KDP Tools (kdptools.io)
KDP Tools is a web toolkit for KDP publishers with free royalty, KENP and spine calculators plus credit-based AI niche, keyword and category tools.
At a glance
- Price
- Free tier, paid from $9.99/mo (Subscriptions from $9.99/month with 400 credits; credit packs from $2.99. Credits valid for 12 months. Many calculators are free without login.)
- Platforms
- Web
- Outputs KDP-ready files
- Not stated
- Touches your KDP account
- Not stated
- Amazon marketplaces
- us
- Categories
- Keywords & Categories, Book & Niche Research, AI Tools
- Last checked
- 2026-11-09
Summary
kdptools.io bundles dozens of free calculators (royalty, KENP, spine width, print cost, readability) with credit-based tools such as Niche Research, which reads current Amazon.com results for a keyword, a seven-backend-keyword generator, a category matcher and a book tracker for reviews and BSR. Many of its tools are AI-driven, so suggestions need checking and AI-generated content must be disclosed to KDP. The site is ad-supported, and its niche research covers Amazon.com only.
Best for
- Quick KDP calculations and low-cost keyword ideas
Pros
- Free KDP calculators that need no account
- Low entry price for the credit-based research tools
Cons
- Niche research reads Amazon.com only
- AI-generated scores and category matches are not Amazon data
Alternatives
- KDPEasy: KDPEasy is a credit-based web studio for KDP publishers that makes AI covers, puzzle, coloring and planner interiors, and listing drafts.
- Book Bolt: Book Bolt is a subscription app that combines niche research with a KDP-sized cover and interior designer for low-content and puzzle books.
- Publisher Rocket: Publisher Rocket is a downloadable keyword, category and competition research app for Amazon book publishers, sold as a one-time purchase.
Sources
Facts on this page come from the vendor and these pages. Prices change; confirm on the vendor site.
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