Word Search Generator — Printable PDF

What you can customise

Every word search is built around the options you choose:

• Word list — paste or type one word per line; the generator strips punctuation and removes duplicates automatically.
• Grid size — from 10×10 up to 25×25 cells, depending on how many words you want to hide and how much challenge you want.
• Diagonal placement — toggle whether words may run diagonally (down-right, down-left, up-right, up-left) in addition to horizontal and vertical.
• Backwards words — allow words to read right-to-left, bottom-to-top, or along backwards diagonals.
• Overlapping letters — let words share cells where letters match, packing more words into a smaller grid.
• Puzzle title — appears at the top of the printed page; leave blank if you prefer no heading.
• Solution page — optional second page with each placed word highlighted in colour so you can verify placement or provide an answer key.

How to use the tool

1. Type or paste your word list into the text box, one word per line.
2. Choose a grid size that comfortably fits your words — 15×15 is a safe starting point for ten to fifteen medium-length words.
3. Tick the boxes for diagonals, backwards, and overlaps according to the difficulty you want.
4. Enter a title if you want one printed at the top of the page.
5. Click Generate PDF and wait a moment while the algorithm places your words.
6. Review the preview; if some words did not fit, try a larger grid or fewer direction constraints.
7. Download and print on A4 or US Letter paper.

Who word search puzzles are for

Teachers

Reinforce spelling lists, vocabulary themes, or subject terminology. Print a class set in seconds and include the solution page for quick marking.

Parents and homeschoolers

Turn any list — sight words, country names, family members — into a screen-free activity. Adjust difficulty by toggling diagonals and backwards placement.

Puzzle hobbyists

Create themed puzzles for parties, newsletters, or personal challenge. The colour-coded solution page makes it easy to check your own work or confirm every word was placed.

Worked classroom example

A Year 5 teacher preparing a geography unit on European capitals enters fifteen city names: PARIS, BERLIN, MADRID, ROME, VIENNA, ATHENS, LISBON, OSLO, WARSAW, PRAGUE, DUBLIN, BRUSSELS, STOCKHOLM, BUDAPEST, AMSTERDAM. She selects an 18×18 grid, enables diagonals but disables backwards to keep difficulty moderate, allows overlaps to fit all fifteen words, and titles the puzzle "European Capitals". The generator places fourteen words successfully; AMSTERDAM is too long and does not fit. She switches to 20×20, regenerates, and all fifteen words appear. She downloads the two-page PDF — puzzle on page one, colour-coded solution on page two — and prints thirty copies for the class.

How it works under the hood

The generator normalises your word list by converting to uppercase and removing non-letter characters, then attempts to place each word in the grid according to your direction rules. It tries random starting positions and directions up to a configurable number of attempts per word. If overlaps are allowed, it checks that crossing letters match. Empty cells are filled with random letters. Words that cannot be placed within the attempt limit are reported separately so you know to adjust your settings.

Designed for A4 and US Letter printing

The PDF layout fits both A4 (210×297 mm) and US Letter (8.5×11 inch) paper with comfortable margins. Grid cells scale automatically so that a 10×10 puzzle uses larger type than a 25×25 grid, keeping every puzzle readable without requiring landscape orientation or poster-size sheets.

Notes and limitations

• Maximum grid size is 25×25; larger grids produce cells too small to read comfortably on standard paper.
• Very long words (more than the grid dimension) will not fit and appear in the unplaced list.
• The algorithm uses a finite number of placement attempts per word; if you disable all direction options or choose a very small grid, some words may remain unplaced.
• Random fill letters are drawn uniformly from A–Z and do not favour common English letter frequencies.
• Accented characters and non-Latin scripts are stripped during normalisation.