Free Sudoku online: play every day

Play Sudoku online for free

Start a free Sudoku game in your browser.

How to play Sudoku online

Fill the 9 × 9 grid so every row, column, and 3 × 3 box contains the numbers one through nine without repeats. Scan the most complete units first, write candidate notes when a move is not obvious, and check all three connected units before placing a number.

PIENSALIA keeps the first step simple: choose a board, tap or type a number, and use related cells as a visual guide. You can play Sudoku online with touch controls, a keyboard, or a mouse, then return to the same local game.

Choose your Sudoku level

Today’s daily Sudoku challenge

The daily Sudoku challenge uses a stable UTC date and difficulty, so everyone receives the same board for that day. Solve at your own pace, return tomorrow for a new puzzle, and keep your result locally without creating an account. Try the random challenge when you want a different board and a timed session.

Daily Sudoku challenge or Play Sudoku online.

Why solve Sudoku?

Sudoku is a quiet way to practise attention, working memory, and logical elimination. The goal is not fast guessing: it is making reliable decisions from the information already on the board. Short games fit into a break, while harder levels reward a patient solving routine.

Frequently asked questions

Is PIENSALIA free?

Yes. You can play free Sudoku in the browser without registering.

Can I play on a phone?

Yes. The board and number controls adapt to phones, tablets, and desktop screens.

What level should I choose?

Easy Sudoku is a gentle start, medium Sudoku adds candidate work, and hard Sudoku is for more experienced solvers.

Is the daily board the same for everyone?

Yes. The daily challenge is based on the UTC date and selected difficulty.