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?

Hosting provider information for protobuf.dev is not available yet.

What is protobuf.dev's SEO score?

protobuf.dev scored 75/100 for SEO in the latest analysis (fair).

What is protobuf.dev's overall website score?

protobuf.dev has an overall SiteGraph score of 86/100, combining SEO, performance, security, and accessibility.

protobuf.dev

Protocol Buffers Documentation

Last scanned Jul 26, 2026, 5:47 AM

Overall score

Great

Summary

Protocol Buffers are language-neutral, platform-neutral extensible mechanisms for serializing structured data. This website uses Google Analytics behind Fastly CDN. SEO is good (75/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing canonical link.

Protocol Buffers are language-neutral, platform-neutral extensible mechanisms for serializing structured data.

Top issues to fix

8 issues found · 1 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.

+2 more issues — details in the sections below.

SEO

4 issue(s) found

100

Performance

216 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

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.

Email: 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.

jQuery Google Analytics

Hosting & CDN

Hosting provider: —
CDN provider: Fastly
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: protobuf.dev
Valid from: Jun 21, 2026
Valid to: Sep 19, 2026
Days until expiry: 52
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 · 14 external · 20 broken

Images

0 total · 0 missing alt

Scripts / Styles

8 scripts · 1 stylesheets

JS / CSS size

274 B · 0 B

Page size

49.7 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Missing canonical link
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://protobuf.dev
Final URL: https://protobuf.dev
HTTP status: 200
HTTP version: HTTP/2
Response time: 215 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?: Hosting provider information for protobuf.dev is not available yet.
What is protobuf.dev's SEO score?: protobuf.dev scored 75/100 for SEO in the latest analysis (fair).
What is protobuf.dev's overall website score?: protobuf.dev has an overall SiteGraph score of 86/100, combining SEO, performance, security, and accessibility.

Top issues to fix

Organization

Contact

Meta tags

OpenGraph & Twitter Card

Technologies

Hosting & CDN

DNS records

TLS / SSL certificate

Security headers

Content & assets

Robots.txt & Sitemap

SEO issues

Accessibility issues

Scan details

Related websites

Frequently asked questions