About the Word Search Generator
This word search generator builds a letter grid that hides the words you type — spelling lists, science vocabulary, holiday themes, names for a party game or key terms from a training course. Choose the grid size and difficulty and the puzzle, word list and answer key appear instantly, ready to copy, print or paste into a worksheet.
Easy puzzles place words only across and down, which suits early readers. Medium adds forward diagonals, and hard hides words in all eight directions, including backwards. Longer words are placed first and words are allowed to cross where they share a letter, so even long lists fit into compact grids.
Every puzzle comes from a seed: the same seed and word list always give the same grid, so a teacher can share the seed with a colleague or re-create an answer key later. Change the seed (or clear it) to shuffle a brand-new layout. Spaces, hyphens and punctuation are removed so "ice cream" is hidden as ICECREAM.
How to use the word search generator
- 1Type or paste your words, one per line or separated by commas.
- 2Choose a grid size — about 1.5× the longest word works well.
- 3Pick a difficulty: easy, medium or hard directions.
- 4Copy or print the puzzle and word list, and keep the answer key.
- 5Change the seed for a fresh layout with the same words.
Formula and method
Words are cleaned to the letters A–Z, de-duplicated and placed longest first, because long words are hardest to fit. For each word the generator tries random starting squares and allowed directions; a placement is accepted if every square is empty or already holds the same letter, which lets words cross (a word is never hidden entirely inside another unless no other spot exists). If 150 random attempts fail, it scans every square and direction so a word is only reported as "did not fit" when no legal position exists.
Once all words are placed, the empty squares are filled with random letters. A seeded pseudo-random generator drives every choice, so the same seed and word list always reproduce the same puzzle and answer key.
- n
- Grid size (n × n squares)
- Fill %
- Share of squares occupied by hidden-word letters
Worked examples
Space vocabulary, 12 × 12, medium
All ten words fit in a 144-square grid. Their letters total 62 (PLANET 6, ORBIT 5, COMET 5, GALAXY 6, NEBULA 6, GRAVITY 7, ROCKET 6, ASTEROID 8, TELESCOPE 9, MOON 4), so before any crossings they would cover 62 ÷ 144 ≈ 43% of the squares; shared letters bring the exact figure a little lower.
A word too long for the grid
ENCYCLOPEDIA has 12 letters, so it can never fit in an 8 × 8 grid and is reported as skipped. CAT and DOG are hidden across or down, and because the two words share no letters they use exactly 6 squares, leaving 58 to fill with random letters.
Spelling list with phrases, 15 × 15, hard
Spaces and hyphens are stripped, giving ICECREAM, SANDCASTLE, SUNSCREEN, BEACHBALL, SEASHELL and WAVES. All six fit easily in 225 squares; on hard they may run in any of eight directions, including backwards.
Frequently asked questions
How do I make a word search puzzle?+
Type your word list, pick a grid size and difficulty, and the generator hides every word and fills the rest with random letters. Copy or print the puzzle, the word list and the answer key.
What grid size should I use?+
Make the grid at least as wide as your longest word, ideally 1.5 times wider. Around 10 × 10 suits 8–10 short words for young children; 15 × 15 or larger fits 20 or more words for older students.
Can words go backwards or diagonally?+
Yes. Easy places words only left-to-right and top-to-bottom, medium adds two diagonal directions, and hard allows all eight directions, including backwards, upwards and reversed diagonals.
Why was one of my words skipped?+
A word is skipped only when no legal position exists — usually because it is longer than the grid or the grid is too crowded. Increase the size, shorten the list or switch to a harder level with more directions.
Can I get the same puzzle again later?+
Yes. Puzzles are generated from the seed, so using the same seed, word list, size and difficulty reproduces exactly the same grid and answer key. Clear the seed to get a random puzzle each time.
Do word searches help with spelling?+
Searching for a word forces children to hold its exact letter sequence in mind and check it letter by letter, which reinforces visual spelling patterns. They work best alongside writing the words out, not as a replacement.