KDP King is a free royalty dashboard and data analytics tool built for Amazon Kindle Direct Publishing (KDP) authors. It helps self-published authors turn the dull spreadsheets exported from Amazonβs backend into clear visual charts, making it easier to understand sales and earnings performance.
The tool is centered on royalty data: it can generate earnings charts, provide book-level breakdowns, filter by different marketplaces, aggregate income across multiple currencies, and estimate Kindle Unlimited (KENP) royalty earnings. In terms of data source and scale, KDP King does not rely on automatic syncing. Instead, users manually upload .xlsx royalty files exported from the Amazon KDP dashboard, so the amount of data it processes depends entirely on the authorβs own sales volume. Notably, the tool places a strong emphasis on privacy: all file processing is done locally, and data never leaves the userβs browser.
KDP King is completely free, with no premium unlocks or hidden fees. As a web-based tool, it requires no installation. Support is limited to running in the browser, with no complex system integrations or API connections; data import must be done manually.
Its biggest advantages are zero cost and strong privacy protection through local processing. The multi-currency aggregation and KENP estimation features also directly address common pain points for authors selling internationally. The drawbacks are that its feature set is fairly narrow and limited to royalty analysis; it lacks automation, requiring users to export and upload xlsx files manually each time; and it only supports Amazon KDP, with no coverage for other publishing platforms.
This tool is a great fit for individual self-published authors who have a limited budget, care strongly about data privacy, and primarily sell across multiple marketplaces and currencies on Amazon.
Because KDP King is a pure front-end processing tool and does not involve complex cloud syncing, it is generally accessible directly from China. Its free nature also means there is no payment barrier to consider. If you need stronger automation or multi-platform coverage, alternatives such as Publisher Rocket or BookBeam may be worth considering, though they are typically paid products.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on kdpking.com official site.
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