gnucc.online
Compiler Explorer
Last scanned Aug 24, 2026, 1:21 PM · 4 views
Overall score
Fair
Summary
Compiler Explorer is an interactive online compiler which shows the assembly output of compiled C++, Rust, Go (and many more) code. This website uses Express. SEO is fair (65/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.
Compiler Explorer is an interactive online compiler which shows the assembly output of compiled C++, Rust, Go (and many more) code.
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.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
+4 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
318 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Compiler Explorer is an interactive online compiler which shows the assembly output of compiled C++, Rust, Go (and many more) code.
Contact
Email, phone, and address published on this site's own pages.
- matt@godbolt.org
Meta tags
- Title
- Compiler Explorer
- Description
- Compiler Explorer is an interactive online compiler which shows the assembly output of compiled C++, Rust, Go (and many more) code.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0, user-scalable=no, shrink-to-fit=no
- 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
- gnucc.online
- Valid from
- Aug 2, 2026
- Valid to
- Oct 31, 2026
- Days until expiry
- 68
- SAN domains
- *.gnucc.online, gnucc.online
Security headers
- Strict-Transport-SecurityMissing
- 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
2 internal · 23 external · 6 broken
Images
7 total · 1 missing alt
Scripts / Styles
6 scripts · 2 stylesheets
JS / CSS size
756 B · 119 KB
Page size
112 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
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://gnucc.online
- Final URL
- https://gnucc.online
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 316 ms
- HTML size
- 112 KB
- Redirect chain
- https://gnucc.online
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does gnucc.online use?
- gnucc.online is built with Express, Node.js, Nginx.
- Is gnucc.online secure (HTTPS)?
- Yes. gnucc.online uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 31, 2026.
- Who hosts gnucc.online?
- Hosting provider information for gnucc.online is not available yet.
- What is gnucc.online's SEO score?
- gnucc.online scored 65/100 for SEO in the latest analysis (fair).
- What is gnucc.online's overall website score?
- gnucc.online has an overall SiteGraph score of 79/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card