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.