Sudoku Solver
Paste a 9×9 grid; use 0 or . for blanks. Backtracking solver.
About this tool
Sudoku Solver is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Word & Puzzle Games. Browse more Word & Puzzle Games tools.