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.

lua.org is hosted on MSYS-AS - Micro Systems Marc Balmer, CH.

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.

lua.org

The Programming Language Lua

Last scanned Jul 21, 2026, 11:40 AM · 2 views

Overall score

Fair

Top issues to fix

11 issues found · 3 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing viewport meta tag
Accessibility
Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.

+5 more issues — details in the sections below.

Summary

Official website of the Lua language. This website uses Nginx hosted on MSYS-AS - Micro Systems Marc Balmer, CH. 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.

SEO

6 issue(s) found

100

Performance

132 ms

Security

HTTPS & header checks

Accessibility

3 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Technologies

Detected frameworks, languages, and tools.

Nginx

Hosting & CDN

Hosting provider: MSYS-AS - Micro Systems Marc Balmer, CH
CDN provider: —
IP address: 46.175.8.47
ASN: AS199178 (MSYS-AS - Micro Systems Marc Balmer, CH)

DNS records

Type	Value
A	46.175.8.47
AAAA	—
MX	fb.mail.gandi.net spool.mail.gandi.net
TXT	v=spf1 include:_mailcust.gandi.net ?all
NS	dns1.msys.ch dns2.msys.ch
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: 51
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 · 0 broken

Images

2 total · 0 missing alt

Scripts / Styles

0 scripts · 1 stylesheets

JS / CSS size

0 B · 2.6 KB

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

Scan details

Requested URL: https://lua.org
Final URL: https://lua.org
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 132 ms
HTML size: 2.0 KB
Redirect chain: https://lua.org

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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?: lua.org is hosted on MSYS-AS - Micro Systems Marc Balmer, CH.
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.