Some of the sharpest keyword research we have ever done cost nothing at all.
That is not an argument for skipping paid tools forever. Premium platforms earn their price once you are publishing regularly and competing for real money. But if you are staring at a $139 monthly invoice before you have written your first article, you are solving the wrong problem first. Free tools can validate whether a topic has demand, surface the long-tail phrasing people actually type, and show you what your site already ranks for. That is enough to build a content plan around.
The catch is that “free” means something different in every one of these tools. One gives you unlimited use with no account. One hides its best numbers behind ad spend. One gives you three searches a day and then politely asks for a card. Knowing which wall you are about to hit matters more than knowing which tool has the biggest database.
We tested every option below on the free tier only, the way a beginner would. Free tools sit at one end of the SEO tools spectrum, and knowing exactly where they stop is the point of this guide.
How We Selected These Tools
We only scored what the free version actually delivers. No trials, no tiers that expire after seven days, and no credit for features you have to pay to reach. A trial is not a free tier.
Every tool went through the same checks: how many searches before you hit a wall, whether an account or card is required, whether the data is primary source or estimated, how usable the output is without an export, and how honest the upgrade path feels. Tools that failed one check badly were left out rather than padded in to hit a round number. Our full process is documented in how we review software.
One note on honesty: we used most of these ourselves over the past year of ordinary content work. Where a claim comes from vendor documentation rather than our own hands-on testing, we say so. Free tiers change faster than paid plans, so treat every limit below as accurate at the time of writing.
Quick Comparison Table
| Tool | Best For | Free Plan | Upgrade Available | Rating |
|---|---|---|---|---|
| Keywords Everywhere | Research inside your normal browsing | 18 free features, no credits, no signup | Yes, credits from $84/year | 4.5 / 5 |
| Google Search Console | Keywords you already almost rank for | Unlimited, free forever, own site only | No paid tier | 4.7 / 5 |
| Google Keyword Planner | Primary-source demand data | Unlimited searches, volume as ranges | Precision unlocks with ad spend | 4.0 / 5 |
| Google Trends | Seasonality, rising queries, timing | Unlimited, now with a Gemini side panel | No paid tier | 4.4 / 5 |
| Ahrefs Free Keyword Generator | Fast idea lists with difficulty scores | No login, around 100 ideas per search | Yes, Starter from $29/month | 4.3 / 5 |
| Keyword Surfer | Volume inside search results | Free, no account, no daily cap | Only for Surfer’s paid writing tools | 4.2 / 5 |
| Bing Webmaster Tools | Real impression data nobody checks | Unlimited, free, no cap | No paid tier | 4.1 / 5 |
| Semrush Free Tools | Sampling a full platform’s data | Around 10 lookups per day, one project | Yes, Pro from $139.95/month | 4.0 / 5 |
| Moz Keyword Explorer | Exact volume without paying | Small monthly query allowance | Yes, from around $39/month | 3.8 / 5 |
| AnswerThePublic | Question mapping and angles | 3 searches per day | Yes, from around $9 to $15/month | 3.5 / 5 |
The Best Free Keyword Research Tools
1. Keywords Everywhere
Keywords Everywhere earns its place for one unglamorous reason: it removes the copy-paste step. You search on Google the way you already do, and the data appears on the page.
Most people assume it is fully paid because it stopped giving away search volume in 2019. That is only half true now. The extension ships with eighteen features that use no credits at all.
Best for
Bloggers and freelancers who want research to happen inside their normal browsing rather than in a separate tab.
Free plan overview
No signup needed for the free layer. You get related keywords, People Also Search For terms, long-tail ideas, SEO difficulty plus on-page and off-page difficulty scores, AI reports with keyword clusters and intent, traffic estimates and top ranking keywords for any domain you visit, Moz link metrics, and over two hundred AI prompt templates. Paid credits run from $84 to $1,440 per year, billed annually, at one credit per keyword lookup.
- ✓ Zero friction. Data appears where you are already looking, which sounds minor until you have done fifty lookups in an afternoon.
- ✓ Difficulty scores are free, which is unusual. Most free tools give you ideas or difficulty, not both.
- ✓ The domain keyword lists are the sleeper feature for quick competitor research at no cost.
