Free KDP Keyword Research Tool

A KDP keyword tool shows you the real searches readers type into Amazon to find books, so you can spot a niche worth writing in. Enter a topic or genre and it returns hundreds of the phrases book buyers actually search, pulled from Amazon's Books department autocomplete. Recurring searches point to live reader demand you can read before you write a word. Later, the same phrases guide your title, subtitle, and backend keywords.

Start with a broad phrase that describes the kind of book you might write, for example "cozy mystery" or "sourdough cookbook". Enter it above and the tool expands it into the longer, more specific searches readers make on Amazon. Look for precise sub-topics and formats that keep recurring, since steady demand is a sign of a niche worth writing for. Research the strongest ones again to uncover the angles and subgenres readers are asking for.

Keyword research reveals what readers are actively searching on Amazon before you write a page. Enter a broad theme and watch which specific sub-topics and formats recur; steady demand with thin or dated results is a niche worth targeting. Favor precise, low-competition phrases over crowded head terms, since they show clearer reader intent. Validating a niche this way is how you avoid spending months on a book no one is searching for.

KDP gives you seven backend keyword fields, and your title and subtitle carry the most weight, so put your strongest phrases there and do not repeat a word across fields. That placement only pays off if the keyword points to real demand, which is why the research comes first. Use the tool to confirm readers are actually searching a phrase before you build a book around it.

Broad genres like "romance" are crowded with established authors, so target the longer phrases this tool surfaces, like "small town enemies to lovers romance". Those specific searches face fewer competing titles and reach readers who know exactly what they want. Favor topics with steady demand but few strong or recent books, since that gap is your opening. Confirming it here before you write is how you pick a niche you can actually rank in.