lua.org
The Programming Language Lua
Last scanned Jul 29, 2026, 3:00 PM · 12 views
Overall score
Fair
Summary
Official website of the Lua language. This website uses Nginx. SEO is fair (60/100) and accessibility is good (75/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing canonical link.
Official website of the Lua language
Top issues to fix
12 issues found · 3 high priority
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 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.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
+6 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
204 ms
Security
HTTPS & header checks
Accessibility
3 issue(s) found
Score history
0 overall since Jul 21, 2026
- Overall
- 77
- SEO
- 60
- Security
- 75
- Performance
- 100
- Accessibility
- 75
Organization
Company details published in this site's own structured data.
Official website of the Lua language
Meta tags
- Title
- The Programming Language Lua
- Description
- Official website of the Lua language
- Canonical
- Language
- Charset
- iso-8859-1
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- lua.org
- Valid from
- Jun 13, 2026
- Valid to
- Sep 11, 2026
- Days until expiry
- 43
- SAN domains
- lua.org, www.lua.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 0
Links
9 internal · 1 external · 10 broken
Images
2 total · 0 missing alt
Scripts / Styles
0 scripts · 1 stylesheets
JS / CSS size
0 B · 377 B
Page size
2.0 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
- Missing <html lang> attribute
- Missing viewport meta tag
Scan details
- Requested URL
- https://lua.org
- Final URL
- https://lua.org
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 204 ms
- HTML size
- 2.0 KB
- Redirect chain
- https://lua.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does lua.org use?
- lua.org is built with Nginx.
- Is lua.org secure (HTTPS)?
- Yes. lua.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 11, 2026.
- Who hosts lua.org?
- Hosting provider information for lua.org is not available yet.
- What is lua.org's SEO score?
- lua.org scored 60/100 for SEO in the latest analysis (fair).
- What is lua.org's overall website score?
- lua.org has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.
- Has lua.org's score changed over time?
- lua.org's overall score has stayed steady at 77/100 since Jul 21, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card