- − No free search volume in the extension. Difficulty and ideas are free, but search volume, CPC, and trend charts require a paid plan.
- − Desktop only. Chrome, Firefox, and Edge are supported, but there is no Safari version or mobile app.
- − The competition metric comes from Google Ads, so it reflects advertiser demand rather than organic ranking difficulty.
- − Annual billing only, so the lowest-cost paid option still requires a full year’s commitment.
2. Google Search Console
If your site has been live more than a couple of months, this is the most valuable free keyword tool in existence, and most beginners barely open it. Every other tool here estimates what people search for. Search Console tells you what people searched for and then landed on your site.
Best for
Anyone with an existing site who wants their next win without starting from zero.
Free plan overview
Free, permanent, unlimited, requires verifying site ownership. Sixteen months of query data showing impressions, clicks, average position, and click-through rate, filterable by page, country, device, and date. Since 3 June 2026 there is also a separate Search Generative AI performance report covering AI Overviews and AI Mode.
The workflow that pays off fastest: sort queries by impressions, then filter for average position between eight and twenty. Those are keywords Google already thinks you are relevant for but is not quite ready to rank. Improving an existing page for them beats writing something new almost every time.
- ✓ It is your own measured data. No modelling, no extrapolation, and no estimated ranges.
- ✓ It finds keywords no research tool would suggest because it reflects the real searches that brought people to your site.
- ✓ Position and CTR together make it easy to spot pages that need better titles rather than better rankings.
- − Useless for a brand-new site because no traffic means no keyword data.
- − Your own site only. There is no competitor keyword research.
- − Query data is sampled and capped. Low-impression terms are filtered out, and exports are limited to 1,000 rows.
- − The AI report is still thin. It shows impressions but not clicks or query data, so you cannot see what triggered an AI Overview appearance.
3. Google Keyword Planner
Keyword Planner is built for advertisers, which is why SEOs should use it and also why it frustrates them. The data comes from Google’s own query logs rather than a third-party model. Nothing else here can say that. The trade-off is that Google saves the precise numbers for people spending money on ads.
Best for
Checking demand against the source, and spotting keywords with genuine commercial value.
Free plan overview
Free with a Google Ads account, no campaign required. Unlimited keyword idea searches, volume shown as ranges, ad competition levels, top-of-page bid estimates, country and language filters, plus historical and seasonal data. Precision improves once you have consistent ad spend.
Who should use it and when to upgrade
Everyone, as a cross-check rather than a primary tool. You do not upgrade Keyword Planner, you supplement it. The moment ranges start costing you decisions, add something that reports exact figures.
4. Google Trends
Trends does not give you search volume, and people hold that against it unfairly. It answers a different question: is interest rising or dying, and when does it peak? A keyword with modest volume climbing steadily beats a bigger one in slow decline.
This tool changed meaningfully in January 2026. Google added a Gemini-powered side panel to the Explore page that suggests and charts related terms automatically, raised the comparison limit to eight terms, and doubled the rising queries shown on each timeline. You type an area of interest in plain language and it builds the comparison instead of making you guess terms one at a time. It launched on desktop and reached mobile web a few months later.
Best for
Timing content, catching rising queries early, and planning seasonal work.
Free plan overview
Entirely free, no account, no limits. Relative interest on a 0 to 100 scale back to 2004, regional breakdowns to city level, related and rising queries, comparison of up to eight terms, category and search-type filters including YouTube, Trending Now for real-time topics, and the Gemini side panel.
- ✓ Rising queries are close to a cheat code. Fast-growing topics often have little competition because the major keyword databases have not caught up.
- ✓ Seasonality is visible instantly. Viewing five years of data makes recurring trends easy to spot and helps you time content publication.
- ✓ The Gemini panel saves time by removing much of the manual exploration at the start of keyword research.
- − No absolute search volume. The 0–100 scale is relative, so a score of 100 could represent ten searches or ten million.
- − Thin data on low-volume keywords. Many niche long-tail terms return little or no useful information.
- − AI suggestions are experimental. Google labels them accordingly, and they are not always accurate.
