indexo.dev

sudokus.io

.io crawl

First seen 2026-05-30 · Last seen 2026-05-30 · ok HTTP/1.1 200 531 ms crawled 2026-05-31

US · 172.66.40.72 · AS13335 Cloudflare, Inc.

Reputation 100/100

Classifying

HTML metadata

Title
Play Sudoku Online for Free - sudokus.io
Description
Play Sudoku online for free from Easy to Expert level on sudokus.io. Choose a difficulty level to challenge yourself.
Language
en
Translations
  • ar
  • de
  • en
  • es
  • fr
  • ja
  • ru

Open Graph

url
https://sudokus.io/
title
Play Sudoku Online for Free - sudokus.io
locale
en_US
site name
sudokus.io
description
Play Sudoku online for free from Easy to Expert level on sudokus.io. Choose a difficulty level to challenge yourself.

Technology

CDN
Cloudflare
Analytics
  • Cloudflare Insights
  • Google Tag Manager

Third-party hosts loaded (4)

  • res.cloudinary.com×4
  • www.googletagmanager.com×2
  • cdnjs.cloudflare.com×1
  • static.cloudflareinsights.com×1

DNS records live

NS
  • edna.ns.cloudflare.com
  • randy.ns.cloudflare.com
Verified for
  • Google

Email authentication no MX

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-04-28 to 2026-07-27
Expires in 56 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 60/100 Checked live page: https://sudokus.io/

present
  • strict-transport-security
  • content-security-policy
findings
  • short HSTS max-age
  • CSP uses wildcard sources
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
content-security-policy
frame-ancestors 'self' https://itch.io https://*.itch.io https://itch.zone https://*.itch.zone https://static.itch.io https://*.hwcdn.net
strict-transport-security
max-age=2592000

Links to (1)

Linked from (1)