Free KDP Keyword Research Tools: Where the Data Runs Out

What "Free" Actually Covers for KDP Keyword Research

Search for kdp keyword research free tools and three names keep turning up: Amazon's own search bar, Google Trends, and the U.S. Patent and Trademark Office's public database. All three are genuinely free, not free-trial, not freemium. No card, no account, no query limit that matters to a solo seller.

Amazon's search bar autocomplete costs nothing and needs no login. Type a seed phrase into amazon.com's search box while logged out, so your own purchase history doesn't skew the suggestions, and Amazon returns the completions buyers are typing right now, ranked by how often people actually search them.

Google Trends is the second stop for most sellers doing amazon kdp keyword research free of any subscription. It shows relative interest in a term over time, going back to 2004, filterable by country and, for some queries, by category. There's no limit on how many terms you check in a day.

The USPTO's own search system sits at tmsearch.uspto.gov, the current interface that replaced the older TESS tool a few years back. It's a free, unlimited, full-text search of the federal trademark register, and it's the closest thing to an authoritative answer on whether a phrase is already claimed.

Between those three, a solo seller can put together a working kdp keyword research tool free of any monthly bill. The gap isn't that these tools are weak. Each one answers a narrower question than sellers assume, and the part it doesn't answer is usually the part that decides whether a niche is worth the week it takes to build a book. For a wider look at the keyword-tool landscape across print-on-demand platforms generally, not just Amazon, see the broader keyword-tool comparison.

The Three Places Free Data Runs Out

Line up what each free source actually measures and a pattern holds across all three: strong on breadth, thin on depth. Here's where each one stops.

The trademark row is worth sitting with longer than the other two. A phrase can pass a clean TMsearch check and still draw a takedown notice, because a good share of active enforcement in print-on-demand comes from brands that never bothered to federally register a phrase. They just used it consistently and defended it when someone else did too. Free covers the federal register. It doesn't cover the rest of the internet.

Trend History: What Amazon's Search Bar Can't Show You

Amazon's autocomplete is a snapshot, not a chart. It tells you what's being typed this hour, with no memory of what was being typed six months ago. That's fine for a phrase with flat, evergreen demand. It's a trap for anything seasonal, which describes a large share of the low-content book category.

Google Trends fixes the "when" problem and introduces a different one: it measures search interest across the whole web, not purchase intent on Amazon specifically. A spike in a phrase's search interest could be driven by a viral post, a news story, or people looking up unrelated information, none of which puts a book in a cart.

Two free adjustments narrow that gap. Add a buying-intent word to the Trends query, such as "planner," "gift," or "journal," instead of the bare niche term, which filters out a chunk of the purely informational searches. Pull the five-year view before judging a niche dead, too. A wall-calendar phrase that looks flat in June and spikes every October for five years straight isn't dead. You just checked it at the wrong month.

Neither trick produces an actual unit number. Amazon does not publish KDP category search volume anywhere, free or paid, the way an SEO tool publishes Google search volume for a website keyword — every keyword tool on the market, free or paid, is estimating from proxy signals. The honest difference between free and paid research at this step is how good the estimate is and how many phrases it covers at once, not whether one side has real numbers and the other is guessing.

Competition Depth: Counting Listings Isn't Competition Analysis

Counting how many results Amazon returns for a phrase tells you almost nothing. That number usually sits in the thousands regardless of how competitive the niche actually is, because Amazon's search engine matches loosely on individual words, not the exact phrase you typed.

A more useful free check reads the first page like a person, not a counter. How many of the top twenty titles contain the exact phrase versus a loose match? How many carry a Best Seller or Amazon's Choice badge? How many reviews does the top result have, and how recently was it published, a date you can check on the product page itself? A page where six of the top ten results went live in the last three months and already carry hundreds of reviews is a different opportunity than one where the top result is four years old with a dozen reviews total.

This works, and it costs nothing. It also takes ten to fifteen minutes of focused reading per phrase, and it doesn't scale. Reading three niches this way on a Saturday afternoon is reasonable; reading thirty before a seasonal push is not. The real shape of the free-versus-paid line for competition research isn't that free tools can't see competition — it's that free tools require you personally to be the one reading every result, one page at a time.

Trademark Risk: The One Gap With an Actual Free Fix

None of this is legal advice. A clean TMsearch result is a screening step, not a legal opinion, and a phrase's status can change between the day you check it and the day you publish. Last checked September 2026.

TMsearch is the one gap on this list with a genuinely complete free fix. It covers the full federal trademark register, costs nothing, carries no query limit, and shows live status for any phrase: registered, pending, abandoned, or opposed.

What it doesn't cover is where most of the risk actually lives. Common-law trademark use, a brand that has used a phrase for years without ever federally registering it, is still enforceable and invisible to a register search. Foreign-registered marks won't show up either, which matters if you sell into other Amazon marketplaces. And reading the result correctly trips up more sellers than the search itself: a mark abandoned for non-use is a different situation than one that's live but registered in an unrelated product class, and treating every hit as an automatic no, or every miss as an automatic green light, is how sellers either walk away from safe phrases or walk straight into unsafe ones.

Running that same TMsearch lookup by hand for every finalist title is what Octozia's Trademark Checker automates: paste in the phrase, get the same USPTO data back in seconds instead of reading raw register entries yourself, inside a 3-day trial that requires a card up front and can be cancelled before it charges anything. It speeds up the search step. The judgment call on a borderline result stays with you. See the trademark checker walkthrough for what a borderline result actually looks like, and the phrase-by-phrase review process for the fully manual version of the same check.

A Worked Example: Testing One Phrase by Hand

Here's the full loop run against one realistic example: a planner niche built around the phrase "dog mom planner." None of the entries below are search-volume estimates. They're what each free tool actually returns when the phrase is tested this way, and where the answer stops short.

Four free lookups, maybe twenty minutes total, and by the end there's a real answer to three separate questions: is anyone searching for this, is interest rising or seasonal, and is the phrase clear to use. What still isn't there after all four steps is a unit number. No free source says "1,200 searches a month" for a KDP phrase, because Amazon doesn't publish that figure to anyone, free or paid.

A Repeatable Free Workflow, Step by Step

When Paying for a Keyword Tool Actually Changes the Decision

None of the above means paid tools are pointless. It means they solve a specific problem, and it's worth being precise about which one before spending anything.

Paid keyword and research tools built specifically for KDP and print-on-demand sellers charge for exactly the two things free tools push onto the seller: estimated volume and automated competition scoring across many phrases at once. Book Bolt is the one most sellers compare a free workflow against, and its own pricing page, as of September 2026, lists Pro at $19.99 a month billed annually (around $24 a month billed monthly) and Premium at $29.99 a month billed annually (around $36 a month billed monthly). Check bookbolt.io/pricing for the current figures before committing, since publishing-tool pricing shifts; for more on how a free workflow compares to that specific tool, see the Book Bolt free-alternative breakdown.

Octozia doesn't compete on that particular ground, and it's worth saying plainly rather than dancing around it: there's no built-in KDP search-volume or competition-scoring tool in the product line right now. KDP Creator generates puzzle-book interior page images, and the Trademark Checker screens phrases against the USPTO register, but neither replaces a dedicated volume tool. If you're publishing across more than a couple of niches a month, that's a genuine reason to add a paid research tool to the free workflow above, not to skip the free workflow entirely.

FAQ