Marketplace listing tool
eBay gives you 80 characters per title. Most sellers spend about half, then fill the rest with words buyers never type. Paste your titles below — everything runs in your browser, and nothing is uploaded anywhere.
Showing an audit of 20 example titles. Replace them with your own and run it again.
| Rule | Titles | Why it costs you sales |
|---|
Suggested titles only rearrange or expand wording already in your title. This tool never invents a fact about an item — it will not guess a binding format or a condition grade. Where something is missing that only you can know, it says so instead.
Recursion Budget — if you are building anything that expands a topic into sub-topics and expands those, the call count is a geometric series. Depth 6 at branching 5 is 3,906 model calls, not a few hundred. Works out the worst case and what it costs before you press run.
What you actually keep — compare what a sale nets you on eBay, Etsy, Poshmark, Mercari, Depop, Whatnot and Facebook side by side, using the fee basis each one really charges on. Most comparisons apply eBay's rule to Poshmark, which overstates Poshmark's fee by 22% on a $10 item.
This page tells you what is wrong with your titles. It cannot tell you what you actually made. If you want that, there is a paid spreadsheet - Reseller Profit & Inventory Tracker - that works out cost, fees, net profit, margin and ROI per item across eight marketplaces. There is also a Bin Label Maker that prints scannable barcodes for your bins, and a Lot Break-Even Calculator for deciding what a pallet or box lot is worth before you bid, and Billable Weight for working out how much of your postage is paying for air rather than weight, and Return Cost for what a return actually costs once eBay keeps the per-order fee and you have paid for shipping twice. All entirely optional; this auditor stays free.
You can see all of them before deciding: product demos — browsable static snapshots of the two Flask applications, and full-page screenshots of every browser tool. Each page states plainly which parts are not live.
This page knows the book shorthand buyers never search for —
Vtg, HB, Hb/dj — but it does not touch
the number on the back. There is a second free page for that:
ISBN checker and hyphenator.
Paste a column of ISBNs and it validates each one, converts between ISBN-10 and
ISBN-13, and hyphenates them the way the International ISBN Agency says they should
be — which needs the agency's published publisher ranges, not a rule of thumb.
Same deal as this page: free, in your browser, nothing uploaded.