gwern.net
Essays · Gwern.net
Last scanned Aug 5, 2026, 9:00 AM · 9 views
Overall score
Fair
Summary
Personal website of Gwern Branwen (writer, self-experimenter, and programmer): topics: psychology, statistics, technology, deep learning, anime. This website uses Google Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is good (75/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance good (75/100). Top issue: Meta description longer than 160 characters.
Personal website of Gwern Branwen (writer, self-experimenter, and programmer): topics: psychology, statistics, technology, deep learning, anime. This index page is a categorized list of Gwern.net pages.
- United States
- Hosted on Cloudflare
Products & pricing
Product and pricing information published in this site's own structured data.
Subscripts For Citations
$200 USD
Top issues to fix
8 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.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
+2 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
604 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
+3 overall since Jul 26, 2026
- Overall
- 78
- SEO
- 75
- Security
- 65
- Performance
- 75
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Personal website of Gwern Branwen (writer, self-experimenter, and programmer): topics: psychology, statistics, technology, deep learning, anime. This index page is a categorized list of Gwern.net pages.
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- Essays · Gwern.net
- Description
- Personal website of Gwern Branwen (writer, self-experimenter, and programmer): topics: psychology, statistics, technology, deep learning, anime. This index page is a categorized list of Gwern.net pages.
- Canonical
- https://gwern.net/index
- Language
- en-us
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.26.10.177
- 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
- gwern.net
- Valid from
- Jun 14, 2026
- Valid to
- Sep 12, 2026
- Days until expiry
- 38
- SAN domains
- gwern.net, *.gwern.net
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 43 · H2 0 · H3 0
Links
459 internal · 4 external · 0 broken
Images
0 total · 0 missing alt
Scripts / Styles
7 scripts · 2 stylesheets
JS / CSS size
1.2 MB · 421 KB
Page size
139 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- 22251
SEO issues
- Meta description longer than 160 characters
- Multiple H1 headings found
- No structured data (JSON-LD) found
- robots.txt not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://gwern.net
- Final URL
- https://gwern.net
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 602 ms
- HTML size
- 139 KB
- Redirect chain
- https://gwern.net
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does gwern.net use?
- gwern.net is built with Google Analytics.
- Is gwern.net secure (HTTPS)?
- Yes. gwern.net uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 12, 2026.
- Who hosts gwern.net?
- gwern.net is hosted on Cloudflare, behind Cloudflare CDN.
- What is gwern.net's SEO score?
- gwern.net scored 75/100 for SEO in the latest analysis (fair).
- What is gwern.net's overall website score?
- gwern.net has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.
- What products does gwern.net offer?
- gwern.net offers Subscripts For Citations.
- Has gwern.net's score changed over time?
- gwern.net's overall score has improved by 3 points (from 75 to 78) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card