Word Search Generator

Word search overview

{{ gridSize }} × {{ gridSize }}

{{ placedWordCount }} placed {{ fillPercent }}% filled {{ skippedWordCount }} skipped All words placed {{ directionModeLabel }} Seed {{ seedDisplay }}

Puzzle title:

Used in the puzzle heading and export filenames; keep it short for printouts.

Word list:

One A-Z word per line; spaces, punctuation, digits, and accents are ignored.

{{ parsedWords.invalid.length }} invalid line{{ parsedWords.invalid.length === 1 ? '' : 's' }} ignored. {{ parsedWords.invalid.slice(0, 5).join(', ') }}

Grid size:

Enter 5-25; the longest word must fit within this number of cells.

{{ gridSize }} × {{ gridSize }}

Seed:

Leave blank for a new layout, or reuse a seed to regenerate the same grid.

Direction options:

Diagonals add slanted paths; backwards adds reverse directions to the search.

Preview cell size:

Range 24-48 px; lower values fit large grids better on screen.

Letter cell size {{ cellSize }} px

Colour theme:

Choose print-friendly colour sets used for puzzle cells and answer highlights.

Export quality:

Range 1-3x; higher scale sharpens exports but takes longer.

Capture scale {{ exportScaleDisplay }}

PDF page size:

Choose A4, Letter, Legal, or A3 to match the target paper.

PDF orientation:

Use portrait for handouts; landscape helps wider grids.

PDF margin:

Enter 0-32 mm; use larger margins for printers that clip edges.

{{ foundWordCount === placedWords.length ? 'Word search complete' : 'Find the hidden words' }}

{{ playProgressPercent }}%

{{ foundWordCount }} found {{ placedWords.length - foundWordCount }} remaining {{ directionModeLabel }}

{{ w }} {{ isWordFound(w) ? 'found' : 'hidden' }}

{{ w }}

{{ printableTitle }} answer key

{{ w }} placed

Field	Value	Copy
{{ row.field }}	{{ row.value }}

Word	Status	Start	Direction	Copy
{{ row.word }}	{{ row.status }}	{{ row.start }}	{{ row.direction }}
No word placements yet Generate a puzzle with at least one valid word to populate this ledger.

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Word searches turn a chosen word list into a square field of letters. The target words are hidden along straight paths, and solvers scan across rows, down columns, and sometimes through diagonals until the list is complete. That simple format makes the puzzle easy to explain, but a good grid still depends on careful choices about word length, direction, density, and the age or reading level of the audience.

Teachers often use word searches for spelling review, topic vocabulary, and low-stakes practice. Families and event organizers use them for themes, parties, training sessions, or quiet table activities. In each case, the puzzle is best treated as a recognition exercise. It can reinforce letter patterns and repeated exposure to terms, but it does not prove that a solver understands a word's meaning or can use it in context.

Common word search setup choices and their practical effect
Choice	What it affects	Common mistake
Grid size	How much room long words and overlaps have	Using a small grid for many long terms
Direction set	Search difficulty and placement success	Adding backwards or diagonal paths for beginners too soon
Word cleanup	Which entries can become hidden answers	Leaving spaces, punctuation, numbers, or accents in the list
Answer key	Whether the puzzle can be checked reliably	Printing the filled grid before confirming skipped words

Difficulty is not just a matter of grid size. A short list of familiar five-letter words can feel harder than expected if every word is diagonal or reversed. A dense puzzle with many shared letters may look efficient, yet it can also make shorter words hard to place after the longest paths have taken the best routes. For children or language learners, forward horizontal and vertical paths are usually the gentlest starting point.

Diagram of A to Z words becoming a square letter grid, then a puzzle sheet, answer key, and placement report.

The safest way to judge a generated word search is to check both the puzzle and the answer key. A grid can look complete because every cell contains a letter, while one or more intended words may have been rejected or skipped. The finished activity should match the audience first, then the visual style and export format.

