Binary Puzzle Maker (Binairo, Takuzu)

Generate, solve, and print Binary Puzzles (0s and 1s / Takuzu) at any size from 6x6 to 14x14, with three difficulty levels and full on-screen solving tools.

Every row and column must end up with an equal number of 0s and 1s, no run of three identical digits is allowed, and no two rows or columns may match — this tool generates, checks, and helps solve exactly that puzzle.

Key features
• Three genuine difficulty levels — Easy, Medium and Hard are defined by the logical technique needed to solve them, not just by how many clues are missing. Hard puzzles specifically require spotting the “matching row/column” trap, so they stay satisfying rather than just fiddly.
• Any grid size from 6×6 up to 14×14, including rectangular grids (e.g. 8×12) — set a different size for each difficulty level, ideal for differentiation across a class.
• Every generated puzzle is computer-verified to have exactly one solution — no dead ends, no guessing required.
• Full on-screen solving tools: click or use the number pad/keyboard to fill cells, live rule-conflict highlighting, a Reveal option (single cell, row, column, or the whole solution), and a Hint button that highlights the next logical cell to fill in — without ever giving away the digit.
• “Enter Your Own” mode — type in any Binary Puzzle from a book or magazine. The tool checks it has a unique solution, then offers the same hints and reveal tools to help you solve it.
• Print-ready PDF export — choose A4 or A5, 1, 2, 4 or 6 puzzles per page, any number of pages, with optional reduced-size answer pages at the back for booklet-style printing.
• Fully offline once opened — runs entirely in the browser with no installation and no accounts.
• GDPR-friendly by design — nothing a pupil types or generates is ever uploaded anywhere; everything stays on the device.
• A flexible extra for logical-reasoning and computational-thinking activities, puzzle clubs, or simply a well-designed maths starter or filler — as useful for take-home practice as for a projected classroom activity.