Are the tools free?
Yes. Free Toolyz tools are free to use without creating an account.
Free Online Tools for Authors & Publishers
Practical browser-based utilities for authors and publishers. Start with Amazon KDP royalty and BSR sales calculators, with more publishing tools added over time.
Start with These Tools
- KDP Royalty Calculator
Use this free KDP royalty calculator to estimate Amazon KDP royalties for Kindle eBooks, paperbacks, and hardcovers with royalty rates, printing cost, delivery cost, VAT, and projected book sales.
- KDP Sales Estimator (BSR)
Use this free KDP BSR sales calculator to estimate Amazon KDP earnings per month from Best Sellers Rank (BSR). Enter BSR, marketplace, and format to compare daily, weekly, and monthly copies sold.
- Free AI Coloring Page Generator
Use this free AI coloring page generator to create printable black-and-white outline coloring sheets from a short idea. Pick a kid-friendly art style and line weight, then download a high-contrast PNG coloring page for crafts, classrooms, or relaxation.
- Free AI Coloring Page from Photo
Use this free AI tool to turn a photo into a printable black-and-white outline coloring page. Upload a picture or paste an image link, choose art style and line weight, then download a square PNG coloring sheet.
All Tools
- KDP Royalty Calculator
Use this free KDP royalty calculator to estimate Amazon KDP royalties for Kindle eBooks, paperbacks, and hardcovers with royalty rates, printing cost, delivery cost, VAT, and projected book sales.
- KDP Sales Estimator (BSR)
Use this free KDP BSR sales calculator to estimate Amazon KDP earnings per month from Best Sellers Rank (BSR). Enter BSR, marketplace, and format to compare daily, weekly, and monthly copies sold.
- Free AI Coloring Page Generator
Use this free AI coloring page generator to create printable black-and-white outline coloring sheets from a short idea. Pick a kid-friendly art style and line weight, then download a high-contrast PNG coloring page for crafts, classrooms, or relaxation.
- Free AI Coloring Page from Photo
Use this free AI tool to turn a photo into a printable black-and-white outline coloring page. Upload a picture or paste an image link, choose art style and line weight, then download a square PNG coloring sheet.
Frequently Asked Questions
Is this official Amazon advice?
No. Free Toolyz provides planning estimates only. Confirm final fees and rules in your KDP account before publishing.