10 Free Keyword Research Tools Every Marketer Should Try

Effective keyword research is the foundation of successful digital marketing. Whether you’re running an ecommerce site, growing a blog, or boosting a local service, understanding which words and phrases your customers are searching for is crucial. While premium SEO platforms offer expansive features, there are powerful free keyword research tools that can help marketers and business owners uncover valuable insights—without breaking the bank.

This post introduces ten of the best free keyword research tools. These resources can guide your content strategy, improve your search visibility, and help you reach the right audience. All are accessible for beginners, with enough robustness for professionals, too.

Why Keyword Research Matters

Search engine optimization (SEO) is more nuanced than simply plugging in a few obvious search terms. Knowing what your potential customers are actually looking for, and how competitors are targeting those phrases, informs everything from on-page content to paid advertising campaigns.

• Discover hidden opportunities: Effective research reveals less competitive niches.
• Align with user intent: Target words and questions your audience is really using.
• Increase qualified traffic: Bring visitors who are more likely to convert.
• Refine content strategy: Build editorial calendars around proven demand.

Let’s explore ten of the best free keyword research tools available today.

1. Google Keyword Planner

Best For: Understanding search volume and finding new keyword variations, especially if you plan to run Google Ads.

Google Keyword Planner is part of the Google Ads platform. While it’s geared towards advertisers, it’s equally valuable for organic keyword discovery. It allows you to:

• Access average monthly search volumes
• View competition level estimates
• Discover related keyword suggestions

One caveat: you’ll need to create a Google Ads account (you do not have to run an active campaign). For broader results, avoid narrowing your search to specific locations unless targeting a local audience.

2. Answer the Public

Best For: Content inspiration based on actual questions and searches.

Answer the Public visualizes and lists questions, prepositions, and phrases people commonly search around a given keyword. This helps marketers:

• Understand user intent
• Find “how,” “what,” and “why” type queries
• Generate content ideas in bulk

The free version offers limited daily searches but remains a favorite for brainstorming blog topics and understanding conversational terms.

3. Ubersuggest

Best For: Quick keyword ideas and basic difficulty assessments.

Originally built as a Google Suggest scraper, Ubersuggest now provides:

• Keyword suggestions with estimated volume
• Basic competition scores (SEO difficulty)
• Top-performing pages for your target keywords

You’ll get a handful of searches per day for free; signing up with a Google account gives slightly more. Ubersuggest is especially useful for small businesses and solopreneurs who need a lightweight, easy-to-use research solution.

4. Google Trends

Best For: Identifying trending topics, seasonality, and keyword comparison.

Google Trends isn’t a traditional keyword research tool, but it’s invaluable for:

• Comparing the relative interest in multiple keywords over time
• Spotting surges or declines in keyword popularity
• Identifying breakout search terms

This helps businesses align their content and campaigns with current interests, or prepare for seasonal spikes in demand.

5. Keyword Generator by Ahrefs

Best For: Quick keyword ideas from a trusted SEO brand.

Ahrefs offers a limited but powerful free tool called Keyword Generator. With it, you can:

• Receive the top 100 keyword ideas for any seed term
• See estimated monthly search volumes and keyword difficulty (limited data available without a paid plan)
• Get questions people are asking related to your keyword

This is a fast way to validate ideas or build a keyword list for initial research, especially if you don’t subscribe to a paid SEO tool.

6. Keywords Everywhere

Best For: On-the-fly keyword insights built into your browser.

Keywords Everywhere is a browser extension (Chrome & Firefox) that displays search volume, CPC, and competition data directly in search engine result pages (SERPs) and on many popular keyword research sites.

• See insights without leaving the search engine
• Export lists of suggestions and related keywords

Note: The extension is technically “freemium.” You get access to related keywords and other data points for free, but search volume metrics require purchasing credits. However, its suggested keywords feature remains useful for free users.

7. AlsoAsked

Best For: Uncovering “People Also Ask” queries for richer content and FAQs.

AlsoAsked scrapes Google’s “People Also Ask” results, revealing the follow-up questions people have about your chosen topic. Key benefits include:

• Finding clusters of questions for target keywords
• Structuring content to address multiple search intents
• Building FAQ sections for SEO and user benefit

This tool allows a handful of free searches per month and is ideal for mapping out content hierarchies or enhancing product/service pages.

8. Moz Keyword Explorer

Best For: Combining search volume with difficulty and organic CTR insights.

Moz’s Keyword Explorer provides up to 10 free queries per month without a paid account. For each keyword, it shows:

• Monthly search volume
• Difficulty scores
• Organic CTR (click-through rate) opportunity

Though limited in daily searches, it’s an excellent way to validate and prioritize keywords.

9. Google Search Console

Best For: Discovering real keywords your site already ranks for.

Google Search Console is essential for every webmaster, but it’s also a potent keyword research tool. It reveals:

• Search queries users actually use to find your site
• Impressions, clicks, and average position for each keyword
• Opportunities to build on what’s already working

Analyzing your “Queries” report can highlight hidden opportunities and help you optimize content to attract even more relevant traffic.

10. Keyword Sheeter

Best For: Brainstorming large lists of keyword ideas in seconds.

Keyword Sheeter rapidly generates hundreds or even thousands of autocomplete suggestions from Google. Use it to:

• Build extensive starter keyword lists quickly
• Uncover long-tail variants and niche opportunities

Export the results as a spreadsheet for further filtering and analysis. The volume and simplicity make it ideal for initial ideation.

Tips for Using Free Keyword Tools Effectively

Each tool has its strengths and limitations. Some offer more insights than others or restrict the number of free searches per day. Here’s how to get the most value from your research:

• Combine multiple tools to cover gaps in data and perspective.
• Focus on intent, not just volume. Sometimes lower-volume keywords lead to higher conversions if they match what your customers really want.
• Monitor ongoing performance. Use Search Console to see which keywords are driving traffic and spot new opportunities.
• Refresh your keyword list regularly. Search behavior changes. Update your research every few months or in response to seasonality and market trends.

Conclusion

Keyword research doesn’t have to be expensive. With the ten free tools above, small business owners and marketers can uncover valuable phrases, observe search trends, and strengthen their content strategy—often without needing a paid subscription.

By starting with these free resources, you can discover new market opportunities, align your messaging with your audience’s real needs, and improve your visibility in organic search. As your business grows, these insights lay the groundwork for sustainable digital marketing success.

If you need help with your website, app, or digital marketing — get in touch today at info@webmatter.co.uk or call 07546 289 419.