protobuf.dev
Protocol Buffers Documentation
Last scanned Aug 5, 2026, 11:00 PM · 8 views
Overall score
Great
Summary
Protocol Buffers are language-neutral, platform-neutral extensible mechanisms for serializing structured data. This website uses Google Analytics hosted on Fastly behind Fastly CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (90/100). Top issue: Missing canonical link.
Protocol Buffers are language-neutral, platform-neutral extensible mechanisms for serializing structured data.
- United States
- Hosted on Fastly
Top issues to fix
6 issues found · 1 high priority
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.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
SEO
3 issue(s) found
Performance
207 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
-1 overall since Jul 26, 2026
- Overall
- 85
- SEO
- 80
- Security
- 75
- Performance
- 90
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Protocol Buffers are language-neutral, platform-neutral extensible mechanisms for serializing structured data.
Contact
Email, phone, and address published on this site's own pages.
- jdoe@example.com
Meta tags
- Title
- Protocol Buffers Documentation
- Description
- Protocol Buffers are language-neutral, platform-neutral extensible mechanisms for serializing structured data.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1,shrink-to-fit=no
- Robots meta
- index, follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
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
- protobuf.dev
- Valid from
- Jun 21, 2026
- Valid to
- Sep 19, 2026
- Days until expiry
- 44
- SAN domains
- protobuf.dev, www.protobuf.dev
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 4 · H3 0
Links
101 internal · 15 external · 0 broken
Images
0 total · 0 missing alt
Scripts / Styles
8 scripts · 1 stylesheets
JS / CSS size
171 KB · 384 KB
Page size
49.7 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- 236
SEO issues
- Missing canonical link
- No structured data (JSON-LD) found
- robots.txt not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://protobuf.dev
- Final URL
- https://protobuf.dev
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 206 ms
- HTML size
- 49.7 KB
- Redirect chain
- https://protobuf.dev
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does protobuf.dev use?
- protobuf.dev is built with jQuery, Google Analytics.
- Is protobuf.dev secure (HTTPS)?
- Yes. protobuf.dev uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 19, 2026.
- Who hosts protobuf.dev?
- protobuf.dev is hosted on Fastly, behind Fastly CDN.
- What is protobuf.dev's SEO score?
- protobuf.dev scored 80/100 for SEO in the latest analysis (great).
- What is protobuf.dev's overall website score?
- protobuf.dev has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.
- Has protobuf.dev's score changed over time?
- protobuf.dev's overall score has declined by 1 point (from 86 to 85) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card