Coupang main images across every seller tier

The Coupang representative-image rulebook, explained in one preset

Coupang is Korea's largest e-commerce platform and the only one of the major Korean marketplaces that splits its image contract by seller tier. Rocket Delivery (로켓배송) is the Amazon-Retail-equivalent where Coupang buys inventory from suppliers and enforces image rules at the contract-onboarding level — pure white representative image, clean shadows, no promotional callouts. Rocket Grow (로켓그로스) is the FBA-equivalent tier where Coupang fulfils but the seller keeps ownership, and this is where Coupang's one genuinely unusual rule lives: the main image must be a transparent PNG, not white. Coupang re-composites every Rocket Grow product onto its own unified grid surface for a consistent visual shelf, so a white upload is rejected and only transparent cut-outs pass. Marketplace (마켓플레이스) is the open self-fulfilled tier with the loosest rules, where white is recommended but not enforced. The base size guidance is 780×780 as the partner-consensus minimum, with 1000×1000 or higher as the recommended sweet spot, and JPG or PNG as the accepted formats. The 2 MB per-image cap, the square aspect, and the ban on text or price callouts on the main are consistent across all three tiers.

The practical consequence for Korean sellers is that Coupang drives a large share of the national demand for 누끼 따기 (nukki ttagi — cut-out making). Cross-listing a single SKU onto Gmarket and 11st and a white-background Marketplace Coupang listing is one workflow; cross-listing the same SKU onto Rocket Grow is a second, because the Rocket Grow variant needs a transparent PNG that none of the other Korean marketplaces require. This preset collapses both paths into one tool. Rocket Delivery and Marketplace mode exports a 780×780 white JPEG square-cropped to the representative image shape, with the product centred to clear the 80% frame-fill guide and shadows cleaned so the automated review does not flag a muddy background. Rocket Grow mode exports the same shot as a transparent PNG with the background fully stripped, ready for Coupang's own re-composition. Across all three modes the file stays under 2 MB, promotional callouts and price badges stay off the representative image, packaging-only shots are flagged so the product itself remains visible, and the sRGB colour space kills the warm cast that kitchen-lightbox photography introduces.

Why Coupang sellers benefit from a tier-aware preset

Coupang's WING seller portal is Korean-language first, and the Rocket Grow transparent-PNG rule sits in a partner-documented corner of the onboarding guide that international sellers routinely miss on their first upload. A tier-aware preset closes that gap at the export stage: you pick the tier the SKU is listed under, the tool picks the background, and the image lands compliant on the first attempt rather than on the third after a rejection loop. Korean sellers already running a 누끼 workflow get the same cut-out for free, inside the same session, alongside their Gmarket and 11st exports — no separate spend on a dedicated 누끼 service.