Finding the right keywords is one of the most important steps in growing a blog. You can publish helpful articles regularly, but if your topics do not match what people search for, attracting visitors from Google can be difficult.
The good news is that you do not need an expensive SEO subscription to start researching keywords. Several free keyword research tools for bloggers can help you discover topic ideas, understand what readers want, and identify opportunities for new articles.
These tools offer different features. Some show keyword ideas from Google searches, while others provide search volume estimates, related questions, competitor insights, or information about your website’s existing performance.
In this guide, we will explore 12 free keyword research tools, explain their main benefits, and show you how to use them to find useful keywords for your blog.
1. Google Keyword Planner
Google Keyword Planner is a keyword research tool available through Google Ads. Although it was designed primarily for advertising campaigns, bloggers can also use it to discover content ideas and estimate keyword demand.
It is a helpful starting point if you want to explore keywords related to your blog niche without immediately paying for an SEO platform.
Key features:
- Discover related keyword ideas.
- Review estimated monthly search volumes.
- Compare keyword trends.
- Explore keywords for different locations.
- Find terms related to products, services, and topics.
How to use it
Visit Google Keyword Planner and access the keyword planning features through your Google Ads account.
Choose the option to discover new keywords and enter a topic related to your blog. For example, a technology blogger might enter “free AI tools” or “website SEO checker.”
Review the suggestions and save relevant terms for further research.
Keep in mind that search volume estimates may appear as ranges, depending on your account and access. The competition metric mainly relates to advertising competition, not organic SEO difficulty.
Best for: Beginners who need keyword ideas and estimated search demand.
2. Google Search Console
Google Search Console is one of the most valuable free tools for bloggers who already have a website.
Unlike a general keyword research tool, it shows how your existing pages perform in Google Search. You can discover the actual search queries that generate impressions and clicks for your content.
Key features:
- Find search queries associated with your website.
- Review clicks and impressions.
- Check average click through rate.
- Monitor average search position.
- Identify pages that receive search visibility.
How to use it
Open Google Search Console and select your verified website.
Go to the Performance report and review the Queries tab. Look for relevant searches where your articles receive impressions but relatively few clicks.
You may discover related topics worth covering in new posts. You might also find existing articles that need better titles, clearer answers, or additional sections.
For example, if your article about AI tools receives impressions for “free AI tools for students,” you could improve the article or create a separate, genuinely useful guide focused on that audience.
Do not create a new article for every minor keyword variation. First check whether the queries share the same search intent.
Best for: Finding real search opportunities for an existing blog.
3. Google Trends
Google Trends helps bloggers understand how interest in a search topic changes over time.
It does not provide the same type of precise monthly search volume estimates as some keyword platforms, but it is useful for comparing topics and identifying seasonal patterns.
Key features:
- Compare search interest between topics.
- Explore regional interest.
- Identify seasonal trends.
- Discover related rising searches.
- Research topics for different time periods.
How to use it
Visit Google Trends and enter a keyword related to your niche.
For example, compare “AI video generator” with “AI image generator” to see how their relative search interest changes over time.
You can also change the location to the United States, United Kingdom, Canada, or Australia if you are researching readers in those markets.
Use the results to identify timely topics and decide when to publish seasonal content.
Google Trends uses a normalized interest score rather than reporting exact search counts, so combine it with other tools when estimating demand.
Best for: Trend research, seasonal content, and comparing topic popularity.
4. Ahrefs Free Keyword Generator
Ahrefs offers a free keyword generator that can help bloggers discover keyword ideas related to a starting topic.
It can be useful when you need more specific article ideas instead of broad terms that may be difficult to target.
Key features:
- Generate related keyword ideas.
- Explore question based searches.
- Review estimated search volumes for supported keywords.
- Check keyword difficulty estimates where available.
- Research terms for supported search engines.
How to use it
Visit the Ahrefs Free Keyword Generator and enter a keyword such as “free SEO tools.”
Review the suggestions and look for specific searches that match your blog’s expertise.
Instead of targeting only a broad phrase such as “SEO,” you might find opportunities around “free SEO tools for small business” or “how to check website SEO.”
