Codeword Puzzle Generator

What is a codeword puzzle?

A codeword, sometimes called a coded crossword or cipher crossword, is a crossword-style grid in which every letter has been replaced by a number from 1 to 26. The same number always stands for the same letter, so a 7 in one corner of the grid is the same letter as a 7 on the opposite side. There are no clues; instead you are given a handful of starter letters and you crack the rest of the code by spotting which letters must fit to make real, interlocking words. Each puzzle this tool builds places genuine words that cross and share letters, then fills every unused square as a solid dark cell, exactly like the codewords you find in newspapers and puzzle books.

Because there are no written clues, codewords are a wonderfully language-light puzzle: they reward pattern spotting, letter frequency and a bit of vocabulary rather than general knowledge, which makes them friendly for a very wide range of solvers.

How to solve it

Start with the starter letters that are already filled in for you and write them into the matching numbered squares everywhere they appear, using the A–Z code-cracking strip at the foot of the page to record each number as you discover its letter. From there it is detective work: look for short words, common endings such as -ING or -ED, and the letters that crop up most often. A number that appears very frequently is likely to be a common letter like E, A, T or O. Cross-check every guess against the words it would form in both directions. If a choice creates an impossible run of letters, it is wrong. Keep filling the strip until all twenty-six numbers have a letter and the grid spells real words throughout.

What you can customise

• Grid size: from a compact 8×8 up to a roomier 12×12, controlling how many interlocking words appear.
• Starter letters: choose how many letters are revealed at the start, from a tough zero up to a gentle eight, to set the difficulty.
• Answer key: add a fully solved second page that shows every letter and its code.
• Name & date: include header fields when you are printing for a class or club.
• Title and seed: name the sheet and reshuffle for a fresh puzzle whenever you like.

Who codewords are great for

Codewords suit older primary pupils through to adults. In the classroom they reinforce spelling, letter patterns and logical reasoning without needing any prior subject knowledge, so they work well as an early-finisher activity, a cover lesson or a calm settling task. At home they make a quiet screen-free challenge, and they are a popular choice for senior brain-training because the deduction keeps the mind active while the lack of trivia clues keeps them accessible. Print a stack with different seeds and you have a ready supply for a puzzle club, a long journey or a rainy afternoon.

How to use this generator

1. Pick a grid size and the number of starter letters to set the difficulty.
2. Toggle the answer key and the Name & date fields to match how you will use the sheet.
3. Watch the live preview and press Generate New until you get a layout you like.
4. Download or print the branded PDF on A4 or US Letter. Ready to solve straight away.

Every puzzle is generated in your browser and is free to print and share. Combine it with our other word puzzles for a complete activity pack.