Finding the right keywords is the backbone of any successful Amazon selling strategy. Without proper keyword research, your products may remain invisible to potential buyers. Fortunately, you don't need to spend a fortune on expensive tools to get started. Here are the best free keyword research tools for Amazon that can help you uncover high-volume, low-competition keywords and boost your organic rankings.
Amazon's own search bar is one of the most underrated free keyword tools. When you start typing a product-related term, Amazon automatically suggests popular search phrases. For example, typing "yoga mat" will show suggestions like "yoga mat extra thick," "yoga mat non slip," and "yoga mat for men." These suggestions are based on actual customer searches, giving you direct insight into what buyers are looking for.
How to use it: Simply open Amazon.com, type your core product keyword, and note down the suggested phrases. Repeat this process for multiple seed keywords to build a comprehensive list.
Sonar is a completely free Amazon keyword research tool that provides search volume data, related keywords, and even competitor analysis. It pulls data directly from Amazon's search engine, making it highly accurate. You can enter a keyword and get hundreds of related terms with their search frequency (monthly volume) and competition level.
Key features:
While Keyword Planner is designed for Ads, it can be surprisingly useful for Amazon sellers. Many customers research products on before buying on Amazon. By identifying high-search-volume terms on you can optimize your Amazon listings for those same phrases.
How to adapt it: Use Keyword Planner to find general search trends, then cross-reference those terms with Amazon's autocomplete to confirm they are used on the platform.
Ubersuggest offers a limited free tier that includes keyword ideas, search volume, and SEO difficulty scores. While it's primarily a tool, the keyword suggestions are often transferable to Amazon. For example, if you sell "wireless earbuds," Ubersuggest can show you related queries like "best wireless earbuds for running" or "affordable wireless earbuds," which are also popular on Amazon.
Helium 10 is a premium suite, but they offer several free tools that are extremely valuable for Amazon keyword research. The Free Keyword Tracker and Free ASIN Lookup tools allow you to see estimated search volumes and identify which keywords your competitors are ranking for.
Notable free features:
KWFinder offers a free trial that includes 10 keyword lookups per day. This is enough to get started with seed keywords. The tool provides search volume, trend data, and related keywords. While it's built for the long-tail keyword suggestions are often highly relevant for Amazon listings.
This free tool generates questions and phrases related to your keyword. For Amazon sellers, this is gold because it reveals the exact questions customers are asking. For example, searching "shoe organizer" might show "how to organize shoes in a small closet" or "best shoe organizer for boots." These questions can be turned into product titles, bullet points, or even blog content to drive traffic.
Identify 3–5 core keywords that describe your product. For example, if you sell "portable Bluetooth speakers," your seed keywords could be "wireless speaker," "portable speaker," "Bluetooth speaker," and "waterproof speaker."
Use Amazon Autocomplete, Sonar, or Ubersuggest to generate hundreds of related keywords. Focus on long-tail keywords (3–5 words) because they have lower competition and higher conversion rates.
Use Helium 10's free ASIN lookup to see which keywords your top competitors are ranking for. This can reveal gaps in your own strategy.
Not all keywords are equal. Look for terms with moderate search volume (say 500–5,000 searches per month) and low competition. These are your "sweet spot" keywords.
Once you have your final keyword list, incorporate them into your product title, bullet points, product description, and backend search terms. Make sure the copy reads naturally—keyword stuffing hurts both readability and ranking.
You don't need to spend hundreds of dollars on keyword research tools to succeed on Amazon. By combining free resources like Amazon Autocomplete, Sonar, and Keyword Planner, you can build a robust keyword strategy that drives organic traffic and sales. Start with these tools today, and you'll be well on your way to ranking higher on Amazon's search results without breaking the bank.
For more detailed insights and product-specific keyword strategies, you can explore resources like Dreamfulfill which offers curated guides for Amazon sellers looking to optimize their listings and grow their business.