These longer phrases can have more specific search intent, although you should still evaluate competition and demand before choosing them.
Free access and available metrics may be limited compared with the paid platform.
Best for: Discovering related keywords and exploring long tail opportunities.
5. Ubersuggest
Ubersuggest provides keyword research and SEO features that can help bloggers investigate search demand and competing pages.
Its free access may be limited by daily search allowances or other usage restrictions, so check the current plan before relying on it for large research projects.
Key features:
- Keyword suggestions.
- Estimated monthly search volume.
- Keyword difficulty estimates.
- Related keyword ideas.
- Selected competitor and content insights.
How to use it
Open Ubersuggest and enter your target keyword.
Review the related phrases, estimated search demand, and available competition metrics. Save promising ideas and compare them with the results shown directly in Google Search.
For example, if your blog covers digital marketing, you could research “free keyword research tools for beginners” and compare it with related phrases for bloggers and small businesses.
Treat all third party volume and difficulty figures as estimates rather than exact measurements.
Best for: Bloggers who want keyword ideas alongside basic SEO metrics.
6. Semrush Keyword Research Tools
Semrush offers keyword research features that help users investigate search demand, related phrases, and competing websites.
Some features have free account limits, while more extensive keyword databases and reports require a paid plan.
Key features:
- Keyword suggestions.
- Search volume estimates.
- Keyword difficulty metrics.
- Search intent information for supported reports.
- Competitor and content research.
How to use it
Visit Semrush and explore its available free keyword research tools.
Enter a topic related to your blog and review the suggestions. Compare different keyword variations and identify phrases that align with the purpose of your article.
If your blog targets the US market, select the appropriate country database when the tool offers that option.
Do not choose a keyword based only on its difficulty score. Review the current search results to understand what type of content Google ranks for the query.
Best for: Bloggers who want keyword research and competitor analysis in one platform.
7. AnswerThePublic
AnswerThePublic helps content creators explore questions and phrases that people associate with a topic.
It is particularly useful for bloggers who want to understand the questions readers may ask before writing a detailed guide.
Key features:
- Question based keyword ideas.
- Related phrases and topic suggestions.
- Content brainstorming.
- Search intent exploration.
- Topic discovery around a central keyword.
How to use it
Visit AnswerThePublic and enter a broad topic from your niche.
For a topic such as “keyword research,” the results may suggest questions about finding keywords, measuring search volume, and selecting low competition topics.
Use relevant questions to develop article headings, frequently asked questions, or separate posts when the search intent is sufficiently different.
The tool’s free usage may be limited.
Best for: Finding questions and developing comprehensive article outlines.
8. Keyword Tool
Keyword Tool generates keyword suggestions based on autocomplete data from supported platforms and search engines.
It can be useful for finding long tail phrases that people may enter into search boxes.
Key features:
- Keyword suggestions.
- Question and phrase ideas.
- Support for multiple platforms.
- Location and language options in supported features.
- Long tail keyword discovery.
How to use it
Visit Keyword Tool and enter a topic relevant to your blog.
If you write about smartphones, for example, you could research “how to improve phone battery life” and review the suggested variations.
Autocomplete suggestions can provide useful ideas, but they do not necessarily confirm how many people search for every phrase. Some volume and competition metrics may require a paid plan.
Best for: Expanding a list of article ideas with specific search phrases.
9. Google Autocomplete
Google Autocomplete is one of the simplest free keyword research methods available.
When you start typing a phrase into Google, the search box may display suggested completions based on several signals, which can include popular searches and your location.
Key features:
- Free keyword brainstorming.
- Related phrase discovery.
- Question and problem based ideas.
- Real time suggestions.
- No separate SEO subscription required.
How to use it
Open Google and enter a broad topic such as “best AI tools for.”
Observe the suggestions and try adding different words, including “beginners,” “students,” “business,” or “free.”
You can also try question starters such as “how to,” “what is,” and “which tool.”
Record relevant suggestions and review the actual search results for each promising phrase.
Autocomplete is a source of ideas, not a reliable measure of exact search volume or keyword difficulty.
Best for: Quick keyword brainstorming without creating an account.