- − It cannot replace a keyword research platform. Google Trends works best as a companion tool, not a standalone solution.
Who should use it and when to upgrade
Everyone, especially anyone in a seasonal niche or covering fast-moving topics. There is no paid version. What you will want alongside it is volume data.
5. Ahrefs Free Keyword Generator
This is the fastest way to turn one vague idea into a working keyword list, and you do not need an account. Type a seed term, pick a country, and it returns roughly a hundred ideas across report types including phrase match, also-rank-for, autocomplete, and questions, each with a volume estimate and a Keyword Difficulty score.
Best for
Beginners who want a credible starting list in under a minute.
Free plan overview
Free, no login, no daily cap, drawing on a database Ahrefs puts at over eight billion queries and covering Google, Bing, YouTube, and Amazon. Ahrefs Webmaster Tools is separately free and gives limited Site Explorer and Site Audit access for domains you verify. Paid plans start at $29 per month for Starter, then jump to $129 for Lite. There is no free trial.
- ✓ No account and no usage cap, which is rare among keyword tools of this quality.
- ✓ Keyword Difficulty comes from Ahrefs, one of the most widely trusted difficulty metrics in the SEO industry.
- ✓ The Questions report provides ready-made ideas for FAQ sections and standalone content.
- − You cannot meaningfully filter or sort results. Combining search volume and difficulty filters requires a paid plan.
- − No Traffic Potential or Parent Topic, two of Ahrefs’ most valuable keyword research metrics.
- − No SERP analysis, so the difficulty score lacks the context needed for confident decisions.
- − No export option. Your only choice is to copy and paste the results manually.
Who should use it and when to upgrade
Anyone starting from a blank page, or wanting a second opinion on difficulty. Upgrade when you need filters, because the free generator gives you a list while Keywords Explorer narrows a list to the ten terms worth writing. Our Ahrefs review covers what the paid tiers unlock, and if price is the sticking point there are cheaper Ahrefs alternatives covering similar ground.
6. Keyword Surfer
Keyword Surfer is the closest thing to a free version of what Keywords Everywhere used to be. It puts search volume directly into Google’s results at no cost, with no account.
Best for: Volume estimates without paying or signing up for anything.
Free plan overview: Free forever, no account. Estimated monthly volume in the search bar, CPC estimates, related keywords with a similarity score showing SERP overlap, and on-page data under each result including estimated traffic, word count, and exact keyword occurrences. Around seventy countries, saved collections, and CSV export. Surfer’s paid content platform is separate and not required.
The similarity score is the underrated part. It shows which related terms rank on the same pages, so you can cover several keywords with one strong article instead of three thin ones.
Who should use it and when to upgrade
Beginners and bloggers who want volume estimates for nothing, and anyone wanting a free cross-check against a paid tool’s numbers. There is no upgrade path for the extension. You outgrow it when you need difficulty scores and SERP context.
7. Bing Webmaster Tools Keyword Research
This one almost never makes these lists, which is exactly why we are including it. Bing Webmaster Tools has a Keyword Research feature reporting impression-based volume from Bing’s own data, and unlike Keyword Planner it shows numbers rather than ranges. It is free, uncapped, and most of your competitors have never opened it.
Best for
Free volume data that is not an estimate, plus long-tail discovery nobody else is looking at.
Free plan overview
Entirely free with no paid tier. Keyword volume based on Bing impressions, related keywords and long-tail expansions, Bing’s top ranking URLs per query, and CSV export. Verifying your site also unlocks a performance report much like Search Console’s, plus backlink data and a site audit.
- ✓ Actual search volume numbers rather than ranges, which is a genuine advantage for a free keyword tool.
- ✓ No search limits, making it practical for longer research sessions.
- ✓ A different query pool. Bing’s audience skews older and higher income, and its autocomplete often uncovers keyword variants Google’s tools miss.
- ✓ The Top URLs view adds free SERP context, a feature missing from most free keyword research tools.
- − It uses Bing data rather than Google data. The trends are useful, but search volumes will not match exactly.
- − The smaller search sample means very niche keywords often return limited or no useful data.
- − You need to verify a website to unlock the full toolset, and the interface feels dated compared with Google Search Console.
