# KDP specs as open data

Source: https://kdpbook.io/kdp/data · Updated 2026-10-21

KDP print and eBook specs as free JSON and CSV: trim sizes, page limits, spine factors, margins, printing costs, royalties and languages, from KDP Help.

Checked against KDP Help on 2026-09-26.

- [KDP specs (JSON)](https://kdpbook.io/kdp/data/kdp-specs.json): the KDP rulebook as open data
- [KDP specs (CSV)](https://kdpbook.io/kdp/data/kdp-specs.csv)