sheldonbrown.com
Sheldon Brown-Bicycle Technical Information
Last scanned Jul 26, 2026, 1:49 PM
Overall score
Great
Summary
A go-to source of information about bicycle maintenance, repair and customization. This website uses Apache. SEO is fair (65/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.
A go-to source of information about bicycle maintenance, repair and customization
Top issues to fix
11 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.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
+5 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
295 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
A go-to source of information about bicycle maintenance, repair and customization
Meta tags
- Title
- Sheldon Brown-Bicycle Technical Information
- Description
- A go-to source of information about bicycle maintenance, repair and customization
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- 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
- sheldonbrown.com
- Valid from
- Jul 5, 2026
- Valid to
- Oct 3, 2026
- Days until expiry
- 66
- SAN domains
- sheldonbrown.com, www.sheldonbrown.com
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 2 · H2 2 · H3 3
Links
58 internal · 1 external · 20 broken
Images
10 total · 0 missing alt
Scripts / Styles
13 scripts · 3 stylesheets
JS / CSS size
1.3 KB · 0 B
Page size
10.8 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- Multiple H1 headings found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://sheldonbrown.com
- Final URL
- https://sheldonbrown.com
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 295 ms
- HTML size
- 10.8 KB
- Redirect chain
- https://sheldonbrown.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does sheldonbrown.com use?
- sheldonbrown.com is built with Google Analytics, Google Ads, Meta Pixel, Apache.
- Is sheldonbrown.com secure (HTTPS)?
- Yes. sheldonbrown.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 3, 2026.
- Who hosts sheldonbrown.com?
- Hosting provider information for sheldonbrown.com is not available yet.
- What is sheldonbrown.com's SEO score?
- sheldonbrown.com scored 65/100 for SEO in the latest analysis (fair).
- What is sheldonbrown.com's overall website score?
- sheldonbrown.com has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card