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rdrr.io

R Package Documentation

Last scanned Jul 26, 2026, 5:47 AM

87

Overall score

Great

Summary

A comprehensive index of R packages and documentation from CRAN, Bioconductor, GitHub and R-Forge. This website uses Google Analytics. SEO is excellent (90/100) and accessibility is fair (70/100). Security scores good (85/100) and performance excellent (100/100). Top issue: robots.txt not found.

R Package Documentation

A comprehensive index of R packages and documentation from CRAN, Bioconductor, GitHub and R-Forge.

Top issues to fix

6 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.

  • Over half of images are missing alt text

    Accessibility

    Add alt attributes to images — screen readers depend on them, and they help image SEO.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • 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 broken link on the page

    SEO

    Fix or remove broken links — they waste crawl budget and erode user trust.

90

SEO

2 issue(s) found

100

Performance

113 ms

85

Security

HTTPS & header checks

70

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.

R Package Documentation

A comprehensive index of R packages and documentation from CRAN, Bioconductor, GitHub and R-Forge.

X (Twitter)

Contact

Email, phone, and address published on this site's own pages.

Meta tags

Title
R Package Documentation
Description
A comprehensive index of R packages and documentation from CRAN, Bioconductor, GitHub and R-Forge.
Canonical
https://rdrr.io/
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1, minimum-scale=1
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
R Package Documentation
og:description
A comprehensive index of R packages and documentation from CRAN, Bioconductor, GitHub and R-Forge.
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Google AnalyticsGoogle Ads

Hosting & CDN

Hosting provider
—
CDN provider
—
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
rdrr.io
Valid from
Jul 10, 2026
Valid to
Oct 8, 2026
Days until expiry
71
SAN domains
*.ext.rdrr.io, *.proxy.rdrr.io, *.rdrr.io, *.svc.rdrr.io, rdrr.io

Security headers

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

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 5 · H3 0

Links

17 internal · 4 external · 1 broken

Images

1 total · 1 missing alt

Scripts / Styles

8 scripts · 4 stylesheets

JS / CSS size

153 B · 0 B

Page size

13.7 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

Accessibility issues

  • Over half of images are missing alt text

Scan details

Requested URL
https://rdrr.io
Final URL
https://rdrr.io
HTTP status
200
HTTP version
HTTP/2
Response time
113 ms
HTML size
13.7 KB
Redirect chain
https://rdrr.io

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Frequently asked questions

What technology does rdrr.io use?
rdrr.io is built with Google Analytics, Google Ads.
Is rdrr.io secure (HTTPS)?
Yes. rdrr.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 8, 2026.
Who hosts rdrr.io?
Hosting provider information for rdrr.io is not available yet.
What is rdrr.io's SEO score?
rdrr.io scored 90/100 for SEO in the latest analysis (excellent).
What is rdrr.io's overall website score?
rdrr.io has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.
What company operates rdrr.io?
rdrr.io is operated by R Package Documentation. A comprehensive index of R packages and documentation from CRAN, Bioconductor, GitHub and R-Forge.