No account needed
You don't have to register anywhere or leave an email address. Open the page, pick a level, and start puzzling.
Play free killer sudoku
Playing killer sudoku doesn't have to cost anything. On BreinPlezier you play as many killers as you like — four levels, cages with sum labels, hints and error checking — completely free, without an account and without any catches.
What free really means here
All levels, including Expert
Nothing sits behind a paywall: from Easy with starting digits to Expert with an almost empty grid — everything is freely accessible.
Hints and error checking included
The helpers are free too: a hint fills in a correct digit and the error check even looks at your cages. No penalty, no limit.
Unlimited puzzling
There is no daily maximum and no countdown clock. Every new puzzle is freshly generated for you, guaranteed to have one solution.
Choose where you want to begin
Play right away
Pick your level and start immediately. Your board is saved automatically, so you can always stop and continue later.
Play killer sudokuToday's killer
One shared killer every day, the same for everyone. Build a streak for free and keep it going.
Daily Killer SudokuThe rules first
New to killer sudoku? First read in plain language how the cages and sums work.
Killer sudoku rulesFrequently asked questions about free killer sudoku
Is killer sudoku on BreinPlezier really completely free?
Yes. All puzzles, levels, and helpers are free. There is no trial period, no premium version, and no paywall.
Do I need to create an account?
No. You play directly in your browser, without registration. Your progress is saved on your own device, not on a server.
Is there a limit on the number of puzzles?
No. You can play as many killers as you like, at any level. Every puzzle is generated fresh, so the supply never runs out.
Will it stay free?
Yes, the puzzles will remain free. BreinPlezier exists to give your brain a daily puzzle — accessible and without obligations.
Not sure whether killer sudoku is for you? The rules and solving tips explain how it works in five minutes — trying it costs literally nothing.