Backstage PREP
List the show
before it starts.
Stop loading items into Whatnot one-by-one. Prep is a Chrome sidepanel that lets you draft a full batch of listings — titles, photos, categories, prices — in one place, then push them to Whatnot in a single CSV import.
In private beta — invite-only · bundled with Lite · Chrome extension · works alongside Whatnot Seller Hub
List the show
before it starts.
Join the waitlist Built by a working Whatnot seller — I read every signup personally and reply within 24 hours. — Jackie, Backstage Live
2 batches in motion. None ready yet.
Your between-shows workshop. Each batch is a CSV in the making.
Ready to share?
Pre-show today
You're filling out Whatnot's listing form. One. Item. At. A. Time.
One item, one form, repeat 22 times
Whatnot's form takes one listing at a time — title, category, condition, shipping, price, photos, save, repeat. By item 22 it's two hours later and your wrist hurts.
Photo soup
You shot 30 photos on your phone, AirDropped them over, and now you're squinting at
IMG_4521.HEIC trying to remember which item it was.
Category tree from hell
31 categories, each with its own sub-categories, condition tiers, and shipping profiles. The right combo is buried four clicks deep — and you re-find it every single listing.
Pre-show panic
It's 5pm. The show's at 7. You're 9 items in with 13 to go — and you haven't eaten dinner.
Prep lets you draft the whole batch in one sidepanel, then push it to Whatnot in a single CSV.
What Prep actually does.
A focused listing builder in your Chrome sidepanel that exports a CSV Whatnot's bulk importer accepts directly.
Drag a folder of photos in
Drag 30 photos from Finder into the Prep pane and group them into items — photos attach automatically, files become the SKU, and you just fill in title, price, category.
Auto-numbered callouts buyers can shout
Every item gets a chat-friendly code — A1, A2, A3 — buyers shout to request it. Sort your batch, hit Renumber, and every callout snaps back to sequential order.
All 31 Whatnot categories baked in
Pick a category and the right sub-categories, condition tiers, and shipping profiles populate automatically. No more memorizing Whatnot's tree.
Bulk-edit a selection in one shot
Select 12 items and set category, condition, and shipping in one modal — or save a preset once and apply it to every relevant item.
CSV export that Whatnot accepts as-is
One click. The export matches Whatnot's bulk-import template exactly — open Seller Hub, drag the CSV in, and listings appear as drafts, ready for your show.
Prep is in private beta.
I review every signup personally and reach out within 24 hours to send your download link and walk through setup. Drop your email and Whatnot handle below.