How to Use This Tool:

Start with the words and placement rules. Save visual and export choices until the placed-word count and answer key are correct.

Enter a Puzzle title. It appears on the puzzle sheet and helps name exported files.
Paste the Word list, one entry per line. Use A to Z letters only. Lines with spaces, punctuation, digits, or accented characters are shown as invalid and ignored.
Open Advanced when the default setup is not enough. Set Grid size from 5 to 25, and make sure the longest word is no longer than that number of cells.
Choose direction difficulty. Allow diagonals adds slanted paths. Allow backwards adds reverse paths, including reverse diagonals when diagonals are also on.
Add a Seed if you need to rebuild the same layout later. Leave it blank when a new layout is acceptable.
Click Generate puzzle. Review the overview badges for placed words, fill percentage, skipped words, direction mode, and seed.
Check Answer Key, Build Report, and Word Placements before printing or exporting. If words are skipped, increase the grid size, shorten the list, reduce direction restrictions, or try another seed.

Interpreting Results:

The placed-word count is the first quality check. A completed-looking grid only proves that every empty cell was filled with a letter. It does not prove that every intended word was hidden. Compare Placed words, Skipped words, and Invalid lines ignored in the Build Report.

Word Placements gives the audit trail for each valid entry. A placed row shows the word, start cell, end cell, and direction. A skipped row explains whether the word was longer than the grid or failed to find a legal path. Answer Key highlights the answer mask and is the most useful check before sharing a puzzle sheet.

Fill percentage measures occupied answer cells, not difficulty. Shared overlap cells count once.
Direction mode matters for solvers. Right-and-down puzzles are easier than grids with reverse and diagonal paths.
Seed repeats a layout only when the same word list, grid size, and direction settings are used again.
Play is useful for trying the puzzle yourself. It accepts a straight selected path in either direction when it matches a placed word.

Technical Details:

Word-search construction is a constrained placement problem. Each answer word must fit inside an N x N grid along an allowed vector. A candidate path is valid only when every cell stays inside the square and any already-filled cell contains the same letter. After all placement attempts finish, remaining blanks receive random filler letters so the visible grid has no empty cells.

Long words usually need the scarcest space, so placing them before short words improves the chance that they fit. Direction choices change both solvability and difficulty. More allowed directions create more possible paths, while dense grids increase collisions between letters that do not match. A seed makes the random placement stream repeatable for the same list and settings, but it is meant for puzzle recreation rather than security or fair-draw randomness.

Transformation Core:

Word search generation stages
Stage	Rule	User-visible result
Clean word lines	Trim each non-empty line, uppercase it, and accept only A to Z letters	Invalid lines are reported and left out of placement.
Bound the grid	Round the size and keep it between 5 and 25	The puzzle is always a square from `5 x 5` through `25 x 25`.
Order words	Try longer words before shorter words	Long entries get first access to open rows, columns, and diagonals.
Try paths	Use the active direction set and seeded start cells for up to 500 attempts per word	Words with no legal path are marked as skipped.
Allow matching overlaps	A new word may share a cell only when the existing letter is identical	Overlaps save space without changing the answer letters.
Fill blanks	Remaining cells receive seeded A to Z filler letters	The puzzle sheet is visually complete even when skipped words exist.

Direction Rules:

Direction settings and allowed word paths
Settings	Allowed paths	Summary label
No diagonal, no backward	Left to right, top to bottom	Right + down
Diagonal on, backward off	Left to right, top to bottom, diagonal down-right, diagonal down-left	4 forward directions
Diagonal off, backward on	Left to right, top to bottom, right to left, bottom to top	4 straight directions
Diagonal on, backward on	Horizontal, vertical, and both diagonal families in both directions	8 directions

Validation Boundaries:

Word search validation boundaries
Item	Accepted range or pattern	What happens outside it
Word entry	One or more letters from A to Z	The line is listed as invalid and ignored.
Grid size	Whole number from 5 to 25	The value is rounded and clamped into range.
Word length	No longer than the selected grid size	The word is too long for any straight path.
Placement attempt	Inside the grid, with empty cells or matching overlap letters	The attempt is rejected and another candidate is tried.

