What technology does musictheory.net use?

musictheory.net is built with Nginx.

Is musictheory.net secure (HTTPS)?

Yes. musictheory.net uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 23, 2026.

Who hosts musictheory.net?

Hosting provider information for musictheory.net is not available yet.

What is musictheory.net's SEO score?

musictheory.net scored 65/100 for SEO in the latest analysis (fair).

What is musictheory.net's overall website score?

musictheory.net has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.

musictheory.net

Last scanned Jul 26, 2026, 12:49 PM

Overall score

Great

Summary

Introductory and intermediate music theory lessons, exercises, ear trainers, and calculators. This website uses Nginx. SEO is fair (65/100) and accessibility is excellent (90/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Missing canonical link.

Introductory and intermediate music theory lessons, exercises, ear trainers, and calculators.

Top issues to fix

8 issues found · 2 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
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

5 issue(s) found

100

Performance

466 ms

Security

HTTPS & header checks

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.

Introductory and intermediate music theory lessons, exercises, ear trainers, and calculators.

Meta tags

Title: musictheory.net
Description: Introductory and intermediate music theory lessons, exercises, ear trainers, and calculators.
Canonical
Language: en
Charset: utf-8
Viewport: width=540
Robots meta: noodp,noydir
Manifest

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: musictheory.net
Valid from: Jul 25, 2026
Valid to: Oct 23, 2026
Days until expiry: 86
SAN domains: musictheory.net, www.musictheory.net

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsEnabled
Referrer-PolicyEnabled
Permissions-PolicyEnabled

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

12 internal · 0 external · 12 broken

Images

4 total · 0 missing alt

Scripts / Styles

2 scripts · 1 stylesheets

JS / CSS size

125 B · 0 B

Page size

5.3 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 H1 heading found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://musictheory.net
Final URL: https://www.musictheory.net/
HTTP status: 200
HTTP version: HTTP/2
Response time: 466 ms
HTML size: 5.3 KB
Redirect chain: https://musictheory.net → https://www.musictheory.net/

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