Free
Maze Studio
Print-ready mazes at any grid size and difficulty.
Free · no account needed
4 free tools for anyone publishing print books.
Spine width, royalty maths, trim sizes, ISBN barcodes. Everything runs in your browser — nothing uploads, nothing costs money, no account needed to try.
The toolbox
4 live
Covers
Spine width calculator
Exact spine width and full cover size for any page count.
Money
Royalty calculator
Printing cost, royalty and margin for a KDP paperback.
Interiors
Trim size and margin guide
Bleed, margins and gutter for every KDP trim size.
Covers
ISBN barcode generator
Scannable EAN-13 barcode for your back cover.
More on the way. Every one of these runs entirely in your browser -- nothing is uploaded, nothing is stored, and none of it needs an account.
Ready to export your interior?
Downloads need an account, and accounts come with any purchase. Your login details arrive by email the moment you buy.
And 11 full apps, included with every account
Free
Free
Word Search Forge
Themed word searches with verified solutions.
Free
Sudoku Press
Classic sudoku, every puzzle proven to have one solution.
Free
Crossword Compositor
Fill-in crosswords built from any word list.
Free
Kakuro Bench
Cross-sum puzzles with verified unique solutions.
Free
Nonogram Works
Picture logic puzzles solvable by pure deduction.
Free
Cryptogram Desk
Letter ciphers from public-domain proverbs.
Free
Coloring Page Mill
Line-art coloring pages with print-safe stroke weights.
Free
Planner Plate
Undated planner interiors that print straight and true.
Free
Mandala Drafter
Symmetrical mandalas with adjustable complexity.
Free
Dot-to-Dot Draft
Numbered dot-to-dot pages that always join up cleanly.