Online Sudoku Solver with Step-by-Step Guidance
This free Sudoku solver helps you solve standard 9x9 puzzles in your browser. Enter digits manually, upload a puzzle photo, get the next logical move, or solve the full board instantly.
Import from a puzzle photo (coming soon)
Upload a clear, front-facing image of your Sudoku grid and the app will detect numbers automatically so you can continue solving from your current position.
Learn with next-step hints (coming soon)
Use the next-step button to fill one cell at a time with a short reason, making it easier to understand the move instead of only seeing the final answer.
Instant full solve when you need it
When you are stuck, run a complete solve to finish the board and verify whether your puzzle has a valid solution.