Who should use it and when to upgrade:
Anyone wanting a free second data source, and anyone whose audience skews older or more corporate. Nothing to upgrade. Use it alongside Google’s tools, not instead of them.
8. Semrush Free Tools
A free Semrush account is best understood as a sample of a serious platform rather than a tool you can run a content operation on. Ten lookups a day sounds workable until you realise the counter covers everything. Searching a term in Keyword Magic and clicking through to Keyword Overview spends two.
Best for
Testing whether Semrush’s data and interface justify the price before committing.
Free plan overview
Free account, no card. Around ten lookups per day across the whole platform, the Keyword Magic Tool with a limited number of suggestions per search, Keyword Overview with volume, difficulty, intent and CPC, Domain Overview for competitor snapshots, one project, position tracking for a handful of keywords, and a limited site audit crawl. Paid plans start at $139.95 per month for Pro, or roughly $117 billed annually.
- ✓ The data quality is the real thing. The free tier draws from the same database as the paid one, which runs to tens of billions of keywords.
- ✓ Search intent labels are included, which few free tools offer.
- ✓ You get a genuine feel for the platform before paying, which matters at this price point.
- − Ten lookups disappear fast. This is the binding constraint, and there is no way around it.
- − Suggestion counts are truncated, so you see only a fraction of what paid users see.
- − Keyword Gap, historical data, and full site audits are locked behind paid plans.
- − The free tier is designed as a funnel into the paid platform rather than a complete SEO toolkit.
Who should use it and when to upgrade
Anyone seriously weighing a paid platform, and light users needing a few checks a week. Upgrade when you catch yourself rationing lookups. Our Semrush review breaks down which tier suits which stage, and Ahrefs vs Semrush is where most readers go next. If $140 a month is out of reach, SE Ranking and Serpstat cover much of the same ground for less.
9. Moz Keyword Explorer (Free Account)
Moz gives away something most free tools will not: exact monthly search volume rather than a range, plus a difficulty score and an organic click-through rate estimate. The catch is the meter. A free Moz Community account includes a small monthly allowance of queries, and since each returns a large batch of suggestions it stretches further than the number suggests. But it resets monthly rather than daily, which changes how you use it.
Best for
Getting precise numbers on a shortlist you have already narrowed down elsewhere.
Free plan overview
Free Moz Community account, permanent, no card. Exact monthly volume, Keyword Difficulty, an organic CTR estimate, a Priority score blending all three, plus keyword suggestions, questions, and related topics. Limited MozBar and Link Explorer access come with the same account. Paid Moz Pro plans start around $39 per month on annual billing.
The organic CTR metric is the one worth caring about. A keyword with 5,000 searches and a low CTR because the results page is stuffed with snippets and ads is worth less than a 2,000-search term where the blue links still get clicked.
- ✓ Exact search volume for free, the clearest advantage over Keyword Planner’s volume ranges.
- ✓ Organic CTR is a genuinely differentiated metric that changes keyword prioritization.
- ✓ The Priority score saves mental arithmetic when comparing a long list of keywords.
- − The monthly allowance is small, making it better for spot checks than full research sessions.
- − A monthly reset is restrictive. Burn through your queries early, and you wait weeks for more.
- − No competitor keyword research is available on the free tier.
- − The keyword database is smaller than Ahrefs or Semrush, so obscure terms sometimes return no data.
Who should use it and when to upgrade
Researchers who work in two stages, generating ideas with an unlimited tool then validating the shortlist here. Upgrade when a handful of checks a month stops covering a single article. Our Moz Pro review covers the paid tiers, including the AI visibility features Moz has been building through 2026.
10. AnswerThePublic
AnswerThePublic visualises autocomplete data as a wheel of questions, prepositions, and comparisons. It is excellent at one job and limited at everything else. The free tier has been squeezed considerably since NP Digital acquired the tool, and three searches a day is enough to plan one article, not a content calendar.
Best for
Mapping the questions real people ask about a topic, fast.
Free plan overview:
Three searches per day, no account needed. Visual wheels covering questions, prepositions, comparisons, alphabetical variations, and related searches, plus image export and coverage of platforms beyond Google. Paid plans start at roughly $9 to $15 per month depending on billing, rising to $99 and $199 for higher tiers.
