Table of Contents
- Introduction
- Why Keyword Research Matters for KDP
- Best Free Keyword Research Tools for KDP
- How to Find the Main Keyword on Amazon (Step by Step)
- Can You Use ChatGPT for Keyword Research?
- Is Ahrefs Keyword Research Free?
- Common Mistakes & Troubleshooting
- Best Practices for KDP Keyword Research
- Conclusion & CTA
- FAQ – Free Keyword Research Tool for KDP
Introduction
Choosing the right keywords is one of the most important steps in Amazon KDP success. Without proper keyword research, even the best-designed book cover and content won’t be discovered.
Many beginners ask: “Is there any free keyword research tool for KDP?”
The short answer is yes — and you don’t need expensive software to get started.
In this guide, you’ll learn how to use the best free keyword research tools for KDP, how to find real Amazon buyer keywords, estimate KDP keyword search volume, and avoid the most common mistakes new publishers make.
Why Keyword Research Matters for KDP
Amazon works differently from Google. It’s a buyer-driven search engine, which means people searching are usually ready to purchase.
Good keyword research helps you:
- Rank your book in Amazon search
- Reach the right audience
- Increase organic sales
- Reduce ad costs
- Build long-term visibility
That’s why using a free Amazon keyword research tool correctly is more important than using a paid tool blindly.
Best Free Keyword Research Tools for KDP
Below are the best free keyword research tools for KDP that actually work in 2025.
1. Helium 10 – Free Amazon Keyword Tool
🔗 https://www.helium10.com/tools/free/amazon-keyword-tool/
Helium 10’s free tool allows you to enter a keyword or ASIN and receive Amazon-related keyword ideas.
Best for:
- Discovering keyword variations
- Beginners testing niches
Limitations:
- Daily search limits
- Advanced metrics require a paid plan
2. KeywordTool.io (Amazon)
🔗 https://keywordtool.io/amazon
This tool extracts Amazon autocomplete suggestions, which are based on real buyer searches.
Best for:
- Long-tail keyword discovery
- Title and subtitle ideas
Tip: Pair it with Amazon manual validation for best results.
3. Trellis – Free Amazon Keyword Research Tool
🔗 https://gotrellis.com/tools/amazon-keyword-research/
Trellis provides estimated search volume, competition, and PPC data.
Best for:
- Understanding keyword competitiveness
- Choosing lower-risk keywords
4. Keywords Everywhere
🔗 https://keywordseverywhere.com/
A browser extension that shows estimated keyword data while searching Amazon and other platforms.
Best for:
- Quick volume comparison
- On-page research
5. Seodity – Free Amazon Keywords Finder
🔗 https://seodity.com/free-amazon-keywords-finder
Seodity offers a clean interface with keyword difficulty and volume estimates.
Best for:
- Beginners
- Quick keyword validation
6. AsinSeed – Free Reverse ASIN Tool
🔗 https://www.asinseed.com/en/
AsinSeed allows you to extract keywords from competitor ASINs.
Best for:
- Stealing proven keywords
- Competitive research
How to Find the Main Keyword on Amazon (Step by Step)
This is the exact process many KDP publishers use.
Step 1: Start with Amazon Search Bar
Type your topic and note autocomplete suggestions.
Step 2: Expand with Free Tools
Use KeywordTool.io, Helium 10, or AsinSeed to collect variations.
Step 3: Check Competition
Click top results and check:
- Number of reviews
- Relevance
- Book quality
Step 4: Choose One Main Keyword
This keyword goes in:
- Book title
- Subtitle
- Description (naturally)
- Backend keywords
Can I Use ChatGPT for Keyword Research?
Yes — but only as a support tool.
ChatGPT is useful for:
- Generating keyword ideas
- Expanding long-tail phrases
- Organizing keyword clusters
❗ Important: ChatGPT does not show real Amazon search volume. Always validate keywords using Amazon-based tools.
Is Ahrefs Keyword Research Free?
