KDP Keyword Research & Niche Scorer

KDP Keyword Research: Find Profitable Book Niches

Choosing the right niche is the single most important decision for any KDP publisher. A great book in a bad niche will fail, while even a mediocre book in a hungry niche can sell consistently. The key to finding profitable niches is keyword research — understanding what real Amazon buyers are searching for, then analyzing the competition to see if you can realistically rank.

This free tool combines two essential workflows. First, the Keyword Suggest tab pulls real autocomplete data from Amazon, showing you exactly what shoppers type when browsing books. The Deep Search feature automatically expands each suggestion with every letter of the alphabet (the "alphabet soup" technique) to uncover long-tail keywords that most competitors miss.

Second, the Niche Scorer lets you evaluate any niche quantitatively. Instead of guessing whether a market is too competitive or too small, you enter real data from the top 10 search results and get a weighted Opportunity Score. The score factors in demand (BSR), competition (review count), price positioning, and market freshness (how recently the top books were published).

Frequently Asked Questions

Where does the keyword data come from?

The tool queries Amazon's autocomplete API, which returns the same suggestions you see when you start typing in the Amazon search bar. These are real search terms used by actual Amazon shoppers, making them highly relevant for product research.

What is the "alphabet soup" technique?

It's a keyword research method where you append each letter of the alphabet (a through z) to your seed keyword and collect the autocomplete suggestions for each. For example, "coloring book a", "coloring book b", etc. This reveals hundreds of long-tail keywords that a simple search would miss. The Deep Search button automates this entire process.

How do I find BSR and review data for the Niche Scorer?

Search your target keyword on Amazon and look at the top 10 results. Each book listing shows the number of reviews. For BSR (Best Sellers Rank), click into each book's product page and scroll down to the "Product Details" section. The BSR is listed under "Best Sellers Rank." For publication age, check the publication date in the same section.

What is a good Opportunity Score?

A score above 7 is an excellent opportunity with high demand and low competition. Scores between 5 and 7 indicate good potential but more competition. Below 5, the niche may be too competitive or have insufficient demand. The score is a starting point — always validate with your own research.

Can I use this tool for non-English marketplaces?

Yes. The Keyword Suggest tab supports all 12 Amazon marketplaces. Select the marketplace from the dropdown to get autocomplete suggestions in the local language. The Niche Scorer works with any marketplace data — just enter the BSR, reviews, price, and age from the marketplace you're targeting.