Pick a difficulty and get a real sudoku in one click — every puzzle has exactly one solution. No signup, no ads, no paywall. Solve it online, print it clean for the classroom, or share it with a link.
Or open one instantly:
Pick a difficulty and hit Make Sudoku. A fresh puzzle is generated right in your browser and checked to make sure it has exactly one solution. Solve it on screen — click a cell and type a number, or tap a cell and use the on-screen keypad on your phone. Hit Check to see if anything's wrong, or Reveal to show the full solution. When you like a puzzle, print it for a clean worksheet or copy the link to send the exact same puzzle to anyone.
Most sudoku generators bury the print button behind a paid plan, stamp a watermark across the page, cap how many you can make, push ads in front of the grid, or make you sign up first. This one doesn't. There's no account, no email wall, no "upgrade to remove ads," and no limit — make as many puzzles as you want. Every puzzle gets a shareable link that contains the whole grid, so a teacher can build one and send it to the class, or you can text it to a friend. It works on any device — phone, tablet, Chromebook, or laptop — and switches to dark mode automatically. If you've been looking for a free alternative to sudoku.com, Web Sudoku, Discovery Education's Puzzlemaker, or the ad-heavy print-locked sudoku makers, this is it.
This isn't a static picture of a sudoku — it's generated fresh every time. A complete valid grid is built first, then numbers are removed in a symmetric pattern, and after every removal the puzzle is re-checked to confirm it still has a single, unique solution. That means no guessing dead-ends and no puzzles with two answers. Choose Easy for a relaxed solve or Expert for the fewest starting clues. The whole puzzle lives in its link, so the same link always rebuilds the exact same sudoku.
Hit print and you get a clean page — just the title and the grid, with no website header, footer, or ads. Print it blank for solvers, or click Reveal first to print the puzzle with every number filled in for an answer key. Print one for every student, one for the newsletter, or one to hand around the table.
Classroom worksheets and early-finisher activities, substitute-teacher sub plans, newspapers and church or club newsletters, brain games for seniors and memory care, waiting-room and quiet-time activities, and a daily coffee-break puzzle. If you searched for a free sudoku maker, a sudoku generator, a printable sudoku maker, or a no-signup alternative to the paid sudoku tools — this is it. No signup, no ads, no paywall.