Amazon KDP Keyword Research for US Authors
Find the best Amazon.com keywords for your book. Our tool searches real Amazon autocomplete data and search volume databases to surface the keywords US readers actually use when looking for books in your genre.
Amazon.com Keyword Research for US Authors
Amazon.com is the world's largest book marketplace, and keyword optimization is the single most impactful action you can take to improve your book's discoverability. KDP allows 7 keyword fields of up to 50 characters each — that's 350 characters of prime real estate that directly influences whether readers find your book when they search.
The US market has the highest keyword competition of any Amazon marketplace. Generic keywords like "romance novel" or "thriller book" are dominated by established authors with thousands of reviews. The key is finding long-tail keywords — 3-5 word phrases that are specific enough to rank for but still have meaningful search volume. "Enemies to lovers fantasy romance" will convert better than "romance" alone.
Amazon's A9 search algorithm indexes your title, subtitle, and all 7 keyword fields. Keywords in your title carry the most weight, followed by subtitle, then keyword fields. Don't repeat words that already appear in your title — use your keyword slots for additional terms that readers search for but wouldn't fit naturally in a title.
Seasonal keyword trends matter in the US market. "Beach read romance" surges in May-August, "cozy mystery" peaks in October-December, and "self-help books" spikes every January. Updating your keywords seasonally can capture these traffic waves. Our tool shows current search volumes to help you identify what's trending now.
Competitor keyword analysis is one of the most effective strategies. Look at the top 10 books in your target category on Amazon.com — what words appear in their titles and subtitles? These are likely high-performing keywords. Enter those terms into the tool above to discover related keywords and their search volumes.