacademy.org, *.my.khanacademy.org, *.nb.khanacademy.org, *.nl.khanacademy.org, *.pa.khanacademy.org, *.pl.khanacademy.org, *.pt-pt.khanacademy.org, *.pt.khanacademy.org, *.ro.khanacademy.org, *.ru.khanacademy.org, *.sr.khanacademy.org, *.sv.khanacademy.org, *.sw.khanacademy.org, *.ta.khanacademy.org, *.te.khanacademy.org, *.th.khanacademy.org, *.tr.khanacademy.org, *.uk.khanacademy.org, *.ur.khanacademy.org, *.uz.khanacademy.org, *.vi.khanacademy.org, *.xh.khanacademy.org, *.zero.khanacademy.org, *.zh.khanacademy.org, *.zu.khanacademy.org, content.khanacademy.org, fastly.kastatic.org, kasandbox.org, zero.khanacademy.org, *.khan.co
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 1 cookie(s) observed
Content & assets
Headings
H1 0 · H2 1 · H3 4
Links
21 internal · 16 external · 2 broken
Images
6 total · 0 missing alt
Scripts / Styles
9 scripts · 1 stylesheets
JS / CSS size
2.5 MB · 188 KB
Page size
3.0 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- No H1 heading found
- No structured data (JSON-LD) found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://khanacademy.org
- Final URL
- https://www.khanacademy.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 218 ms
- HTML size
- 3.0 KB
- Redirect chain
- https://khanacademy.org → https://www.khanacademy.org/
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Frequently asked questions
- What technology does khanacademy.org use?
- We did not detect any specific technologies for khanacademy.org in the latest scan.
- Is khanacademy.org secure (HTTPS)?
- Yes. khanacademy.org uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Nov 11, 2026.
- Who hosts khanacademy.org?
- khanacademy.org is hosted on Fastly.
- What is khanacademy.org's SEO score?
- khanacademy.org scored 70/100 for SEO in the latest analysis (fair).
- What is khanacademy.org's overall website score?
- khanacademy.org has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.
- Is khanacademy.org hiring?
- khanacademy.org has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card