lesswrong.com
LessWrong
Last scanned Aug 2, 2026, 9:00 AM · 9 views
Overall score
Fair
Summary
A community blog devoted to refining the art of rationality. This website uses WordPress behind Vercel CDN. SEO is good (80/100) and accessibility is fair (60/100). Security scores good (75/100) and performance excellent (90/100). Top issue: No structured data (JSON-LD) found.
A community blog devoted to refining the art of rationality
Top issues to fix
10 issues found · 2 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
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.
2 cookies without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
+4 more issues — details in the sections below.
SEO
3 issue(s) found
Performance
65 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Score history
+3 overall since Jul 26, 2026
- Overall
- 77
- SEO
- 80
- Security
- 75
- Performance
- 90
- Accessibility
- 60
Organization
Company details published in this site's own structured data.
A community blog devoted to refining the art of rationality
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- LessWrong
- Description
- A community blog devoted to refining the art of rationality
- Canonical
- https://www.lesswrong.com/
- Language
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Vercel
- 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
- www.lesswrong.com
- Valid from
- Jul 28, 2026
- Valid to
- Oct 26, 2026
- Days until expiry
- 85
- SAN domains
- www.lesswrong.com
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 2 cookie(s) observed
Content & assets
Headings
H1 1 · H2 2 · H3 0
Links
75 internal · 9 external · 20 broken
Images
4 total · 3 missing alt
Scripts / Styles
120 scripts · 7 stylesheets
JS / CSS size
686 KB · 43 B
Page size
853 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- Missing <html lang> attribute
Scan details
- Requested URL
- https://lesswrong.com
- Final URL
- https://www.lesswrong.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 48 ms
- HTML size
- 853 KB
- Redirect chain
- https://lesswrong.com → https://www.lesswrong.com/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does lesswrong.com use?
- lesswrong.com is built with Next.js, WordPress.
- Is lesswrong.com secure (HTTPS)?
- Yes. lesswrong.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 26, 2026.
- Who hosts lesswrong.com?
- Hosting provider information for lesswrong.com is not available yet.
- What is lesswrong.com's SEO score?
- lesswrong.com scored 80/100 for SEO in the latest analysis (great).
- What is lesswrong.com's overall website score?
- lesswrong.com has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.
- Has lesswrong.com's score changed over time?
- lesswrong.com's overall score has improved by 3 points (from 74 to 77) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card