html5up.net
HTML5 UP! Responsive HTML5 and CSS3 Site Templates
Last scanned Jul 21, 2026, 11:46 AM · 1 view
Overall score
Great
Top issues to fix
7 issues found · 2 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 X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
Missing html lang attribute
AccessibilitySet <html lang="…"> so screen readers pick the right pronunciation rules.
+1 more issue — details in the sections below.
Summary
Responsive HTML5 and CSS3 site templates designed by @ajlkn. This website uses Google Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is good (85/100) and accessibility is excellent (90/100). Security scores good (75/100) and performance excellent (100/100). Top issue: No structured data (JSON-LD) found.
SEO
2 issue(s) found
Performance
239 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- HTML5 UP! Responsive HTML5 and CSS3 Site Templates
- Description
- Responsive HTML5 and CSS3 site templates designed by @ajlkn.
- Canonical
- https://html5up.net/
- Language
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1, user-scalable=no
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 172.67.195.190
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX |
|
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- html5up.net
- Valid from
- Jul 9, 2026
- Valid to
- Oct 7, 2026
- Days until expiry
- 78
- SAN domains
- html5up.net, *.html5up.net
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 46 · H3 1
Links
90 internal · 5 external · 8 broken
Images
44 total · 0 missing alt
Scripts / Styles
9 scripts · 1 stylesheets
JS / CSS size
398 KB · 5.3 KB
Page size
29.6 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 1
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- No structured data (JSON-LD) found
- sitemap.xml not found
Accessibility issues
- Missing <html lang> attribute
Scan details
- Requested URL
- https://html5up.net
- Final URL
- https://html5up.net
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 239 ms
- HTML size
- 29.6 KB
- Redirect chain
- https://html5up.net
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Frequently asked questions
- What technology does html5up.net use?
- html5up.net is built with Google Analytics, Cloudflare Analytics, Meta Pixel.
- Is html5up.net secure (HTTPS)?
- Yes. html5up.net uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 7, 2026.
- Who hosts html5up.net?
- html5up.net is hosted on Cloudflare, behind Cloudflare CDN.
- What is html5up.net's SEO score?
- html5up.net scored 85/100 for SEO in the latest analysis (great).
- What is html5up.net's overall website score?
- html5up.net has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card