Free KDP tools for puzzle publishers
No account, no watermark. Files are checked in your browser and never uploaded.
PDF preflight checker
Check any interior or cover PDF against KDP rules.
Spine & margin calculator
Spine, gutter and full-cover size for any trim and paper.
Word list cleaner
Dedupe, alphabetise and flag typos, long words and rude words.
Cover template
A blank cover template with spine, bleed, safe and barcode zones.
Large-print checker
Is your book really large print?
Sudoku checker
Paste a sudoku — we tell you if it has exactly one solution.
Weekly slot countdown
When KDP’s weekly new-title limit resets, in your time.
AI disclosure helper
How to answer KDP’s AI-content question for a puzzle book.
Word search generator
One free puzzle with its answer key. No watermark.
Sudoku generator
One graded sudoku with exactly one solution, and its answer.
Maze generator
One maze with a single path, and its solution.
Word scramble generator
Jumbled words with an answer key; no scramble spells another word.
Cryptogram generator
A coded quote with starter letters, and the decoded answer.
Number search generator
Digits hidden in a grid, each exactly once.
Math worksheet generator
Fresh problems by school grade, with answers.
Tracing worksheet generator
Letters, numbers, words or a name to trace.
Fill-in generator
A word fill-in grid with one solution.