If your book is invisible on Amazon, bad keywords are probably the culprit. Here are the five free tools that actually work for KDP keyword research in 2026.
1. Amazon Autocomplete
Type your topic into Amazon Book Search and record every suggestion. This is real customer behavior data, not algorithmic estimates. Try 8-10 starting phrases to generate 40-60 candidate keywords in under 30 minutes.
2. Titans Pro Free Chrome Extension
Shows BSR (Best Seller Rank) data on Amazon search results pages so you instantly know whether you can realistically compete for a keyword. A page full of books above 150,000 BSR signals a winnable niche.
3. Google Trends
Validates whether interest in your topic is rising or declining. Publishing into a growing trend gives you algorithmic momentum.
4. Google Keyword Planner
Free with any Google Ads account (no spending required). Gives approximate monthly search volumes. Cut any candidate below 100 monthly searches.
5. KDP Rank Fuel Free Tools
A free category finder and BSR estimator to validate that your keywords connect to categories where real sales happen.
Once your keywords drive traffic to your book page, reviews close the sale. For more vetted KDP tools, iWrity has a curated KDP services page worth bookmarking.
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