Sudoku247Online
Free online sudoku with Killer mode and Evil difficulty
What it does
Most free sudoku sites feel stuck in 2010 or buried in ads. Sudoku247Online is a clean, fast, no-signup web app with the classics plus Killer Sudoku, two new harder tiers (Master at 18-19 givens, Evil at the proven 17-given floor), and unlimited printable puzzles in multiple layouts. Features include a graduated hint system (Reveal Cell, Reveal Box, or free Show Candidates), full pencil-mark support with one-tap auto-fill, and a built-in sudoku strategy blog. Works on any device.
Does the same job
all alternatives →- SWSudoku with 0 Bells or Whistles2023 · ▲48
Hello HN, I've created a new Sudoku app for iOS and Android that prioritizes simplicity and privacy. It's free to download and use, and I'd be grateful for any feedback or suggestions. Features: > 4 difficulty levels, accessible at any time > No personal data collection of any kind > Clean, minimalistic design that focuses on the game > Takes up significantly less space than other popular apps (by a factor of about 10x) > Minimal use of advertisements I was frustrated by how many of the popular Sudoku apps feel excessively over-engineered, consume a lot of storage space and some that even…
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Hi HN, I've been working on this Sudoku web app for the past couple of years, on and off during free weekends and afternoons. I started working on it because I was bored during COVID, and Cracking the Cryptic had just become popular on YouTube, which got me wondering how hard it could be to make a Sudoku app. The main idea is for the app to understand the constraints and know how to solve Sudoku grids (and not just be a simple Sudoku drawing/playing app). When it comes to classic Sudoku, the solver doesn't support anything more complicated than X-Wing, but it understands the…
Sudoku InfinityJul 2026 · play.google.com · ▲4Sudoku with no forced ads, 17-clue puzzles, and offline play
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Source: https://github.com/alabhyajindal/sudoku/blob/main/index.html
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