10. Keyword Surfer
Keyword Surfer is a browser extension designed to support keyword research while browsing search results.
Depending on its current features and availability, it can display keyword related information directly within the search experience.
Key features:
- Keyword research while searching.
- Related keyword suggestions.
- Search volume estimates where supported.
- Content research assistance.
- Convenient browser based workflow.
How to use it
Visit the Keyword Surfer website and check its current installation and feature information.
After setting up the extension, search for a topic relevant to your blog and review the available keyword information.
Use the suggestions to expand your keyword list, then verify promising ideas using other tools and the search results themselves.
Remember that browser extensions can change their functionality and data access over time.
Best for: Bloggers who want keyword information while researching Google results.
11. AlsoAsked
AlsoAsked focuses on questions associated with Google’s People Also Ask results.
It can help bloggers understand how questions about a topic relate to one another and which subtopics may deserve attention.
Key features:
- Related question discovery.
- Topic relationships.
- Content planning assistance.
- Question based research.
- Ideas for article sections and supporting posts.
How to use it
Visit AlsoAsked and enter a relevant topic.
Review the question suggestions and group those that share a similar purpose. Use them to organize your content into logical sections.
For example, a post about free website SEO tools might address which tools are free, how to check indexing, and how to measure website speed.
Avoid adding every question simply to make the article longer. Include questions that genuinely help your target reader.
Free access and search allowances may vary.
Best for: Creating detailed outlines and finding related reader questions.
12. Moz Keyword Explorer
Moz Keyword Explorer provides keyword research data and difficulty estimates to help bloggers evaluate possible topics.
Its free access is limited compared with paid plans, but it can still be useful for initial research when available.
Key features:
- Keyword suggestions.
- Estimated search volume.
- Keyword difficulty estimates.
- Related topics and phrases.
- Opportunity analysis using available metrics.
How to use it
Visit Moz Keyword Explorer and enter a keyword you are considering for an article.
Review the available metrics and related keyword suggestions. Compare several terms rather than relying on one score.
For a new blog, look for a useful balance between topic relevance, reasonable demand, and a search results page where your website could offer something valuable.
Best for: Evaluating keyword opportunities and comparing possible article topics.
Comparison of the Best Free Keyword Research Tools
The following table summarizes the main purpose of each tool. Search limits and available data depend on the provider’s current offering.
| Tool | Best use | Free access |
|---|---|---|
| Google Keyword Planner | Keyword ideas and volume estimates | Yes, account and access conditions apply |
| Google Search Console | Existing search queries | Yes, for verified properties |
| Google Trends | Trends and seasonal interest | Yes |
| Ahrefs Keyword Generator | Related keywords and difficulty estimates | Limited free features |
| Ubersuggest | Keyword metrics and suggestions | Limited free usage |
| Semrush | Keyword and competitor research | Limited free access |
| AnswerThePublic | Questions and content ideas | Limited free usage |
| Keyword Tool | Autocomplete based suggestions | Limited free features |
| Google Autocomplete | Quick keyword brainstorming | Yes |
| Keyword Surfer | Browser based keyword research | Check current extension features |
| AlsoAsked | Related questions | Limited free usage |
| Moz Keyword Explorer | Keyword suggestions and difficulty | Limited free queries |
How to Find Low Competition Keywords for Your Blog
Finding low competition keywords can be especially helpful if your blog is new or has limited search visibility. However, no tool can guarantee that a keyword will be easy to rank for.
Use the following process to identify opportunities.
Step 1: Start with your blog niche
Choose a broad subject that fits your website.
For example, a technology blog might focus on AI tools, smartphone tutorials, website software, or online productivity tools.
A clear niche makes it easier to build relevant content and connect related articles.
Step 2: Generate keyword ideas
Use Google Autocomplete, Google Keyword Planner, Ahrefs, or another keyword research tool to create an initial list.
Start with a broad phrase and explore more specific versions.
For example:
- Free SEO tools
- Free SEO tools for beginners
- Free website SEO checker
- Free SEO tools for small business
- How to check website SEO for free
These phrases have different levels of specificity and may reflect different search needs.
Step 3: Check search demand
Review available search volume estimates and Google Trends data.
