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The Ultimate Free Sudoku Toolkit: Websites, Apps & Printables (2024 Edition)

Endless free Sudoku awaits. Here's your curated tier list.

🌐 Websites (Browser — No Install)

SiteBest ForFeaturesAds
Sudoku.com (Web/App)Daily habit, clean UI4 difficulties, pencil marks, undo, timer, stats, hints, printLow (banner)
Web Sudoku (websudoku.com)Custom generation4 difficulties, custom puzzle input, print, "Evil" mode, no loginLow
Sudoku.com.au (Australian)Printable PDFsDaily PDF packs (Easy→Extreme), archive, no JS requiredNone
Krazydad (krazydad.com/sudoku)Volume & VariantsThousands of PDF books (12/pg), variants: Killer, Jigsaw, Samurai, 16x16None
  • BrainBashers: Daily Sudoku + other logic puzzles (Kakuro, Slitherlink).
  • NYTimes / Washington Post / Guardian: Daily curated (paywall may apply).

📱 Mobile Apps (iOS / Android)

AppPlatformStandout FeatureMonetization
Sudoku.com (Easybrain)iOS/AndroidBest all-rounder: daily, events, themes, stats, no forced ads mid-puzzleFree + optional sub (remove ads, hints)
Andoku 3AndroidMost variants (Killer, X, Hyper, %, Color), offline, open-source-ishFree (dev donation)
Good Sudoku (Zach Gage)iOSTeaches techniques (X-Wing, Swordfish) interactively. Beautiful.Free trial → $5 unlock
Sudoku by BrainiumiOS/AndroidClean, hint explains why, daily challengeAd-supported
Enjoy Sudoku (Jason Linhart)iOSDeep hint engine, infinite puzzles, Apple WatchPaid ($3-5)

🖨️ Print & Go

  • Krazydad PDF Books: Print 12/page, staple → portable booklet.
  • Sudoku.com.au Daily PDF: Single page, 4 puzzles + solutions.
  • PrintableSudoku.com: Customizable grid size, difficulty, # per page.

🧠 Want to Get Good?

  • Learn candidate elimination (pencil marks) → hidden singles/naked pairs → X-Wing, Swordfish, XY-Wing.
  • Good Sudoku (app) teaches this interactively. Hodoku (PC, free) = best trainer + solver + generator.
  • Cracking the Cryptic (YouTube): World-class solving videos. "How to solve a Sudoku" playlist.

Start now: Open sudoku.com or install Andoku 3 / Good Sudoku. One puzzle a day = sharper logic.

Jigsaw Puzzles
Jigsaw Puzzles

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