prototypejs.org
Prototype JavaScript framework: a foundation for ambitious web applications
Last scanned Jul 27, 2026, 9:43 AM · 1 view
Overall score
Fair
Summary
This website is hosted on GitHub. SEO is fair (55/100) and accessibility is good (85/100). Security scores poor (25/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.
- United States
- Hosted on GitHub
Top issues to fix
14 issues found · 4 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.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
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.
+8 more issues — details in the sections below.
SEO
7 issue(s) found
Performance
776 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Meta tags
- Title
- Prototype JavaScript framework: a foundation for ambitious web applications
- Description
- Canonical
- Language
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
No technologies detected.
Hosting & CDN
- Hosting provider
- GitHub
- CDN provider
- —
- IP address
- 192.30.252.153
- ASN
- AS36459 (GITHUB - GitHub, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Sectigo Limited
- Subject
- *.github.com
- Valid from
- Jun 12, 2026
- Valid to
- Sep 9, 2026
- Days until expiry
- 44
- SAN domains
- *.github.com, github.com
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 1 · H2 1 · H3 2
Links
13 internal · 0 external · 13 broken
Images
0 total · 0 missing alt
Scripts / Styles
0 scripts · 1 stylesheets
JS / CSS size
0 B · 0 B
Page size
3.5 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Title longer than 60 characters
- Missing meta description
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Missing <html lang> attribute
- Missing viewport meta tag
Scan details
- Requested URL
- https://prototypejs.org
- Final URL
- https://prototypejs.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 776 ms
- HTML size
- 3.5 KB
- Redirect chain
- https://prototypejs.org
See something wrong on this report? Request a correction
Related websites
Same hosting provider
Frequently asked questions
- What technology does prototypejs.org use?
- We did not detect any specific technologies for prototypejs.org in the latest scan.
- Is prototypejs.org secure (HTTPS)?
- Yes. prototypejs.org uses TLS 1.3 with a certificate issued by Sectigo Limited, valid until Sep 9, 2026.
- Who hosts prototypejs.org?
- prototypejs.org is hosted on GitHub.
- What is prototypejs.org's SEO score?
- prototypejs.org scored 55/100 for SEO in the latest analysis (fair).
- What is prototypejs.org's overall website score?
- prototypejs.org has an overall SiteGraph score of 65/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card