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SGSiteGraph

cert-manager.io

cert-manager

Last scanned Jul 26, 2026, 12:49 PM

86

Overall score

Great

Summary

Cloud native X.509 certificate management for Kubernetes and OpenShift. This website uses Next.js behind Netlify CDN. SEO is good (80/100) and accessibility is excellent (90/100). Security scores good (75/100) and performance excellent (100/100). Top issue: No structured data (JSON-LD) found.

Cloud native X.509 certificate management for Kubernetes and OpenShift

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.

  • 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.

  • sitemap.xml not found

    SEO

    Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+2 more issues — details in the sections below.

80

SEO

3 issue(s) found

100

Performance

283 ms

75

Security

HTTPS & header checks

90

Accessibility

1 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.

Cloud native X.509 certificate management for Kubernetes and OpenShift

X (Twitter)

Meta tags

Title
cert-manager
Description
Cloud native X.509 certificate management for Kubernetes and OpenShift
Canonical
https://cert-manager.io/
Language
Charset
utf-8
Viewport
width=device-width
Robots meta
index,follow
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
cert-manager
og:description
Cloud native X.509 certificate management for Kubernetes and OpenShift
og:type
website
og:url
https://cert-manager.io/

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Next.jsGoogle Analytics

Hosting & CDN

Hosting provider
—
CDN provider
Netlify
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
cert-manager.io
Valid from
Jun 8, 2026
Valid to
Sep 6, 2026
Days until expiry
39
SAN domains
acme.cert-manager.io, cert-manager.dev, cert-manager.io, controller.cert-manager.io, docs.cert-manager.io, experimental.cert-manager.io, netlify.cert-manager.io, trust-manager.dev, trust-manager.io, venafi.cert-manager.io, www.cert-manager.io

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 1 · H3 1

Links

5 internal · 8 external · 13 broken

Images

10 total · 0 missing alt

Scripts / Styles

14 scripts · 1 stylesheets

JS / CSS size

351 B · 0 B

Page size

90.0 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

  • Missing <html lang> attribute

Scan details

Requested URL
https://cert-manager.io
Final URL
https://cert-manager.io
HTTP status
200
HTTP version
HTTP/2
Response time
282 ms
HTML size
90.0 KB
Redirect chain
https://cert-manager.io

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does cert-manager.io use?
cert-manager.io is built with Next.js, Google Analytics.
Is cert-manager.io secure (HTTPS)?
Yes. cert-manager.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 6, 2026.
Who hosts cert-manager.io?
Hosting provider information for cert-manager.io is not available yet.
What is cert-manager.io's SEO score?
cert-manager.io scored 80/100 for SEO in the latest analysis (great).
What is cert-manager.io's overall website score?
cert-manager.io has an overall SiteGraph score of 86/100, combining SEO, performance, security, and accessibility.