Who should use it and when to upgrade
Content writers who need question angles and can work inside a tight daily limit. Only upgrade if question research is a core, recurring part of your workflow. For most people the free tier plus Google’s own People Also Ask boxes is enough.
Also Asked maps
People Also Ask chains and shows how questions branch from one another. The free tier allows only a handful of searches, but the relationship mapping is something no other free tool does the same way.
Screaming Frog SEO Spider
This is not a keyword tool, but its free tier crawls up to 500 URLs and shows every title tag and heading on your site. That is how you find pages already targeting the keyword you were about to write about again. Our Screaming Frog SEO Spider review covers where the free crawl limit starts to bite.
Free vs Paid Keyword Research Tools
Free tools are not worse versions of paid tools. They are narrower. Understanding the shape of that gap tells you when to spend.
Data depth
Free tiers show you a slice. Paid platforms show the whole table plus filters to interrogate it. The Ahrefs free generator gives you a hundred ideas; Keywords Explorer gives you thousands filterable by difficulty, volume, CPC, SERP features, and word count at once. That filtering is the actual product.
Competitor analysis
The sharpest divide. You can glimpse a rival’s keywords through Keywords Everywhere’s free domain lists or a Semrush Domain Overview, but you cannot systematically find every keyword a competitor ranks for that you do not. Keyword gap analysis is paid everywhere, without exception.
Search limits
Ten lookups a day is not a data problem, it is a workflow problem. It changes how you think, because you start rationing curiosity.
Historical data and difficulty
Free tools show you now. Paid tools show the last few years, which is how you tell a real trend from a fluke. And while some free tools give you a difficulty score, none give you the reasoning behind it: which pages rank, how many links they have, how strong their domains are. Difficulty without SERP context is a number you take on faith.
Reporting and workflow
No free tool produces a client-ready report, which alone justifies a subscription if you do SEO for other people. Free research also means five tabs and manual cross-referencing. If your time is worth $30 an hour, a $139 subscription pays for itself in the first five hours it saves.
So when should you pay? When SEO is producing something. If your site earns nothing yet, a paid tool will not fix that, and free tools will carry you through your first twenty articles. Once traffic converts into revenue, the free workflow starts costing more in hours than a subscription costs in dollars.
How to Choose a Free Keyword Research Tool
Start with your goal
Growing an existing site means Search Console first, always. Launching something new means Keyword Planner and the Ahrefs generator, because you have no data of your own yet. Publishing on a schedule means Google Trends for timing.
Check the limit before the feature list
A tool with better data and three searches a day may serve you worse than a weaker tool with no cap. Daily caps suit steady drips of research, monthly allowances suit batch sessions.
Decide how much accuracy you need
Ranges are fine for choosing between broad topics. Choosing between two specific articles needs exact figures, which points to Moz or Bing Webmaster Tools.
Weigh ease of use honestly
The best tool is the one you will actually open, and browser extensions win here more often than dashboards because they meet you where you already work.
Look for an upgrade path you would take
Some free tiers lead somewhere sensible. A $29 entry tier is a friendlier ladder than one jumping straight to three figures.
Do not use just one
This is the real answer. Every free tool has a hole in it, and the holes do not overlap. Two or three used together get remarkably close to what one paid platform does.
A Free Workflow That Actually Works
Here is how we would combine these tools with no budget at all.
- Start with Google Trends. Confirm the topic is stable or growing, and note when it peaks.
- Generate ideas with the Ahrefs free generator. Take the phrase match and questions reports. You now have a hundred candidates.
- Sanity-check demand in Keyword Planner. Ranges are enough here, and bid estimates flag commercial intent.
- Get exact numbers on your shortlist from Bing Webmaster Tools or Moz. Fifteen keywords maximum, since this is where limits get spent.
- Check what already ranks with Keyword Surfer. Word counts and traffic estimates tell you what it takes to compete.
- Fill in questions with AnswerThePublic or People Also Ask. These become your subheadings.
- After publishing, live in Search Console. Filter for positions eight to twenty and improve pages already close. This step compounds, and most people skip it.
