dailykillersudoku.com
Daily Killer Sudoku
Last scanned Aug 24, 2026, 1:23 PM
Overall score
Great
Summary
Free Killer Sudoku every day for your desktop, tablet, phone or to print! Interactive online play. This website uses Google Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is good (80/100) and accessibility is fair (70/100). Security scores excellent (90/100) and performance good (85/100). Top issue: Missing canonical link.
Free Killer Sudoku every day for your desktop, tablet, phone or to print! Interactive online play. Thousands of past puzzles to choose from.
- United States
- Hosted on Cloudflare
Top issues to fix
5 issues found · 2 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
SEO
3 issue(s) found
Performance
618 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Free Killer Sudoku every day for your desktop, tablet, phone or to print! Interactive online play. Thousands of past puzzles to choose from.
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- Daily Killer Sudoku
- Description
- Free Killer Sudoku every day for your desktop, tablet, phone or to print! Interactive online play. Thousands of past puzzles to choose from.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- height=device-height, width=device-width, initial-scale=1, shrink-to-fit=no
- Robots meta
- Manifest
- https://www.dailykillersudoku.com/manifest.json?v=rMlWP7aazo
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 172.67.209.36
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- dailykillersudoku.com
- Valid from
- Aug 8, 2026
- Valid to
- Nov 6, 2026
- Days until expiry
- 72
- SAN domains
- dailykillersudoku.com, *.dailykillersudoku.com, staging.dailykillersudoku.com, *.staging.dailykillersudoku.com
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 2 · H3 2
Links
28 internal · 2 external · 0 broken
Images
1 total · 1 missing alt
Scripts / Styles
31 scripts · 1 stylesheets
JS / CSS size
2.2 MB · 17.2 KB
Page size
24.0 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- 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
Scan details
- Requested URL
- https://dailykillersudoku.com
- Final URL
- https://www.dailykillersudoku.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 618 ms
- HTML size
- 24.0 KB
- Redirect chain
- https://dailykillersudoku.com → https://www.dailykillersudoku.com/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does dailykillersudoku.com use?
- dailykillersudoku.com is built with Ruby on Rails, Google Analytics, Cloudflare Analytics, Google Ads.
- Is dailykillersudoku.com secure (HTTPS)?
- Yes. dailykillersudoku.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Nov 6, 2026.
- Who hosts dailykillersudoku.com?
- dailykillersudoku.com is hosted on Cloudflare, behind Cloudflare CDN.
- What is dailykillersudoku.com's SEO score?
- dailykillersudoku.com scored 80/100 for SEO in the latest analysis (great).
- What is dailykillersudoku.com's overall website score?
- dailykillersudoku.com has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card