What technology does readthedocs.io use?

We did not detect any specific technologies for readthedocs.io in the latest scan.

Is readthedocs.io secure (HTTPS)?

Yes. readthedocs.io uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 3, 2026.

Who hosts readthedocs.io?

Hosting provider information for readthedocs.io is not available yet.

What is readthedocs.io's SEO score?

readthedocs.io scored 65/100 for SEO in the latest analysis (fair).

What is readthedocs.io's overall website score?

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

Has readthedocs.io's score changed over time?

readthedocs.io's overall score has declined by 1 point (from 83 to 82) since Jul 15, 2026.

readthedocs.io

Full featured documentation deployment platform - Read the Docs

Last scanned Jul 29, 2026, 11:00 AM · 10 views

Overall score

Great

Summary

Read the Docs is a documentation building and hosting platform aimed at helping developers creating documentation from code with versioned documentation, integrated search, pull request previews and more. SEO is fair (65/100) and accessibility is excellent (100/100). Security scores fair (70/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.

Top issues to fix

10 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-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Title longer than 60 characters
SEO
Shorten the title to under 60 characters so search results don't truncate it.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.

+4 more issues — details in the sections below.

SEO

6 issue(s) found

100

Performance

357 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-1 overall since Jul 15, 2026

Overall: 82
SEO: 65
Security: 70
Performance: 100
Accessibility: 100

Organization

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

GitHub X (Twitter)

Meta tags

Title: Full featured documentation deployment platform - Read the Docs
Description: Read the Docs is a documentation building and hosting platform aimed at helping developers creating documentation from code with versioned documentation, integrated search, pull request previews and more.
Canonical
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: Cloudflare
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: Google Trust Services
Subject: about.readthedocs.com
Valid from: Jul 5, 2026
Valid to: Oct 3, 2026
Days until expiry: 65
SAN domains: about.readthedocs.com

Security headers

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

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 1 · H2 5 · H3 8

Links

15 internal · 23 external · 20 broken

Images

11 total · 0 missing alt

Scripts / Styles

4 scripts · 1 stylesheets

JS / CSS size

0 B · 0 B

Page size

34.0 KB

Robots.txt & Sitemap

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

SEO issues

Title longer than 60 characters
Meta description longer than 160 characters
Missing canonical link
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://readthedocs.io
Final URL: https://about.readthedocs.com/?ref=app.readthedocs.org
HTTP status: 200
HTTP version: HTTP/2
Response time: 357 ms
HTML size: 34.0 KB
Redirect chain: https://readthedocs.io → https://readthedocs.org → https://app.readthedocs.org/welcome/ → https://about.readthedocs.com/?ref=app.readthedocs.org

See something wrong on this report? Request a correction

Frequently asked questions

What technology does readthedocs.io use?: We did not detect any specific technologies for readthedocs.io in the latest scan.
Is readthedocs.io secure (HTTPS)?: Yes. readthedocs.io uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 3, 2026.
Who hosts readthedocs.io?: Hosting provider information for readthedocs.io is not available yet.
What is readthedocs.io's SEO score?: readthedocs.io scored 65/100 for SEO in the latest analysis (fair).
What is readthedocs.io's overall website score?: readthedocs.io has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
Has readthedocs.io's score changed over time?: readthedocs.io's overall score has declined by 1 point (from 83 to 82) since Jul 15, 2026.