Seven Free Tools for Amazon Sellers, and What Each One Actually Answers
Greetings from the SOLVER team. Our work usually begins when something has already gone wrong, but a fair share of what we see could have been caught earlier by someone simply looking at the listing.
The team at UNITIX Agency publishes a set of free tools for exactly that kind of looking. We asked them to describe each one plainly, and we are passing it on, because the tools are genuinely free, they need no account, and they read only what Amazon already publishes.
That last point matters more than it sounds. None of these tools asks for Seller Central access. You paste an ASIN or a product URL and get an answer. That means they work on your own listing, on a competitor’s, and on a listing you have temporarily lost access to. They cover eight marketplaces: the United States, Canada, Mexico, the United Kingdom, Germany, France, Italy and Spain.
1. Listing Audit
unitix.pro/resources/amazon-listing-audit
Scores a listing out of 100 across four areas: content, discoverability, reputation and commercial signals. It then ranks what to fix by what each gap costs the score, so the first line is where to start rather than a list of everything that could be better. Checks that public data cannot answer are left out of the score instead of counted against you.
It also compares the listing against itself. If the description says one thing and a structured attribute says another, the audit names both values. That is worth running once across a catalogue: a listing that contradicts itself is a customer complaint waiting to happen.
2. Revenue Calculator
unitix.pro/resources/amazon-revenue-calculator
Reads the sell price, Buy Box, dimensions and size tier from Amazon, then estimates referral and FBA fees, inbound cost, net profit and margin. Useful before sourcing a product and useful again when a price change has quietly eaten the margin.
3. ASIN Inspector
unitix.pro/resources/amazon-asin-finder
Paste an ASIN or a product URL and see the listing, market and review data behind it: what the page says, what the offers look like, and how price, rating and rank have moved. When you need to establish when something changed rather than assert it, a history is the difference.
4. Keyword Analyzer
unitix.pro/resources/amazon-keyword-tool
Looks at a search term before you bid on it: how many products compete for it, which brands and categories fill the top results, and what those products cost. It answers whether a keyword is worth entering, not where you currently sit in it.
5. Keyword Tracker
unitix.pro/resources/amazon-keyword-tracker
Checks where an ASIN sits in the organic results for up to twenty keywords at once, with the movement since your last check beside each one. Parent listings are expanded automatically, so the position reported is the variation Amazon actually ranks. Any keyword it does not rank for is checked for indexation, which separates “ranking badly” from “not indexed at all”. Those two problems have different fixes.
6. Rating Tools
unitix.pro/resources/amazon-rating-calculator
Works out how many reviews it takes to reach a target star rating from where you are now, and what a merge does to the rating of the ASINs involved. The second calculation is the one people wish they had run first.
7. Title Analyzer
unitix.pro/resources/amazon-title-analyzer
Checks a title against Amazon’s 75-character Item name limit and previews how it splits into the Item name and the 125-character Item highlights. Amazon has been generating that split itself for titles over the limit since 27 July 2026, and applying it unless the seller edits the listing first. Writing the split yourself is better than accepting the one you are given.
A word of caution, from us
We will add the advice we give every client. No legitimate tool needs your Seller Central login. UNITIX prints the same warning on its own pages, which is one of the reasons we are comfortable recommending them. If any service asks for those credentials, that is where the conversation should end.
All seven tools are at unitix.pro/resources. They are free and there is no account to create.
UNITIX Agency is an Amazon growth agency we work alongside. Their tools are published free; this article describes them because our clients ask us regularly what is worth using. As always, if your account or your intellectual property is under pressure, write to us and we will look at the case.
