Crossword Puzzle Maker
Turn your own words and clues into a printable crossword with an answer key. Free, fast, and your files never leave your device.
Add a word and its clue on each row (up to 20). The maker places the longest word first, then fits the rest so they cross.
Free for personal and classroom use. Printed and downloaded puzzles from the free tier carry a light "ZillaKit.com" watermark across the grid. Premium removes the watermark, unlocks custom background uploads, and includes a commercial licence for selling or publishing your puzzles (books, worksheets, products).
How the grid gets built
You supply the content: a word and its clue on each row, up to twenty rows, added one at a time with the "Add word" button. The maker then does the fitting. It sorts your entries longest first, places the longest word, and for every word after that it tests each possible intersection with what is already on the grid, keeping placements that create a genuine crossing. The result is one connected puzzle rather than a page of floating words. Entries that share no letter with anything already placed cannot cross, so they are reported in the warning line instead of being forced into an invalid layout.
That behaviour has a practical consequence: your word list, not the software, decides how good the grid looks. Lists with a spread of common letters interlock tightly. Lists where most words are short and start with the same letter tend to produce a sparse grid with a few unplaced entries.
Settings that change the printed page
The style panel holds two groups. Backgrounds offer thirteen themes, among them lined paper, chalkboard, stars and space, ocean waves and a pastel gradient, with an opacity slider from 5 to 40 per cent. Typography sets the font from six print safe stacks, the title size, the clue list size, the grid line thickness and colour, and a cell size slider from 28 to 48 pixels. There is also a switch for whether cell numbers appear on the answer key, which is worth leaving on if a relief teacher may be marking.
Writing clues that teach something
A crossword is only as useful as its clues, and this is where the tool hands the work back to you. For vocabulary revision, a definition clue checks recall. For comprehension, a clue that quotes a sentence from the text with the answer removed checks whether students read it. For a language class, the clue can be in the target language with the answer in English, or the reverse.
Two habits make clues fairer. Keep the clue to one grammatical form so the answer is unambiguous, and avoid clues that only work if the student has the answer already. Our guide on crossword clue writing for teachers goes through cryptic, definition and fill the gap styles with examples you can copy.
A worked example: Year 7 cells revision
Before a Year 7 biology test, enter twelve terms with clues: nucleus, membrane, cytoplasm, mitochondria, chloroplast, vacuole, organelle, diffusion, osmosis, tissue, microscope and enzyme. Clue nucleus as "Control centre of the cell", osmosis as "Movement of water across a membrane", and so on. Set the cell size to about 40 pixels so the grid fills a page without crowding, leave the clue list at medium, and give it the title "Cells Revision".
Generate, then read the warning line. If two short terms failed to cross, either swap them for longer ones from the same topic or accept an eleven word puzzle, which is usually enough for a twenty minute revision task. Print, and you get the empty numbered grid with Across and Down clues on the first page and the filled key on a second page. Students who finish early can be asked to write one extra clue for a term that did not make it in, which is harder than solving the puzzle and shows who actually understands the definition.
Choosing a size by year level
Year 3 and Year 4 do well with six to ten short words, a large cell size and a large clue list, because the physical act of writing one letter per square is still developing. Year 5 and Year 6 handle ten to fourteen words comfortably. Year 7 and above, or an adult puzzle for a staff morning tea, can take the full twenty entries with the cell size dropped towards the lower end of the slider so everything still fits on one page.
Differentiation ideas
The same twenty entries can produce several sheets. Build the full puzzle for the class, then remove the six hardest entries and regenerate for students who need a shorter task. For students who need more support again, print the puzzle and write three answers into the grid before photocopying, which gives crossing letters to work from. For extension, hand over the empty grid with the clue list replaced by a plain word bank so students must decide which word fits which numbered slot. Students who work faster than everyone else can build their own puzzle for the class using the same tool, which is a legitimate task rather than a reward.
Printing on A4
Send the puzzle to the printer from a desktop browser, pick A4 portrait, and leave the margin setting alone. The puzzle page and the answer key page are separate by design, so printing page one on its own gives you a clean student copy. If you chose a background theme, enable "background graphics" in the print dialogue, otherwise the theme is dropped and everything else prints normally. Large grids with long clue lists occasionally push the clues onto a third page; reducing the cell size by a few pixels or the clue list size by one step usually pulls it back. See how to get a worksheet onto one A4 page for scaling, margin and duplex settings.
Licence, watermarks and resale
Classroom, homeschool and personal use costs nothing, class sets included. Without a paid plan, anything you print or download shows a faint tiled ZillaKit.com marking over the grid and a credit line beneath it. It is faint enough to solve over, but it is there, and it appears on the PNG exports as well as the printout.
Premium clears that marking, enables custom background uploads, and grants a commercial licence permitting sale or publication, whether that is a puzzle book, a paid worksheet bundle or a product. Puzzles made without it may not be sold. If publishing is the direction, publishing a puzzle book on KDP covers trim size, bleed and interior file requirements.
Related tools
The Word Search Maker takes the same vocabulary list without needing clues, the Flashcard Maker turns word and clue pairs into study cards, and the Bingo Card Maker covers the same terms as a whole class game.
Common questions
Why will some of my words not fit?
A word is only placed if it can cross something already on the grid. If an entry shares no letter with any placed word, or every shared letter position is already occupied, it is left out and named in the warning line. Adding a longer word with common letters often rescues the rest.
How many words should a classroom crossword have?
Ten to fourteen suits most upper primary and lower secondary classes. Six to ten works better for Year 3 and Year 4, and the twenty entry maximum is best kept for older students or adult puzzles.
Does the answer key print separately?
Yes. Printing produces the numbered empty grid with Across and Down clues first, then the completed key on its own page, so you can print page one alone for students.
Is there a watermark on free puzzles?
Yes. Anything printed or downloaded without a paid plan shows a faint tiled ZillaKit.com marking and a credit line, both of which Premium clears.
Can I sell crosswords made here?
Only with the commercial licence that comes with Premium. Otherwise puzzles are for you, your family or your class, and may not be published or sold.
Are my words and clues uploaded?
No. Grid building, printing and the PNG exports all run in your browser, so nothing you type is sent to a server.