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readthedocs.io

Category: Information Technology

Scanned: May 13, 2026, 10:33 PM UTC · First seen: May 13, 2026 · Threat Engines: 0 / 92 · Times Scanned: 1
96 / 100 Trust Score Based on scan findings at the time of analysis
No Threats Found
0 - High Risk50 - Moderate100 - No Threats
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Screenshot of readthedocs.io Captured May 13, 2026
https://readthedocs.io
Screenshot of readthedocs.io
11 years
Extremely Popular - #964 Tranco rank (>100M monthly visitors)
Not listed (92 checked)
✓ Valid (TLS)
Cloudflare, Inc.
Toronto, Canada
cloudflare
Pelican
104.16.254.120
Domain & WHOIS Information
Registrar Cloudflare, Inc.
Registered June 14, 2014
Expires June 14, 2028
Name Servers ivan.ns.cloudflare.com
DNSSEC Unsigned
Hosting Cloudflare, Inc.
Reputation & Threat Check 92 security engines checked
File Scan Summary Powered by Quttera Engine
99 files scanned
No threats
98
Low Risk
1
Medium Risk
0
High Risk
0
No threats Low Risk Medium Risk High Risk
/index Flagged: low risk
kit.fontawesome.com/53af4251af.js 22 B No threats
about.readthedocs.com/?ref=app.readthedocs.org 35.7 KB No threats
about.readthedocs.com/# 35.7 KB No threats
about.readthedocs.com/?ref=app.readthedocs.org.http-redirect 115 B No threats
about.readthedocs.com/images/netlify-logo.svg 3.6 KB No threats
about.readthedocs.com/images/gitbook-logo.svg 5.7 KB No threats
about.readthedocs.com/images/github-logo.svg 8.7 KB No threats
about.readthedocs.com/images/canonical-logo.svg 7.5 KB No threats
about.readthedocs.com/images/readme-logo.svg 7.4 KB No threats
about.readthedocs.com/images/anaconda-logo.svg 13.9 KB No threats
Show 88 more...
Quttera flagged low risk files - is this your website?
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External Links & Domains
348
External Links
All Clean
1
Iframes
Clean
50
Referenced Domains
All Clean
0
Flagged Resources
None Detected
http://readthedocs.io/./#/businessNot flagged
http://readthedocs.io/./#/business/advancedNot flagged
http://readthedocs.io/./#/business/basicNot flagged
http://readthedocs.io/./#/business/proNot flagged
http://readthedocs.io/./#/communityNot flagged
http://readthedocs.io/./#compareNot flagged
http://readthedocs.io/./enterprise/Not flagged
http://readthedocs.io/_/static/javascript/readthedocs-addons.jsNot flagged
http://readthedocs.io/blog/Not flagged
http://readthedocs.io/blog/2023/03/website-migration/Not flagged
http://readthedocs.io/blog/2024/02/drop-support-for-subversion-mercurial-bazaar/Not flagged
http://readthedocs.io/blog/2024/03/mkdocs-yaml-manipulation/Not flagged
http://readthedocs.io/blog/2024/03/read-the-docs-loves-ruby/Not flagged
http://readthedocs.io/blog/2024/04/enable-beta-addons/Not flagged
http://readthedocs.io/blog/2024/05/readme-html-deprecated/Not flagged
Show 333 more...
about.readthedocs.comNot flagged
about.readthedocs.orgNot flagged
agentskills.ioNot flagged
app.readthedocs.comNot flagged
app.readthedocs.orgNot flagged
avatars.githubusercontent.comNot flagged
aws.amazon.comNot flagged
blog.readthedocs.comNot flagged
brand-guidelines.readthedocs.orgNot flagged
ddev.readthedocs.ioNot flagged
dev.readthedocs.ioNot flagged
devguide.python.orgNot flagged
docs.astral.shNot flagged
docs.gluster.orgNot flagged
docs.godotengine.orgNot flagged
Show 35 more...
<iframe width%3D"560" height%3D"315" src%3D"https://www.youtube-nocookie.com/embed/6p6LttjaSNM?si%3DVI9UYkG-Z8XNfwaq" title%3D"YouTube video player" frameborder%3D"0" allow%3D"accelerometer%3B autoplay%3B clipboard-write%3B encrypted-media%3B gyroscope%3B picture-in-picture%3B web-share" referrerpolicy%3D"strict-origin-when-cross-origin" allowfullscreen>Not flagged
readthedocs.io Overview

Description of readthedocs.io

readthedocs.io appears to be the main website for Read the Docs, a documentation building and hosting platform aimed at software developers and technical teams. Based on the page title, metadata, and visible homepage content, the service focuses on publishing versioned documentation, pull request previews, integrated search, and workflow features tied to Git-based development.

The site appears to be operated as a long-running technology platform rather than a temporary or single-purpose landing page. Its homepage presents product, pricing, and resource sections, along with business and community offerings, which is consistent with a mature software documentation service used by open-source projects and commercial teams. The domain category data also aligns with an information technology website.

Safety Assessment for readthedocs.io

The available scan results are broadly reassuring at the time of this scan. The domain was not flagged by any of 92 security engines, and the checked blacklist and threat-database sources reported clean status. The domain is also well established, with an age of more than 11 years, and it has a strong web presence indicated by a high Tranco ranking.

One malware scan did mark the /index page as "potentially suspicious," but no malware family or specific threat name was identified, and that signal was not corroborated by other scanners or blacklist data. In context, this appears to be a low-confidence heuristic finding rather than strong evidence of compromise. The visible site content also matches a legitimate documentation platform and does not show common phishing, scam, or malware-delivery patterns.

Based on available data, no threats were detected at the time of this scan, aside from a single low-confidence heuristic alert that does not appear to be supported by broader scan consensus.

Technical Description

The site uses a valid SSL/TLS certificate issued by Google Trust Services, with expiry shown as 2026-06-29, and it is served through Cloudflare infrastructure. The resolved server IP is 104.16.254.120, with hosting geolocated to Toronto, Canada in the scan data. Nameservers are on Cloudflare, which is consistent with use of a CDN and reverse-proxy setup.

DNSSEC appears to be unsigned, which is not uncommon but does mean DNS responses may lack that additional layer of authenticity protection. No major transport-security issues were provided in the scan results, and the infrastructure profile appears consistent with a professionally operated high-traffic technology service.

HTTP Redirect Chain
302 https://readthedocs.io/
302 https://readthedocs.org/
302 https://app.readthedocs.org/welcome/
200 https://about.readthedocs.com/?ref=app.readthedocs.org
Website Insights
#964
Tranco Rank
Extremely Popular
Visitors >100M/mo
Category: Information Technology
Rank History (30 days)
Apr 6 May 12
6 cookies detected
Essential6
Analytics0
Advertising0
Social0
2 1st party cookies
4 3rd party (trackers)
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This report was generated automatically and is provided for informational purposes only. Results are based on a point-in-time scan and may contain false positives or incomplete data. This does not constitute a security audit or certification. No vendor in the market can guarantee a 100% detection rate. If you believe this report is inaccurate, please submit a dispute.

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