9+ Best KDP Keyword Generator Tools (Free & Paid)

KDP (Kindle Direct Publishing) is a popular self-publishing platform used by many authors to publish and sell their books on Amazon.

One of the most important aspects of publishing on KDP is keyword research. Keywords are the words or phrases that readers use to search for books on Amazon. Using the right keywords can help authors reach their target audience and increase their book’s visibility on Amazon.

To help authors with their keyword research, there are many KDP keyword generators available on the market. These tools can help authors find the most relevant and high-performing keywords for their books. Some of these tools are free, while others require a subscription or a one-time fee.

In this article, we will review some of the best KDP keyword generators available in 2023. We will discuss their features, pricing, and how they can help authors with their keyword research.

By the end of this article, authors will have a better understanding of the different KDP keyword generators available and which one is best suited for their needs.

So, let’s dive in!

The Importance of Keywords in KDP

Keywords play a crucial role in making a book discoverable on Amazon’s Kindle Direct Publishing (KDP) platform. By using relevant and high-performing keywords, authors can increase the visibility of their books and improve their chances of ranking higher in Amazon’s search results.

When readers search for books on Amazon, they use keywords to find titles that match their interests. If an author has not used relevant keywords in their book’s metadata, it is less likely to appear in search results, which can negatively impact its discoverability.

Using the right keywords can also help authors target specific audiences and improve their book’s ranking in Amazon’s search results. By using keywords that are relevant to their book’s content and genre, authors can increase the chances of their book being found by readers who are interested in similar titles.

In addition to including relevant keywords in the book’s metadata, authors should also consider using them in the book title and description. By doing so, they can improve the book’s discoverability and make it more appealing to potential readers.

Best Amazon KDP Keyword Generators:

Here are some of the top Amazon KDP keyword generator tools that can help boost your book’s discoverability and sales:

1. Publisher Rocket

publisher rocket

Previously known as KDP Rocket, Publisher Rocket is a preferred advanced choice for authors and publishers aiming for success on Kindle.

This tool offers invaluable insights into Amazon’s consumer buying patterns, helping users identify optimal keywords for their book listings. Additionally, it assists authors in generating effective keywords for AMS ads, which is crucial for boosting book sales.

publisher rocket keyword research

A standout feature of Publisher Rocket is its ability to identify keyword phrases that are both relevant to your book and underutilized by competitors.

Many in the industry consider Publisher Rocket to be the top tool for Amazon authors, and perhaps you should too,

Pricing: One-time fee of $97 (30-Day Money Back Guarantee Available)

Check out Publisher Rocket: Click Here

Read our full Publisher Rocket Review

2. Book Bolt

book bolt

Book Bolt, often celebrated for its design-centric features, is also a powerhouse when it comes to KDP keyword generation.

Its algorithm delves deep into the Amazon marketplace, analyzing top-performing books and emerging trends. The result is a curated list of keywords that not only align with an author’s content but also tap into the current readership’s pulse.

By focusing on both broad and niche-specific terms, Book Bolt ensures that authors achieve a balance of visibility and relevance. Its intuitive interface and real-time updates make the keyword selection process streamlined and effective.

Apart from keyword research capabilities, Book Bolt also offers fantastic design features, especially for low-content books. The design features include an interior generator and a book cover maker.

Pricing: Newbie $9.99/mo, Pro $19.99/mo (3 Day Trial Available)

Check out Book Bolt: Click Here

Read our Book Bolt Review

3. Self Publishing Titans

self publishing titans

A treasure trove for indie authors, Self-Publishing Titans offers an array of free tools aimed at ensuring KDP success.

Among their offerings are effective keyword research tools, planners, puzzle tools, and niche discovery resources. Two notable free tools focus on unearthing low-competition niches and keywords.

For those using Chrome, the Self-Publishing Titans Search Suggestion Expander extension offers an added layer of efficiency for keyword research.

suggestion expander Amazon

Moreover, their masterclass provides tailored guidance for aspiring self-publishers, equipping them with resources to thrive on Amazon KDP.

Pricing: $97 one-time fee (Free version available)

Check out Self Publishing Titans: Click Here


kdp spy

KDSPY is a helpful browser extension for authors who want to keep track of their competitors’ book sales rankings.

It’s one of the best and most advanced Amazon KDP Chrome extensions out there, making it easier for authors to find profitable niches and keywords.

With KDSPY, authors can make informed decisions about their own book’s keywords and niche selection. This tool allows users to research long-tail keywords, analyze the competition, and find profitable categories, which can improve their book’s visibility and chances of ranking on Amazon.

In comparison to another similar tool called Publisher Rocket, KDSPY offers fewer insights for Kindle market research but comes with more affordable pricing.

Pricing: $69 one-time fee

Check out KDSPY: Click Here

Read our full KDSPY review

5. KeywordTool.io


Often recognized as a top Amazon KDP Keyword Generator, KeywordTool.io specializes in Amazon keyword research and SEO for product listings.

Using this tool, users can tap into real-time Amazon suggestions and generate an extensive list of keywords.

Many perceive it as an optimal free alternative to Google Ads Keyword Planner for comprehensive keyword research, making it indispensable for authors on KDP.

Pricing: Pro $69/mo, Pro Plus $79/mo, Pro Business $159/mo (Free version available)

RELATED: Best KDP Interior Template Generators

6. Kindle Ranker

kindle ranker

Kindle Ranker is a powerful application that simplifies book marketing research. With Kindle Ranker, you can test your book ideas and search for new ones.

