Frequently Asked Questions
Is Daily Sudoku free?
Yes, every puzzle on the site is completely free, with no signup required.
How many difficulty levels are there?
Five: very easy, easy, medium, hard, and very hard.
Are puzzles guaranteed to have one solution?
Yes. Every puzzle is checked at generation time to ensure exactly one solution.
Can I print puzzles?
Yes. Every puzzle page has a print link and a downloadable PDF.
Do you store my progress?
Your in-progress puzzle is saved in your browser via localStorage. Nothing is sent to our servers.