That is a complete research process using nothing but free tools. It takes longer than doing it inside one paid platform. It does not produce worse decisions.
Final Recommendations
Best overall free tool: Google Search Console
Nothing else gives you real, unlimited data on your own search performance. Its one weakness is needing existing traffic to be useful.
Best browser extension: Keywords Everywhere
The free feature set is broader than its reputation suggests, and having difficulty scores and related keywords appear as you browse changes how much research you actually do. Keyword Surfer is the alternative if free volume matters more to you than difficulty scores.
Best for beginners: Ahrefs Free Keyword Generator
No account, no limits, credible difficulty data, and a hundred ideas from one seed term.
Best for bloggers: Google Trends plus Keyword Surfer
Trends tells you when to publish, Surfer tells you how much content it takes to compete. Both free, neither capped.
Best for small businesses: Google Keyword Planner
The geographic filters and bid estimates suit local and commercial intent better than anything else free, and unlimited searches mean you can research a whole service list in one sitting.
Best Google-based too
Google Search Console, with Keyword Planner and Trends close behind. Together they cover demand, timing, and performance, all from the source.
Most underrated: Bing Webmaster Tools.
Exact volume figures, no limits, and long-tail terms your competitors are not looking at, because almost nobody bothers to log in.
Best upgrade path: Ahrefs
The $29 Starter tier is the gentlest step up from free of any major platform. Semrush’s free account is the better sample of a full platform, but the jump to $139.95 per month is steep. Either way, upgrade when your research starts costing you hours, not before.
The honest summary: no single free tool is enough, and no reader needs all ten. Pick the one that matches where your site is now, add a second to cover its blind spot, and put the subscription money into publishing instead. You can always buy better data later. You cannot buy back the months you spent researching instead of writing.
Frequently Asked Questions
What is the best free keyword research tool?
For an existing site, Google Search Console, because it shows real data rather than estimates. For a new site with no traffic, the Ahrefs Free Keyword Generator paired with Google Keyword Planner. There is no single winner because these tools answer different questions.
Is Google Keyword Planner enough for SEO?
Not on its own. The data is primary source and the search limits are generous, but volume comes as wide ranges without ad spend, the ideas skew commercial, and there is no organic difficulty data. Use it as a cross-check alongside a tool that reports exact figures.
Is Keywords Everywhere free?
Partly. The extension is free to install and includes eighteen features that use no credits, covering keyword ideas, difficulty scores, domain traffic estimates, Moz link metrics, and AI prompt templates. Search volume, CPC, competition, and trend charts need paid credits starting at $84 per year.
Which free keyword research tool is most accurate?
Google Search Console, because it is your own measured data rather than a model. For keywords you do not rank for yet, Keyword Planner is closest to the source but its ranges limit precision. Bing Webmaster Tools gives exact numbers from Bing’s smaller query pool. Everything else estimates, which is why the numbers disagree between tools.
Can I rank using only free SEO tools?
Yes, and plenty of sites do. Free tools cover keyword discovery, demand validation, and performance tracking well enough to build real traffic. What they do not cover is systematic competitor analysis and efficient reporting, which is what starts to matter once you are competing with sites that treat SEO as a job.
What is the difference between free and paid keyword research tools?
Depth, limits, and workflow. Free tools give you slices of data with caps on how much you can pull. Paid tools give you the full dataset, filters to interrogate it, competitor keyword profiles, historical data, SERP context, and everything in one place. You are largely paying for time saved and competitive visibility.
About the Author
Mademoiselle Jove, Senior Editor, ZoneVerified
Mademoiselle Jove is the Senior Editor at ZoneVerified. With over eight years of professional experience in SEO, technical SEO, content strategy, and digital marketing, she specializes in evaluating software through the lens of real business workflows. Her experience includes building SEO systems, managing large-scale content operations, conducting technical audits, and working with a wide range of productivity, analytics, marketing, and project management tools. She oversees ZoneVerified’s editorial standards to ensure every review is accurate, transparent, and genuinely useful.
Editorial Independence: ZoneVerified publishes independent reviews based on research, editorial analysis, and genuine hands-on experience where applicable. Our recommendations are never influenced by compensation or commercial relationships.