Ceedoku is a free, lightweight, and open-source Sudoku game made by Ceebug. It is designed to fit your needs while using as few resources as possible, allowing Ceedoku to run on a wide range of devices. With plenty of features including multiple difficulty levels, dark mode, hints, saving, and more, Ceedoku gives you a simple yet powerful Sudoku experience.

• Fully installable, right from your browser
• Dark mode and light mode (Dark mode is default.)
• Auto Sudoku generation
• Works offline (After opening the installed version at least once with internet.)
• Multiple difficulties (Easy, Medium, Hard, Expert, Master, Extreme, Impossible and Godlike)
• Hints
• Timer
• Pencil mode
• Erase mode
• Game saving
• Theme preference saving (Pick between dark and light mode, then have the game remember which mode you picked and switch to it next time you open the app.)
• No ads
• Pause on lost focus (Your game will be paused if you minimize, close, or otherwise make the app not visible.)
• Best times
• Hint cooldowns
• Haptics
• Sound effects
• Animations
• Settings menu (To control the features.)
• Importing and exporting save files (Using .CSF (Ceedoku Save Format) for the save files.)
• Clickable release version to direct to the changelogs

Ceedoku is a website, not an app. However, this does not mean you cannot install Ceedoku. Below are all the ways you can access Ceedoku.
Whether it be using the website, Installing from an executable, or something else; rest assured: Ceedoku can run on anything.

Use the website

Install from executable

Install from browser

Look at the source code