Web Sudoku review

Web Sudoku is the plainest way to play free sudoku online. Gideon Greenspan and Rachel Lee launched it in June 2005, and the site says it is played by millions of visitors monthly. You open websudoku.com, pick Easy, Medium, Hard or Evil, and play in any browser, including on tablets and phones, with no account. A Pencil Marking option shows up to 5 candidate numbers in a cell, and the How am I doing? button flags mistakes instead of giving away the answer. A Daily Sudoku Variation adds a different puzzle type each day. Web Sudoku Deluxe, a one-time $14.95 download for Windows with a Mac version, adds offline play, an Extreme level, Sudoku-X, Squiggly and grids from 4x4 to 16x16, plus printing and solutions. The free site shows ads and has a dated look next to the apps on this list. We compared documented features and published prices only.

Who it is for

Players who want a simple free sudoku in any web browser with no app or account.

Price

Free online with ads; Web Sudoku Deluxe for Windows is $14.95 one-time.

Web Sudoku Deluxe for Windows costs $14.95.
Quoted from the vendor pricing page on November 10, 2026.

Key features

• Unlimited online puzzles in Easy, Medium, Hard and Evil
• Pencil marking option
• How am I doing? check for mistakes
• Daily Sudoku Variation
• Deluxe download adds Sudoku-X, Squiggly and grids from 4x4 to 16x16

Strengths and weaknesses

• Strength: Works in any browser, on tablets and phones
• Strength: No sign-up needed to play
• Strength: Deluxe is a one-time purchase, not a subscription
• Weakness: Ads on the free site
• Weakness: Basic interface compared with modern apps
• Weakness: No solutions on the free site

Key facts

• Launched: June 2005
• Levels: Easy, Medium, Hard, Evil
• Paid option: Web Sudoku Deluxe for Windows, $14.95 one-time
• Founders: Gideon Greenspan and Rachel Lee

Where it ranks

Web Sudoku is No. 6 in our Best Free Sudoku Games verdict.