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sudoku.name

Sudoku - Play, Print & Share Free Sudoku Online puzzles

Last scanned Aug 24, 2026, 1:23 PM

71

Overall score

Fair

Summary

Play Sudoku online for free. This website uses Apache. SEO is good (80/100) and accessibility is fair (60/100). Security scores fair (65/100) and performance good (75/100). Top issue: Missing canonical link.

Play Sudoku online for free. 4 difficulty levels. Unlimited puzzles to choose from. Print, share, get statistics and meet other players. Play Sudoku Now!

Top issues to fix

10 issues found · 3 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • 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.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • 4 cookies without Secure/HttpOnly flags

    Security

    Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

+4 more issues — details in the sections below.

80

SEO

3 issue(s) found

75

Performance

750 ms

65

Security

HTTPS & header checks

60

Accessibility

2 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.

Play Sudoku online for free. 4 difficulty levels. Unlimited puzzles to choose from. Print, share, get statistics and meet other players. Play Sudoku Now!

X (Twitter)

Contact

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

Meta tags

Title
Sudoku - Play, Print & Share Free Sudoku Online puzzles
Description
Play Sudoku online for free. 4 difficulty levels. Unlimited puzzles to choose from. Print, share, get statistics and meet other players. Play Sudoku Now!
Canonical
Language
Charset
utf-8
Viewport
initial-scale=1.0, user-scalable=no
Robots meta
Manifest
https://www.sudoku.name/new-manifest.php?ln=en&name=Play+Sudoku+online+for+free.+4+difficulty+levels.+Unlimited+puzzles+to+choose+from.+Print%2C+share%2C+get+statistics+and+meet+other+players.+Play+Sudoku+Now%21&short_name=Sudoku&platform=desktop

OpenGraph & Twitter Card

OpenGraph

og:title
Sudoku - Play, Print & Share Free Sudoku Online puzzles
og:description
—
og:type
—
og:url
http://www.sudoku.name/

Twitter Card

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

Technologies

Detected frameworks, languages, and tools.

Google AnalyticsGoogle AdsMeta PixelApache

Hosting & CDN

Hosting provider
—
CDN provider
—
IP address
163.245.196.202
ASN
—

DNS records

TypeValue
A
  • 163.245.196.202
AAAA—
MX
  • sudoku.name
TXT—
NS
  • ns13.dnsmadeeasy.com
  • ns12.dnsmadeeasy.com
  • ns1.sudoku.name
  • ns14.dnsmadeeasy.com
  • ns11.dnsmadeeasy.com
  • ns15.dnsmadeeasy.com
  • ns10.dnsmadeeasy.com
  • ns2.sudoku.name
CAA—
CNAME
  • sudoku.name
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
www.sudoku.name
Valid from
Jul 2, 2026
Valid to
Sep 30, 2026
Days until expiry
35
SAN domains
autoconfig.sudoku.name, autodiscover.sudoku.name, cpanel.sudoku.name, cpcalendars.sudoku.name, cpcontacts.sudoku.name, mail.sudoku.name, sudoku.name, webdisk.sudoku.name, webmail.sudoku.name, www.sudoku.name

Security headers

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

Compression: gzip · 4 cookie(s) observed

Content & assets

Headings

H1 1 · H2 4 · H3 0

Links

31 internal · 3 external · 0 broken

Images

101 total · 66 missing alt

Scripts / Styles

18 scripts · 0 stylesheets

JS / CSS size

1.9 MB · 11.6 KB

Page size

150 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
5
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing canonical link
  • No structured data (JSON-LD) found
  • sitemap.xml not found

Accessibility issues

  • Over half of images are missing alt text
  • Missing <html lang> attribute

Scan details

Requested URL
https://sudoku.name
Final URL
https://www.sudoku.name/
HTTP status
200
HTTP version
HTTP/2
Response time
747 ms
HTML size
150 KB
Redirect chain
https://sudoku.name → https://www.sudoku.name/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does sudoku.name use?
sudoku.name is built with Google Analytics, Google Ads, Meta Pixel, Apache.
Is sudoku.name secure (HTTPS)?
Yes. sudoku.name uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 30, 2026.
Who hosts sudoku.name?
Hosting provider information for sudoku.name is not available yet.
What is sudoku.name's SEO score?
sudoku.name scored 80/100 for SEO in the latest analysis (great).
What is sudoku.name's overall website score?
sudoku.name has an overall SiteGraph score of 71/100, combining SEO, performance, security, and accessibility.