readthedocs.io

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readthedocs.io is ranked #913 in the Tranco list of the world's most popular websites (list of Oct 13, 2026), down 15 places in four weeks. The domain was registered on Jun 14, 2014, 12 years, 3 months ago, through Cloudflare, Inc, and is paid up until Jun 14, 2028. Its homepage uses Font Awesome. It is served through Cloudflare.

Global rank

#913

▲ 7 this week

Domain age

12 years

since Jun 14, 2014

Technologies

detected on the homepage

SEO score

83/100

homepage checks

Popularity rank

#913 of the top 1 million sites in the Tranco research ranking, which averages several traffic and DNS sources over 30 days. Best rank in the period shown: #824.

Weekly Tranco rank (lower is more popular).

See where readthedocs.io sits in the top 10,000

Domain registration

Registered: Jun 14, 2014 (12 years, 3 months ago)
Expires: Jun 14, 2028
Registrar: Cloudflare, Inc
Name servers: ivan.ns.cloudflare.com, tegan.ns.cloudflare.com
DNSSEC: Not signed

From the registry's public RDAP record, checked Oct 1, 2026.

Technology stack

UI frameworks & fonts

Font Awesome

CDN

Cloudflare

Detected from the homepage HTML and response headers on Oct 14, 2026. Tools loaded only after scripts run (or after consent banners) may be missing.

Homepage SEO check

Checked from the HTML our scanner received on Oct 14, 2026. Content added later by JavaScript isn't counted.

83/100

https://about.readthedocs.com/?ref=app.readthedocs.org

Full featured documentation deployment platform - Read the Docs

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.

15 passed · 8 warnings · 0 failed

Content

✓Title63 characters
!Meta description204 characters — aim for 50–170
✓H1 headingExactly one H1
✓Subheadings5 H2 headings
✓Image alt textAll 11 images have alt text
✓Content lengthAbout 738 words

Indexing

✓IndexableNo noindex directive
!Canonical URLMissing
!robots.txtNot found
✓XML sitemapFound
✓Language attributeen
!Structured dataNo JSON-LD or microdata

Social sharing

✓Open GraphTitle, description and image set
!Twitter / X cardMissing

Technical

✓HTTPSServed over HTTPS
✓Mobile viewportFound
✓FaviconFound
✓Character encodingutf-8

Security headers

!Strict-Transport-SecurityNot set
!Content-Security-PolicyNot set
!Clickjacking protectionNot set
✓X-Content-Type-OptionsSet
✓Referrer-PolicySet

Server response

Final URL: https://about.readthedocs.com/?ref=app.readthedocs.org
HTTP status: 200
Server: cloudflare
Response time: 129 ms (first byte 129 ms, from our scanner in a US data centre)
HTML size: 33 KB
Compression: gzip

Sites ranked near readthedocs.io

Rank	Website	Registered	Built with
#908	arcgis.com	1999	Amazon CloudFront
#909	princeton.edu	—	Cloudflare
#910	fwmrm.net	2007	WordPress, WP Engine, cdnjs
#911	dnse2.com	2022	—
#912	buydomains.com	1997	Cloudflare
#914	wyzecam.com	2017	Shopify, Cloudflare, Google Tag Manager
#915	daum.net	1996	Google Ad Manager, Google AdSense
#916	coupang.com	2010	Akamai
#917	mayoclinic.org	1997	Akamai
#918	it.com	1992	Cloudflare

Questions about readthedocs.io

How popular is readthedocs.io?

readthedocs.io is #913 worldwide in the Tranco list published Oct 13, 2026.

How old is readthedocs.io?

readthedocs.io was registered on Jun 14, 2014, which makes the domain 12 years, 3 months old.

What is readthedocs.io built with?

We detected Font Awesome and Cloudflare on its homepage.

Who is the registrar of readthedocs.io?

Cloudflare, Inc, according to the registry's RDAP record.