jupyter.org
Project Jupyter | Home
Last scanned Jul 25, 2026, 12:25 PM · 2 views
Overall score
Great
Summary
The Jupyter Notebook is a web-based interactive computing platform. This website uses Plausible Analytics hosted on Fastly behind Fastly CDN. SEO is good (75/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
The Jupyter Notebook is a web-based interactive computing platform. The notebook combines live code, equations, narrative text, visualizations, interactive dashboards and other media.
- United States
- Hosted on Fastly
Top issues to fix
7 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.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
+1 more issue — details in the sections below.
SEO
3 issue(s) found
Performance
4 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- Project Jupyter | Home
- Description
- The Jupyter Notebook is a web-based interactive computing platform. The notebook combines live code, equations, narrative text, visualizations, interactive dashboards and other media.
- Canonical
- https://jupyter.org/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- jupyter.org
- Valid from
- Jun 21, 2026
- Valid to
- Sep 19, 2026
- Days until expiry
- 55
- SAN domains
- jupyter.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 9 · H3 12
Links
13 internal · 41 external · 0 broken
Images
48 total · 0 missing alt
Scripts / Styles
9 scripts · 2 stylesheets
JS / CSS size
43.6 KB · 34.4 KB
Page size
33.6 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- 16
SEO issues
- Meta description longer than 160 characters
- No H1 heading found
- No structured data (JSON-LD) found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://jupyter.org
- Final URL
- https://jupyter.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 4 ms
- HTML size
- 33.6 KB
- Redirect chain
- https://jupyter.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does jupyter.org use?
- jupyter.org is built with Plausible Analytics.
- Is jupyter.org secure (HTTPS)?
- Yes. jupyter.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 19, 2026.
- Who hosts jupyter.org?
- jupyter.org is hosted on Fastly, behind Fastly CDN.
- What is jupyter.org's SEO score?
- jupyter.org scored 75/100 for SEO in the latest analysis (fair).
- What is jupyter.org's overall website score?
- jupyter.org has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card