What technology does semver.org use?

We did not detect any specific technologies for semver.org in the latest scan.

Is semver.org secure (HTTPS)?

Yes. semver.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 17, 2026.

Who hosts semver.org?

Hosting provider information for semver.org is not available yet.

What is semver.org's SEO score?

semver.org scored 90/100 for SEO in the latest analysis (excellent).

What is semver.org's overall website score?

semver.org has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.

Has semver.org's score changed over time?

semver.org's overall score has declined by 3 points (from 91 to 88) since Jul 25, 2026.

semver.org

Semantic Versioning 2.0.0 | Semantic Versioning

Last scanned Aug 1, 2026, 3:00 PM · 19 views

Overall score

Great

Summary

Semantic Versioning spec and website. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: robots.txt not found.

Semantic Versioning spec and website

Top issues to fix

7 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.
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.
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.

+1 more issue — details in the sections below.

SEO

2 issue(s) found

100

Performance

3 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-3 overall since Jul 25, 2026

Overall: 88
SEO: 90
Security: 65
Performance: 100
Accessibility: 100

Organization

Company details published in this site's own structured data.

Semantic Versioning spec and website

Meta tags

Title: Semantic Versioning 2.0.0 | Semantic Versioning
Description: Semantic Versioning spec and website
Canonical: https://semver.org/
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

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: semver.org
Valid from: Jun 19, 2026
Valid to: Sep 17, 2026
Days until expiry: 46
SAN domains: semver.org, www.semver.org

Security headers

Strict-Transport-SecurityMissing
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 8 · H3 12

Links

43 internal · 6 external · 20 broken

Images

0 total · 0 missing alt

Scripts / Styles

1 scripts · 1 stylesheets

JS / CSS size

0 B · 0 B

Page size

30.4 KB

Robots.txt & Sitemap

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

SEO issues

robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://semver.org
Final URL: https://semver.org
HTTP status: 200
HTTP version: HTTP/2
Response time: 3 ms
HTML size: 30.4 KB
Redirect chain: https://semver.org

See something wrong on this report? Request a correction

Frequently asked questions

What technology does semver.org use?: We did not detect any specific technologies for semver.org in the latest scan.
Is semver.org secure (HTTPS)?: Yes. semver.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 17, 2026.
Who hosts semver.org?: Hosting provider information for semver.org is not available yet.
What is semver.org's SEO score?: semver.org scored 90/100 for SEO in the latest analysis (excellent).
What is semver.org's overall website score?: semver.org has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.
Has semver.org's score changed over time?: semver.org's overall score has declined by 3 points (from 91 to 88) since Jul 25, 2026.