What technology does dnscheck.tools use?

dnscheck.tools is built with Nginx.

Is dnscheck.tools secure (HTTPS)?

Yes. dnscheck.tools uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 20, 2026.

Who hosts dnscheck.tools?

Hosting provider information for dnscheck.tools is not available yet.

What is dnscheck.tools's SEO score?

dnscheck.tools scored 70/100 for SEO in the latest analysis (fair).

What is dnscheck.tools's overall website score?

dnscheck.tools has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.

dnscheck.tools

dnscheck.tools - check your dns resolvers

Last scanned Jul 26, 2026, 5:47 AM

Overall score

Great

Summary

A tool to test for DNS leaks, DNSSEC validation, and more. This website uses Nginx. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (90/100). Top issue: Missing canonical link.

A tool to test for DNS leaks, DNSSEC validation, and more

Top issues to fix

9 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.
Missing OpenGraph tags
SEO
Add og:title/og:description/og:image so shared links render a proper preview card.

+3 more issues — details in the sections below.

SEO

5 issue(s) found

Performance

1.40 s

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.

A tool to test for DNS leaks, DNSSEC validation, and more

Meta tags

Title: dnscheck.tools - check your dns resolvers
Description: A tool to test for DNS leaks, DNSSEC validation, and more
Canonical
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1, viewport-fit=cover
Robots meta
Manifest: https://dnscheck.tools/site.webmanifest

Technologies

Detected frameworks, languages, and tools.

Nginx

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: dnscheck.tools
Valid from: Jul 22, 2026
Valid to: Oct 20, 2026
Days until expiry: 84
SAN domains: *.dnscheck.tools, *.go.dnscheck.tools, *.test-alg13-ipv4.dnscheck.tools, *.test-alg13-ipv6.dnscheck.tools, *.test-alg13.dnscheck.tools, *.test-alg14-ipv4.dnscheck.tools, *.test-alg14-ipv6.dnscheck.tools, *.test-alg14.dnscheck.tools, *.test-alg15-ipv4.dnscheck.tools, *.test-alg15-ipv6.dnscheck.tools, *.test-alg15.dnscheck.tools, *.test-ipv4.dnscheck.tools, *.test-ipv6.dnscheck.tools, *.test.dnscheck.tools, dnscheck.tools

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 0 · H3 0

Links

2 internal · 3 external · 5 broken

Images

0 total · 0 missing alt

Scripts / Styles

1 scripts · 1 stylesheets

JS / CSS size

0 B · 0 B

Page size

2.3 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
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://dnscheck.tools
Final URL: https://dnscheck.tools
HTTP status: 200
HTTP version: HTTP/2
Response time: 1.40 s
HTML size: 2.3 KB
Redirect chain: https://dnscheck.tools

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Frequently asked questions

What technology does dnscheck.tools use?: dnscheck.tools is built with Nginx.
Is dnscheck.tools secure (HTTPS)?: Yes. dnscheck.tools uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 20, 2026.
Who hosts dnscheck.tools?: Hosting provider information for dnscheck.tools is not available yet.
What is dnscheck.tools's SEO score?: dnscheck.tools scored 70/100 for SEO in the latest analysis (fair).
What is dnscheck.tools's overall website score?: dnscheck.tools has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.