One of its key features is helping you find long tail keywords, which are important for discovering books on Amazon. Additionally, Kindle Ranker provides a free Amazon Book Sales Calculator that converts an author’s Amazon KDP bestseller rank into estimated Kindle sales per day.

This handy tool can give authors valuable insights into their book’s performance in the marketplace. If you’re looking for a reliable and efficient way to enhance your book marketing efforts, Kindle Ranker is definitely worth considering.

Pricing: Ranking Pro $7.99/mo, Kindle Master $12.99/mo

7. AMZ Suggestion Expander

AMZ Suggestion Expander

AMZ Suggestion Expander is a helpful tool for Amazon sellers and marketers.

It’s a Chrome extension that shows more keywords suggested by Amazon in the search bar. By using this extension, you can generate thousands of relevant keywords in real time.

This tool is free to use, making it an affordable option for those looking to improve their product visibility and increase sales on Amazon.

Whether you’re selling through FBA or KDP, AMZ Suggestion Expander can assist you in finding popular and relevant keywords for your products.

Pricing: Free

8. Helium 10

helium 10

Helium 10 is one of the best Amazon KDP keyword generators available. It offers a tool called Magnet2 Keyword Research, which helps you find relevant and high-traffic keywords based on just one seed keyword.

This can be really helpful in optimizing your book’s visibility on Amazon. The good news is that Helium 10 offers a free plan that gives you access to most of its paid tools, including the Magnet2 Keyword Research tool.

So even if you’re on a budget, you can still take advantage of this powerful keyword generator. Additionally, Helium 10 also provides another tool called Cerebro for conducting in-depth keyword research.

Pricing: Starter $29/mo, Platinum $79/mo, Diamond $229/mo

9. Ahrefs


Ahrefs is not just a keyword tool but a comprehensive SEO platform favored by digital marketers and content creators worldwide.

Renowned for its vast backlink database and intuitive site audit features, Ahrefs offers an unparalleled view into the intricacies of website optimization and competitor analysis.

Its keyword research capabilities extend beyond Amazon, catering to various search engines like Google, Bing, and YouTube, among others.

Users can glean insights into search volumes, keyword difficulties, and organic click-through rates, enabling them to craft content strategies that resonate with their target audience.

Moreover, the platform’s content explorer and rank tracker tools further empower users to monitor content performance and keep abreast of shifting search trends.

For those serious about elevating their online presence, Ahrefs proves to be an invaluable asset.

Pricing: Lite $89/mo, Standard $179/mo, Advanced $369/mo,  Enterprise $899/mo

Additional Keyword Research Tools

answer the public

In addition to the KDP keyword research tools mentioned above, there are several other keyword research tools that authors and publishers can use to optimize their book listings on Amazon.

These tools can help you find new and relevant keywords that you may have missed, and can also provide additional data and insights to help you make informed decisions about your keyword strategy.

Google Keyword Planner

Google Keyword Planner is a free tool that allows you to research and analyze keywords for your website or online content.

It provides data on search volume, competition, and suggested bid for each keyword, which can help you choose the most relevant and high-performing keywords for your book. This tool is particularly useful for authors and publishers who want to optimize their book listings for search engines like Google.

Bing Webmaster Tools

Bing Webmaster Tools is a free tool that allows you to analyze your website’s performance on Bing search engine.

It provides data on search queries, clicks, impressions, and other metrics that can help you optimize your website for Bing.

This tool can also help you identify new and relevant keywords that you may have missed, which can be used to optimize your book listings on Amazon.

Yahoo Search Marketing

Yahoo Search Marketing is a paid tool that allows you to research and analyze keywords for your online content.

It provides data on search volume, competition, and suggested bid for each keyword, which can help you choose the most relevant and high-performing keywords for your book.

This tool is particularly useful for authors and publishers who want to optimize their book listings for search engines like Yahoo.

YouTube Keyword Tool

YouTube Keyword Tool is a free tool that allows you to research and analyze keywords for your YouTube videos.

It provides data on search volume, competition, and suggested bids for each keyword, which can help you choose the most relevant and high-performing keywords for your videos.

This tool is particularly useful for authors and publishers who want to optimize their book trailers or promotional videos for YouTube.

Lists and AnswerThePublic

Lists and AnswerThePublic are free tools that allow you to discover new and relevant keywords based on popular search queries.

These tools generate lists of related keywords based on search volume, competition, and relevance, which can help you identify new and relevant keywords that you may have missed.

These tools are particularly useful for authors and publishers who want to optimize their book listings for long-tail keywords and specific niches.

Final Words:

In conclusion, finding the right keywords for your KDP books is crucial for maximizing visibility and sales on Amazon. There are many keyword research tools available in 2023, and each has its own unique features and functionalities.

Authors and publishers should consider using a combination of these tools to get the most comprehensive and accurate results.

It’s important to keep in mind that keyword research is an ongoing process, and authors and publishers should regularly update and refine their keywords to stay competitive in the ever-changing Amazon marketplace.

By using the right tools and staying up-to-date on industry trends, authors and publishers can greatly enhance their chances of success on Amazon.


What are KDP keyword generator tools?

KDP keyword generator tools help you find the best keywords for your Amazon Kindle Direct Publishing (KDP) books.

Are there any free Amazon keyword research tools?

Yes, there are free Amazon keyword research tools available online that can assist with finding effective keywords for KDP.

How does an Amazon keyword tool work?

An Amazon keyword tool helps by providing a list of popular search terms related to your book’s topic or genre, aiding in better visibility on the platform.

Can I use the KDP Keyword Finder without paying?

Yes! The KDP Keyword Finder is one of many excellent and free resources that help authors discover quality keywords for their eBooks quickly.