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Free tools for KDP authors
Quick, free utilities for self-publishing on Amazon KDP. No account, no upload — everything runs in your browser.
- Cover
KDP Cover Validator
Check if your Amazon KDP book cover meets every requirement — dimensions, aspect ratio, color space, DPI, and file size — before you upload.
Open tool → - Pricing
KDP Royalty Calculator
See what you actually earn per sale: printing cost, your 60% paperback royalty (or Kindle 70/35%), and the minimum price to break even.
Open tool → - Cover
KDP Spine Width Calculator
Get your spine width and full wrap-around cover dimensions from trim size, page count, and paper type — in inches, mm, and pixels.
Open tool → - Marketing
Book Description Grader
Score your Amazon book description against the copywriting best practices that sell books — hook, length, structure, and call to action.
Open tool →