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zerossl.com

Free SSL Certificates and SSL Tools - ZeroSSL

Last scanned Jul 26, 2026, 5:47 AM · 1 view

89

Overall score

Great

Summary

Free SSL certificates issued instantly online, supporting ACME clients, SSL monitoring, quick validation and automated SSL renewal via ZeroSSL Bot or REST API. This website uses Plausible Analytics behind Cloudflare CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance excellent (100/100). Top issue: No structured data (JSON-LD) found.

Free SSL certificates issued instantly online, supporting ACME clients, SSL monitoring, quick validation and automated SSL renewal via ZeroSSL Bot or REST API.

Top issues to fix

6 issues found · 2 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • 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.

  • 20 broken links on the page

    SEO

    Fix or remove broken links — they waste crawl budget and erode user trust.

80

SEO

3 issue(s) found

100

Performance

15 ms

80

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.

Free SSL certificates issued instantly online, supporting ACME clients, SSL monitoring, quick validation and automated SSL renewal via ZeroSSL Bot or REST API.

Meta tags

Title
Free SSL Certificates and SSL Tools - ZeroSSL
Description
Free SSL certificates issued instantly online, supporting ACME clients, SSL monitoring, quick validation and automated SSL renewal via ZeroSSL Bot or REST API.
Canonical
https://zerossl.com
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no
Robots meta
index, follow
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
Free SSL Certificates and SSL Tools - ZeroSSL
og:description
Free SSL certificates issued instantly online, supporting ACME clients, SSL monitoring, quick validation and automated SSL renewal via ZeroSSL Bot or REST API.
og:type
website
og:url
https://zerossl.com

Twitter Card

twitter:card
summary_large_image
twitter:title
Free SSL Certificates and SSL Tools - ZeroSSL
twitter:description
Free SSL certificates issued instantly online, supporting ACME clients, SSL monitoring, quick validation and automated SSL renewal via ZeroSSL Bot or REST API.

Technologies

Detected frameworks, languages, and tools.

Google AnalyticsPlausible Analytics

Hosting & CDN

Hosting provider
—
CDN provider
Cloudflare
IP address
—
ASN
—

DNS records

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

TLS / SSL certificate

Version
TLS 1.3
Issuer
Google Trust Services
Subject
zerossl.com
Valid from
Jul 23, 2026
Valid to
Oct 21, 2026
Days until expiry
84
SAN domains
zerossl.com, *.zerossl.com

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyEnabled
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 2 · H3 7

Links

23 internal · 8 external · 20 broken

Images

69 total · 0 missing alt

Scripts / Styles

5 scripts · 2 stylesheets

JS / CSS size

1.1 KB · 273 B

Page size

106 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

No accessibility issues detected.

Scan details

Requested URL
https://zerossl.com
Final URL
https://zerossl.com
HTTP status
200
HTTP version
HTTP/2
Response time
13 ms
HTML size
106 KB
Redirect chain
https://zerossl.com

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Frequently asked questions

What technology does zerossl.com use?
zerossl.com is built with Google Analytics, Plausible Analytics.
Is zerossl.com secure (HTTPS)?
Yes. zerossl.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 21, 2026.
Who hosts zerossl.com?
Hosting provider information for zerossl.com is not available yet.
What is zerossl.com's SEO score?
zerossl.com scored 80/100 for SEO in the latest analysis (great).
What is zerossl.com's overall website score?
zerossl.com has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.