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Domain report

readwise.io

readwise.io ranks in the top 0.010% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 18 distinct hosts observed under it.

Explore readwise.io in the Web Graph

Connectivity

#13,884harmonic-centrality rank
Top percentile
0.010%
Hosts observed
18

From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means

HTTPS reachability

200HTTP status

https://readwise.io/ answered with HTTP 200.

DNS records

A
  • 104.26.8.37
  • 172.67.69.113
  • 104.26.9.37
AAAA
  • 2606:4700:20::681a:925
  • 2606:4700:20::681a:825
  • 2606:4700:20::ac43:4571
MX
  • 1 aspmx.l.google.com.
  • 10 aspmx2.googlemail.com.
  • 10 aspmx3.googlemail.com.
  • 5 alt1.aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
NS
  • cory.ns.cloudflare.com.
  • ines.ns.cloudflare.com.

Live preview

Screenshot of readwise.io

This site sends "X-Frame-Options: DENY", which blocks embedding it here.

Since readwise.io can't be embedded live, this is a captured screenshot instead — a snapshot from whenever it was last rendered, not necessarily this exact moment.

Domain registration (WHOIS / RDAP)

No RDAP (WHOIS) data is available for readwise.io.

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 429).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=utf-8
Cache-Control
Not sent
Content-Encoding
Not sent

Security

Content-Security-Policy
default-src 'self' https:; script-src 'self' 'unsafe-inline' 'unsafe-eval' https: blob:; style-src 'self' 'unsafe-inline' https:; font-src 'self' https: data:; img-src 'self' https: http: data: blob:; connect-src 'self' https: wss:; media-src 'self' https: blob:; frame-src 'self' https:; frame-ancestors 'self'; worker-src 'self' blob:; object-src 'self' https:; base-uri 'self'; form-action 'self' https:; upgrade-insecure-requests
Strict-Transport-Security
Not sent
X-Frame-Options
DENY
X-Content-Type-Options
nosniff
Referrer-Policy
same-origin
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://readwise.io/HTTP 301

    → https://readwise.io/

  2. 2.https://readwise.io/HTTP 200

Meta tags

Title
Readwise: Get the most out of what you read
Description
Easily revisit and learn from your highlights and annotations.
Canonical
https://readwise.io/
Robots
Not set
Generator
Not set
Open Graph title
Readwise: Get the most out of what you read
Open Graph description
Easily revisit and learn from your highlights and annotations.
Open Graph image
https://d34adp677peecb.cloudfront.net/static/images/landing2/share-card.2874a5b7ba41.jpg
Open Graph type
website
Twitter card
summary_large_image
Twitter title
Readwise: Get the most out of what you read
Twitter image
https://d34adp677peecb.cloudfront.net/static/images/landing2/share-card.2874a5b7ba41.jpg

robots.txt

Disallow rules (User-agent: *)
3
Disallow rules (other agents)
0

Sitemap declared:

  • https://readwise.io/sitemap.xml

Technology detected

Best-effort, based on a small set of well-known signals — this may be incomplete.

  • Cloudflarecdn

    Server: cloudflare

  • Google Tag Manageranalytics

    Found "googletagmanager.com/gtm.js" in the page's HTML

Related domains

Similar connectivity

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