Sudoku Vault is a free Puzzle game you can play instantly in your browser, with no download and no registration. How to play: Use a mouse or touchpad to select a cell then choose a number from the on-screen number pad to fill it in Use the Note button to toggle pencil marks and tap Check to validate your entries mdash incorrect numbers are removed and correct ones are lock. It renders at 450 by 600 pixels and scales to your window. It joined SaGo Games on October 29, 2026. It is an HTML5 build, so it loads in any modern desktop or mobile browser.
Sudoku Vault is a logic-based puzzle game featuring 4x4, 6x6, and 9x9 boards — each with four difficulty levels: Basic, Normal, Hard, and Expert. Whether youre a beginner or an expert, every grid offers a fresh challenge for your mind. Use smart NOTES to keep track of possibilities, and when you want to check your progress, tap the CHECK button — it will remove incorrect inputs and lock the correct ones, helping you stay focused on the solution. With clean design and intuitive controls, Sudoku Vault is the perfect blend of relaxation and brain training.