No. Ahrefs is mainly designed for Google SEO, not Amazon KDP, and offers very limited free access.
For Amazon-focused research, the tools listed above are far more useful and free.
Common Mistakes & Troubleshooting
❌ Using Google-only keywords
❌ Targeting extremely competitive terms
❌ Keyword stuffing
❌ Ignoring relevance
❌ Not checking competitors
Fix: Focus on buyer intent and long-tail keywords.
Best Practices for KDP Keyword Research
✔ Use Amazon autocomplete first
✔ Validate with at least one free tool
✔ Choose long-tail buyer keywords
✔ Avoid repeating keywords unnecessarily
✔ Update keywords periodically
Bonus: Optimize Your KDP Assets with Free Tools (Internal Links)
Keyword research is only half the job. Your book visuals and metadata also matter.
Here are free tools on Darekdari you should use:
🔹 Compress Book Covers & Images
👉 https://darekdari.com/image-compressor-resize-compress-online-free/
Reduce image size without losing quality — perfect for:
- KDP covers
- A+ content
- Website uploads
🔹 Remove Backgrounds from Images
👉 https://darekdari.com/free-background-remover/
Great for:
- Book mockups
- Promo images
- Ads and thumbnails
🔹 Format Titles & Keywords Properly
👉 https://darekdari.com/text-case-converter-online-free/
Use this tool to:
- Fix title capitalization
- Format subtitles
- Clean backend keywords
These tools are 100% free and extremely useful for KDP publishers.
Conclusion & CTA
Using the right free keyword research tool for KDP can completely change how your book performs on Amazon. You don’t need expensive software to succeed — what matters is understanding buyer intent and using free Amazon keyword research tools for KDP correctly. By combining Amazon autocomplete with tools like Helium 10 Free, KeywordTool.io, Trellis, and AsinSeed, you can build a strong keyword strategy, estimate KDP keyword search volume, and target low-competition terms that help your book rank organically.
If you are serious about publishing, mastering keyword research with the best free keyword research tool for KDP should be your first step. Start small, validate your keywords, optimize your listing, and improve your visuals using free tools. With the right free Amazon keyword research tool, consistent optimization, and smart execution, even new KDP authors can compete and succeed in crowded Amazon niches.
You don’t need expensive software to succeed on Amazon KDP. By combining free keyword research tools like Helium 10, KeywordTool.io, Trellis, and AsinSeed — and optimizing your assets using Darekdari’s free tools — you can compete professionally from day one.
👉 Next step:
Choose one keyword tool today, research 20–30 keywords, and optimize your next KDP book properly.
Finding the right keywords is one of the most important steps when publishing on Amazon, which is why choosing a reliable free keyword research tool for KDP is essential for beginners and experienced authors alike. Many new publishers assume they need expensive software to do Amazon keyword research, but in reality, there are several free Amazon keyword research tools for KDP that provide accurate keyword ideas, buyer-intent phrases, and even estimated search volume. By using the best free keyword research tool for KDP, you can identify profitable niches, understand what readers are searching for, and optimize your book listing without spending money upfront.
FAQ – Free Keyword Research Tool for KDP
1. Is there any free keyword research tool?
Yes. Amazon autocomplete, Helium 10 Free, Trellis, Seodity, and AsinSeed.
2. What is the best free keyword research tool for KDP?
Amazon autocomplete + Helium 10 Free + AsinSeed.
3. Can I use ChatGPT for keyword research?
Yes, for ideas only — not for real search volume.
4. How to find main keyword on Amazon?
Use autocomplete, validate competition, and pick a buyer-intent keyword.
5. Is Ahrefs keyword research free?
No, and it’s not Amazon-focused.
6. What is KDP keyword search volume?
An estimate of how often a keyword is searched on Amazon.
7. Is there a free Amazon keyword search volume tool?
Trellis and Keywords Everywhere provide estimates.
8. Do images affect KDP sales?
Yes. Use Darekdari’s image compressor and background remover to improve visuals.
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