If a keyword has little measured demand, it may still be worth targeting if it answers an important question for your audience. However, do not assume that every specific phrase will attract significant traffic.
Step 4: Review keyword difficulty
Some tools provide a keyword difficulty score, but different providers use different methods to calculate it.
A KD score below 20 can be a useful initial filter if you use a tool with that scale. It is not a guarantee of low competition.
Review the actual search results to see whether the ranking pages are strong, relevant, comprehensive, and up to date.
Step 5: Analyze search intent
Search intent describes what people want to accomplish when they enter a query.
For example:
- “What is keyword research?” usually indicates informational intent.
- “Best keyword research tools” suggests comparison and research intent.
- “Keyword research software pricing” often indicates commercial investigation.
Choose a format that answers the searcher’s need.
Step 6: Create a useful article
Write an article that fully answers the question without adding unnecessary sections.
Use a descriptive title, clear headings, examples, relevant images, and internal links to related content.
Do not repeat the target keyword unnaturally. Related terminology and a clear explanation are more useful than keyword stuffing.
Step 7: Track results
After publishing, use Google Search Console to review impressions, clicks, and search queries.
If the page begins receiving impressions for relevant terms, you can improve its content based on the questions and queries that appear.
Give the page enough time to collect meaningful data before making major changes.
Common Keyword Research Mistakes Bloggers Should Avoid
Choosing keywords only because they have high volume
High volume keywords often attract strong competition. A smaller, more specific keyword can be a better fit for a new website if it matches the content and audience.
Trusting every keyword difficulty score
Difficulty scores are estimates. They do not fully account for your expertise, content quality, website reputation, search intent, or the specific pages ranking for a query.
Ignoring the search results
Before writing, examine the current results. If Google ranks tutorials, create a tutorial. If the results mostly contain product comparisons, consider a comparison article instead.
Targeting the same keyword with many articles
Publishing multiple pages that answer the same question can make it harder to decide which page should serve that search intent.
Group related keywords into a single comprehensive article when appropriate. Create separate pages only when they serve distinct reader needs.
Forgetting to update existing content
Keyword research is not just for new posts. Your existing articles may have opportunities to cover related questions, improve titles, or provide more complete answers.
Use Search Console to identify those opportunities.
Frequently Asked Questions
What are the best free keyword research tools for bloggers?
Google Keyword Planner, Google Search Console, Google Trends, Google Autocomplete, and Ahrefs’ free keyword generator are useful starting points. The best choice depends on whether you need keyword ideas, existing search data, trends, or difficulty estimates.
Can I find low competition keywords for free?
Yes. You can combine free keyword suggestions with search result analysis to identify potentially less competitive topics. Some free tools also offer difficulty estimates, although usage and metric availability may be limited.
Which free keyword tool shows search volume?
Google Keyword Planner provides estimated monthly search volumes, often as ranges depending on account access. Some third party tools provide estimates as well, but figures may differ between providers.
How many keywords should I target in one blog post?
Choose one primary topic and a group of closely related secondary keywords. Include these naturally where they help readers understand the subject. There is no fixed number that guarantees higher rankings.
Are free keyword research tools enough for SEO?
Yes, free tools are sufficient to begin researching topics, checking existing search performance, and planning content. Paid tools can offer more extensive databases and reporting, but they do not replace good content or careful research.
How often should bloggers perform keyword research?
Research keywords whenever you plan new content and revisit existing pages periodically. You may also want to review your strategy when search demand changes or your website begins ranking for unexpected queries.
Conclusion
Free keyword research tools for bloggers make it easier to discover content ideas, understand search intent, and plan articles around real reader needs.
Start with Google Keyword Planner for keyword ideas, Google Search Console for your existing performance, and Google Trends for changes in interest. Add tools such as Ahrefs, Semrush, or AnswerThePublic when you need additional suggestions or more detailed research.
You do not need to use every platform. Choose a few tools, create a focused keyword list, and evaluate each opportunity before writing.
The best keyword strategy combines useful research with original, helpful content. By understanding what your audience needs and consistently publishing articles that meet those needs, you can build a stronger foundation for long term organic traffic.