Merch Informer Alternatives for Amazon Merch Sellers
No single tool wins for every Amazon Merch seller. Alternatives sorted by the job you need done: niche research, trademark screeni…
The grid above is your printable sudoku: choose a difficulty, press New puzzle until you get one you like, then press Print. The controls and the rest of this page drop out of the printout, so the paper gets the grid and nothing else. It is free, it is unlimited, and there is no account.
What the button cannot tell you is the rest: which difficulty actually suits whoever is solving, how to get a clean sheet out of a browser, and — if you searched for a generator because you want to publish a puzzle book — what that part really costs.
Which difficulty to pick
The three levels differ in exactly one thing: how many of the 81 cells are already filled in when you start. Those are the clues, or givens.
| Level | Clues given | How it solves |
|---|---|---|
| Easy | about 41 | Scanning rows, columns and boxes is enough. No pencil marks needed. |
| Medium | about 33 | Scanning gets you most of the way; the last cells want candidate notes. |
| Hard | about 27 | Does not fall to scanning. Expect candidate lists in the margins. |
The word "about" is doing real work in that table. The generator fills a complete, valid grid first, then removes numbers one at a time, re-checking after every removal that the puzzle still has exactly one solution. When the next removal would open up a second solution, it stops — which can leave a puzzle a cell or two short of the target. A hard grid that comes out with 28 clues is not a fault. Twenty-eight is simply where that particular grid stopped being uniquely solvable.
That guarantee is the whole difference between a puzzle and an arrangement of numbers. A grid with two valid completions can be finished perfectly correctly in a way that disagrees with the printed answer, which is how a puzzle book earns a one-star review. Here the key is the solved grid the generator began from, not a solution worked backwards out of the clues, so the answers cannot contradict the puzzle.
The gap between 41 clues and 33 is wider than the eight-number difference suggests, because it is the point where scanning alone stops finishing the grid. If you are printing for someone who has never solved a sudoku, stay on easy for several sheets before moving up.
Getting a clean sheet out of it
Print opens your browser's own print dialog. Everything that is not the puzzle is hidden from the printed version — the difficulty buttons, this article, the site around it — so you do not have to fight the layout to get a bare grid.
Print the puzzle first, with the answers hidden. Then press Answers and print again for the key. The toggle swaps the solved grid into the same place, so whatever is on screen is what comes out; in that order you end up with a puzzle sheet and a separate answer sheet rather than a spoiled puzzle.
Two settings worth checking if your print dialog offers them: turn background graphics off, and leave the scale at 100% so the grid prints at the size it was drawn for.
One grid per sheet is deliberate here, so the puzzle stays readable inside an article. When you want several at once, the ready-made sheets do it better — four easy grids to a page with the key, or one oversized grid per page with numbers and blanks big enough to write in comfortably. Between them the printables section holds six sudoku layouts and 66 themed word searches, all free and all with answer keys.
What a sudoku book actually takes
A lot of people reach a generator because they have read that puzzle books sell on Amazon. Generating puzzles is the easy part, and the free part. The cost is everything after it.
Start with the printing bill, because it decides whether a book is worth publishing at all. Amazon KDP charges a fixed cost plus a per-page cost, with a flat band from 24 to 110 pages (108 on Amazon.com.au). For US black ink on large trim — anything over 6.12 inches wide or over 9 inches high, which includes 8.5 x 11 — the flat band is $2.84, and above it printing costs $1.00 plus $0.017 a page. Royalty is 50% at a list price of $9.98 or below on Amazon.com and 60% from $9.99 up, with Expanded Distribution a flat 40%.
Put those together on an 8.5 x 11 black-ink paperback listed at $9.99:
| Interior pages | Printing cost | Royalty per copy |
|---|---|---|
| 110 | $2.84 | $3.15 |
| 120 | $3.04 | $2.95 |
| 150 | $3.55 | $2.44 |
| 200 | $4.40 | $1.59 |
Ten pages are worth twenty cents a copy at the top of that table, because 110 is the last page of the flat band and 120 is not. A hundred puzzles with a hundred answer pages is 200 pages, and it earns roughly half what a 110-page book earns at the same price. The list price itself is just as sharp: that same 110-page book at $9.98 pays $2.15, because it falls into the 50% band, against $3.15 at $9.99. One cent of list price is a dollar a copy. The KDP royalty calculator runs your own trim size and page count through the same formula.
Then there is assembly. KDP Creator builds puzzle books at volume and exports a ZIP of numbered 300-DPI PNG pages plus a MANIFEST.txt. It does not produce a PDF — you assemble the interior yourself from those images in whatever layout tool you already use. That is worth knowing before you pay rather than after. It is $9.99 a month, $99.99 a year, or $79.99 once for a lifetime licence, with a 3-day trial that requires a card and is limited to a first subscription; once billing starts, all sales are final. The annual plan costs more than the lifetime licence, so between those two, lifetime wins outright.
The usual paid alternative is Book Bolt: Pro at $23.99 a month or $19.99 a month billed annually, Premium at $35.99 or $29.99. Both tiers include the puzzle, crossword and sudoku tools, the Studio designer and KDP Spy; Premium differs in AI credits (4,000 against 1,000), graphics packs, beta access and support. It runs a 3-day trial too. Weigh either one against how many books you genuinely intend to publish this year, not how many you intend to plan.
Questions
Is every puzzle different?
Yes. Each press of New puzzle seeds a fresh generation rather than drawing from a fixed stock, so printing the same difficulty ten times gives you ten different sheets.
Why did my hard puzzle come out with 28 clues instead of 27?
Because clues come out one at a time, and only while the grid still has exactly one solution. When the next removal would allow a second solution, the generator stops there — so the final count lands near the target rather than exactly on it. The puzzle is still valid; it is just one clue kinder than the label promises.
Can I use these puzzles in a book I sell?
Yes. Every puzzle generated here is yours to use, including in a book you sell. Assembling a hundred of them by hand out of a browser is slow work, which is what KDP Creator exists for, but nothing stops you doing it manually.
Do I need an account to print one?
No. Nothing on this page, or anywhere else in the printables section, sits behind a login — the puzzles and their answer keys are free to print without ever creating an account. Signing up only becomes necessary once you move to one of the paid tools — everything free on the site never asks for it.
