Free tools for authors
Free Self-Publishing Tools for Print Books
Get your print book right the first time, with no sign-up.
KDP Cover Size Calculator & Template Generator
Exact full-wrap cover size, spine width and a downloadable 300 DPI cover template for any KDP paperback.
Book Spine Width Calculator
Spine width in inches and millimeters for Amazon KDP and IngramSpark, by page count and paper.
Book Cover Dimensions
Print cover sizes for every common trim size, with bleed, spine and pixel sizes.
IngramSpark Cover Template Guide
How to get and use IngramSpark's template, and the template mistakes that get covers rejected.
IngramSpark Rejection Messages Explained
What every common "Title Processing Error" really means, and how to fix it.
Want it all checked for you?
SparkPrep checks your actual cover and interior against KDP, IngramSpark, Barnes & Noble and Lulu rules, explains every problem in plain English and fixes it, before you upload.
Try SparkPrep