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Check any Amazon book niche in one click: estimated sales from BSR, reviews, prices, indie share, a niche score and keyword ideas. Nichely checks any Amazon book niche in one click. Search a keyword on Amazon.com, click "Check niche", and Nichely reads the top 10 organic books for you: estimated monthly sales from Best Sellers Rank, reviews, prices, publication year, how many are self-published, and a clear 0–100 niche score with the reasons. FREE FEATURES • Niche score from 0 to 100, with the three reasons behind it • Estimated monthly sales for each top book, from its BSR (separate curves for Books and Kindle Store) • Median reviews, average price and estimated monthly revenue of the top 10 • Indie share: how many top books look self-published • Keyword ideas from Amazon's own search suggestions, one click to check each one • Export the top 10 to CSV • On any book page: its rank and estimated monthly sales under the title BUILT FOR KDP AUTHORS Use it before you write: compare niches for journals, coloring books, low-content books, nonfiction and fiction. Find long-tail keywords where indie authors win and the reviews are beatable. HONEST ESTIMATES Amazon does not publish sales. Nichely converts the Best Sellers Rank with a rank-to-sales curve and labels every number as an estimate. Ads are skipped. Check a niche on more than one day before you commit. PRIVATE No account, no tracking, no data collection. Everything runs in your browser and only talks to Amazon. Privacy policy: https://tubetools.online/nichely/privacy.html COMING TO NICHELY PRO Niche tracking with alerts, keyword search volume, reverse ASIN and bulk niche checks. Join the waitlist from the extension and get 50% off the first year. Nichely is not affiliated with Amazon. Amazon, Kindle and KDP are trademarks of Amazon.com, Inc. or its affiliates.
Nov 7, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.