Fill-In Puzzle Generator
Creates fill-in puzzles (also called kriss-kross or criss-cross): an interlocking crossword-style grid without clues — the word list itself, grouped by length, is all you get, and every word must be fitted where it belongs. Use your own word list or a built-in random word set. The generator tries many dense arrangements and keeps one where the crossing letters pin every word to a single slot. Solve on the page with checking and hints, print a sheet with the length-grouped word bank, or export PNG/SVG.
Runs 100% in your browser — your puzzles never leave your device.
Read the full guide to this tool
Notes
- Rules: write every listed word into the grid, one letter per cell; words interlock like a crossword and each word is used exactly once.
- Unique fit guaranteed: the generator verifies that no two same-length words could be swapped given the crossing letters, so there is exactly one way to complete the grid.
- Difficulty controls how many words the random word set uses; with your own list, more words that share letters make denser grids.
- Runs 100% in your browser — your words and puzzles never leave your device unless you publish an embed.
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