Free Amazon tools for sellers
Seven tools that run entirely in your browser. No account, no email, nothing uploaded. The same calculations we run on client accounts.
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PettopOlyvo LabsAmazon Profit & Break-even ACoS Calculator
Work out your real margin after Amazon fees and VAT, and the exact ACoS at which advertising starts costing you money.
Open tool → Free 02 / 07Amazon PPC Audit Tool
Paste your search term report and see wasted spend, terms to negate and terms that have earned an exact-match campaign.
Open tool → Free 03 / 07Amazon Listing Checker
Check a listing against Amazon field limits, restricted phrases, keyword duplication and the spelling variants that cost you rank in your marketplace.
Open tool → Free 04 / 07Amazon Sales Estimator
Turn a Best Sellers Rank into an honest range of monthly units — with the uncertainty shown rather than hidden.
Open tool → Free 05 / 07Amazon Keyword Mapper
Paste a keyword list and get it deduplicated, grouped by intent and mapped to title, bullets and a ready-to-paste backend string.
Open tool → Free 06 / 07Amazon Review Compliance Checker
Paste a packaging insert or follow-up message and see which phrases breach Amazon's review policies before it goes to print.
Open tool → Free 07 / 07Amazon Review Rating Calculator
Work out exactly how many 5-star reviews you need to lift your listing from its current rating to the one you are aiming at.
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Why we built these
Every one of these tools is a calculation we were already doing by hand on client accounts. The profit calculator is the first thing we run before agreeing an ACoS target. The search term auditor is the first pass on any inherited advertising account. The compliance checker exists because most packaging inserts we are shown breach Amazon's policies, and the seller usually has no idea.
Publishing them costs us nothing and occasionally costs us a client — someone runs the numbers, sees the problem is their price rather than their marketing, and fixes it themselves. That is a good outcome.
What they will not do
- They do not connect to Amazon. No API, no account access, no live data. You supply the numbers; they do the arithmetic.
- They do not replace judgement. A tool can tell you a search term has spent £80 and sold nothing. Whether to negate it depends on click volume, seasonality and whether the product was in stock.
- They are not a substitute for Amazon's own policies. Particularly the compliance checker, which catches common patterns and cannot catch everything.
Want a person to look at the account?
A free written audit, back within 48 hours. Yours to keep.
Questions about the tools
Are these tools really free?
Yes. No account, no email, no trial. They run entirely in your browser, which is also why they are free — there is no server cost behind them. We built them because they are the calculations we run for clients anyway.
Do you store what I paste in?
No. Every tool runs in JavaScript on your own machine. Nothing is uploaded, logged or sent anywhere — you can disconnect from the internet after the page loads and they will still work.
How accurate are they?
The calculators are exact, because they are arithmetic on numbers you supply. The sales estimator is a model and says so plainly, showing a range rather than pretending to a single figure. The checkers are pattern rules, which catch the common problems but are not a substitute for reading Amazon's own policies.
Do I need to be a client?
No, and most people who use them never become one. If a tool tells you something you would rather have explained, the free audit is where a person reads your account properly.
Where to go next
Work with us
Want this on your own Amazon account?
Two ways to start, and both are free: book a 30-minute call with the person who would run the account, or get a written audit back within 48 hours. We will tell you plainly if we are not the right fit.