Seller Tools
Small standalone utilities for running an eBay store — no eBay lookup or account connection required.
SKU Generator
Enter a base SKU and, optionally, up to two variation types (e.g. Size, Color) with their values — generates one SKU per combination.
Generated SKUs
A SKU generated here is just text — this tool doesn't check it against your existing inventory or eBay listings for duplicates, and values are uppercased with spaces/punctuation stripped to keep SKUs URL/file-name safe. Values containing only numbers or symbols after stripping are skipped.
Listing error reference
What a Trading API error code/message means and what to change to clear it, for the most common listing errors — search by code or keyword.
| Code | Message | What to do |
|---|
A curated set of the most common listing-creation errors, not eBay's full API error catalog (which runs to thousands of codes across every Trading API call, most from auction-era listing types no longer in everyday use). Error codes and official message text are read directly from eBay's own Trading API error reference (developer.ebay.com), verified 2026-09; the "what to do" guidance is written fresh, not copied from any third party. If a listing error you're seeing isn't here, eBay's own full error reference covers every code.
Buyer message templates
Copy-paste templates for common buyer messages — fill in the
{{placeholder}} tokens yourself before sending. This app has no eBay account connection, so
nothing here is auto-filled or sent automatically.
Original wording written for this app, covering the same everyday seller-buyer moments 3Dsellers' own template library does (order confirmation, shipping, delays, feedback requests, returns/refunds) — not a copy of their text. These are a starting point, not eBay-mandated wording; edit freely before sending.