Formula Core:

The build report's fill percentage uses occupied answer cells, not total letters across all placed words.

fill percentage = \frac{O}{N^{2}} \times 100

O is the number of grid cells in the answer mask, and N is the selected grid size. If two words share a matching letter cell, that cell contributes once to O.

Play progress is based on placed words found by the solver.

progress = \frac{F}{P} \times 100

F is the number of found placed words, and P is the number of placed words. The display rounds this progress to the nearest whole percent.

Privacy Notes:

Puzzle generation, play selection, answer highlighting, report rows, CSV preparation, and JSON preparation happen in the browser session. Some document, image, and PDF export actions load public third-party browser libraries on demand.

A word list can contain classroom names, private event terms, or internal project vocabulary. Treat exported puzzle files as containing that same information.
The JSON output includes the full grid, answer mask, seed, placed words, skipped words, invalid lines, and report rows.
Changing cell size, theme, export quality, paper size, orientation, or margin changes presentation and files. It does not change the word placement unless the puzzle is regenerated with different placement settings.

Worked Examples:

Classroom vocabulary handout. A teacher enters PYTHON, SUNSET, MALAYSIA, PUZZLE, VECTOR, CODING, ALGORITHM, and SERVER in a 15 by 15 grid with diagonals and backwards paths allowed. After generation, Build Report should show Valid words, Placed words, Fill percentage, Direction mode, and Seed. The teacher checks Answer Key before exporting the puzzle sheet.

Too-long science term. A 10 by 10 puzzle includes PHOTOSYNTHESIS. The word has 14 letters, so Word Placements marks it as too long and Skipped words increases. A grid size of at least 14 gives the term a possible straight path, although the current direction set and seed still decide whether placement succeeds.

Invalid party list cleanup. A themed list includes ICE-CREAM, H2O, and CAFE. The first two lines are invalid because punctuation and digits are not accepted. Rewriting them as ICECREAM and WATER removes the invalid-line warning, while CAFE is accepted because it contains only A to Z letters.

FAQ:

Why was a word skipped?

A word is skipped when it is longer than the grid or when no legal path is found after the placement attempts. Check Word Placements for the status and try a larger grid, a shorter list, a different seed, or more directions.

Why did a line become invalid?

The word list accepts only A to Z letters after trimming and uppercasing. Remove spaces, punctuation, digits, and accented characters before regenerating.

Can I recreate the same puzzle?

Yes. Keep the same word list, grid size, direction settings, and seed. A blank seed creates a new seed for that generation, so save the displayed seed if you want to repeat it later.

Does a higher fill percentage mean a harder puzzle?

Not by itself. Fill percentage measures answer cells divided by grid area. Difficulty also depends on word familiarity, word length, directions, overlaps, and the solver's experience.

Why does the play view accept a word backwards?

The play view checks whether the selected cells match a placed word path in either order. That lets a solver drag from start to end or end to start without changing the answer key.

Glossary:

Answer key: The puzzle view that highlights the cells belonging to placed words.
Answer mask: The hidden map of occupied answer cells used to compute fill percentage and highlight solutions.
Direction mode: The current set of horizontal, vertical, diagonal, and reverse paths allowed for word placement.
Fill percentage: The share of grid cells occupied by placed answer letters.
Placement attempt: A candidate start cell and direction tested for one word.
Seed: A repeatable value used to drive word placement and filler letters for the same puzzle settings.
Skipped word: A valid word that was not placed because it was too long or could not find a legal path.

References:

Word game, Encyclopaedia Britannica, Apr. 20, 2026.
Word search, Cambridge Dictionary.
Basics: Sight Words and Orthographic Mapping, Reading Rockets.
Teaching Reading Is Rocket Science, American Federation of Teachers, 2020.