Top 10 Free Keyword Research Tools in 2025
Keyword research is a critical part of SEO and content strategy, but it doesn’t have to be expensive. Whether you’re a blogger, affiliate marketer, or small business owner, there are plenty of free tools in 2025 that offer powerful keyword insights.
In this article, we’ll explore the top 10 free keyword research tools that you can start using today to boost your organic traffic.
1. Google Keyword Planner
Best for: Beginners and advertisers
Google Keyword Planner is a free tool designed mainly for advertisers, but it’s also very useful for SEO. You can enter a keyword and get search volume, competition level, and keyword suggestions.
Pros: Reliable data, integrates with Google Ads
Cons: Requires a Google Ads account (free to set up)
2. Ubersuggest by Neil Patel
Best for: Bloggers and small businesses
Ubersuggest is a user-friendly tool that offers keyword suggestions, SEO difficulty scores, and content ideas. It also shows top-ranking pages and backlinks.
Pros: Easy to use, content ideas, SEO audit
Cons: Limited free searches per day
3. AnswerThePublic
Best for: Finding question-based keywords
AnswerThePublic visualizes what people are asking on Google. Just enter a keyword, and it gives you questions, prepositions, and comparisons that include your keyword.
Pros: Excellent for content ideas
Cons: Free version has daily limits
4. Keyword Surfer (Chrome Extension)
Best for: Real-time keyword data in Google search
Keyword Surfer is a Chrome extension that shows search volume directly in the Google search bar. You also get related keyword suggestions in the sidebar.
Pros: Lightweight, works directly in Google
Cons: Only available on Chrome browser
5. Moz Keyword Explorer (Free Version)
Best for: Basic keyword SEO metrics
Moz offers limited free use of their powerful keyword research tool. It includes monthly search volume, difficulty, and opportunity scores.
Pros: Clean interface, keyword suggestions
Cons: Free account has usage limits
6. Soovle
Best for: Multi-platform keyword ideas
Soovle combines autocomplete suggestions from Google, YouTube, Amazon, Wikipedia, Bing, and more. It’s a great tool for brainstorming.
Pros: Fast and simple, covers many platforms
Cons: No SEO metrics like volume or difficulty
7. Google Trends
Best for: Trend tracking and seasonal keywords
Google Trends shows how interest in a keyword changes over time. You can compare keywords and spot seasonal trends or rising topics.
Pros: Great for trending topics
Cons: No volume data, only relative popularity
8. Ahrefs Free Keyword Generator
Best for: Quick keyword ideas and difficulty
Ahrefs offers a free version of their keyword generator that provides up to 100 keyword suggestions and shows keyword difficulty.
Pros: Trusted SEO tool brand
Cons: Limited to a few searches per day
9. Keyword Sheeter
Best for: Fast keyword generation
Keyword Sheeter pulls thousands of Google autocomplete suggestions in seconds. It’s ideal for generating a huge list of keywords quickly.
Pros: Extremely fast and free
Cons: Raw data, no volume or competition metrics
10. SEOStack Keyword Tool
Best for: Bulk keyword suggestions
This is a Chrome extension that scrapes keyword suggestions from multiple search engines. It’s great for affiliate marketing, SEO, and content planning.
Pros: Bulk suggestions, export options
Cons: No SEO scoring in free version
Conclusion
You don’t need to pay for premium tools to do powerful keyword research. These 10 free keyword research tools offer valuable insights, whether you're looking for blog topics, SEO optimization, or PPC campaign ideas.
Start testing them today and find which ones best suit your goals. You can even combine multiple tools to get more comprehensive results.