CageDokuFree Killer Sudoku Widget for Your Website
By Andrew Boyko, developer of CageDoku · Updated
Add a daily Killer Sudoku to your blog, school site or puzzle club page with one line of HTML. It is free, has no ads and no tracking, and a new puzzle appears every day.
Live preview
Copy this code
Paste it where you want the puzzle to appear:
<iframe src="https://killersudoku.andrewboyko.name/embed/" width="400" height="560" style="border:0;max-width:100%" loading="lazy" title="Daily Killer Sudoku by CageDoku"></iframe>Options
- 6×6 puzzle: add
?size=microto the address (suggested height 460). - Dark theme: add
?theme=dark. - Both:
?size=micro&theme=dark.
<iframe src="https://killersudoku.andrewboyko.name/embed/?size=micro" width="400" height="460" style="border:0;max-width:100%" loading="lazy" title="Daily 6x6 Sudoku by CageDoku"></iframe>Good to know
- Visitors can show the solution and open the puzzle in the free CageDoku app.
- The widget sets no cookies and sends no analytics.
- Please keep the “Powered by CageDoku” link; it is how the widget stays free.
Questions or ideas? Write to support@killersudoku.andrewboyko.name.
Frequently asked questions
Is the widget free?
Yes. It is free for personal, school, club and blog sites. Please keep the small “Powered by CageDoku” link.
Does it track my visitors?
No. The widget uses no cookies, no analytics and no ads. It only loads the puzzle data from this site.
Does the puzzle change every day?
Yes. The widget shows the puzzle of the day, the same one as in the CageDoku app and on the daily Killer Sudoku page.
Can I choose a 6×6 puzzle or a dark theme?
Yes. Add ?size=micro for the 6×6 puzzle and ?theme=dark for a dark background.