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1200×1200 JPEG · square
Marketplace listings rank partly on image quality: pixel-sharp, correctly-sized photos surface above cropped or low-resolution competitors. Poshmark Listing Image matches the platform's published image requirement so listings render without the platform's own downscaler kicking in. The preset produces 1200×1200 JPEG, which is what the marketplace uses for the primary product image.
| Output dimensions | 1200×1200 pixels |
|---|---|
| Aspect ratio | 1:1 (square) |
| Output format | JPEG @ 92% quality |
| Processing | 100% in your browser — no upload |
| Cost | Free, unlimited |
| Source | Official guidelines |
This preset is a deterministic recipe — every step has fixed parameters so the result is byte-identical across runs of the same input.
Poshmark Listing Image crops your input to 1:1 and resizes it to 1200×1200 px as JPEG — a 1.4-megapixel output. The work runs through canvas APIs and a WebAssembly image-encoder; the source image is decoded into an off-screen canvas, transformed in place, and re-encoded without any network upload.
Marketplace listing tools sometimes silently downsample images that exceed their internal limit; this preset's exact-size output sidesteps that path. The browser-side path also means the file never leaves your device — relevant when the input contains personally identifiable information, screenshots of private documents, ID scans, or proprietary product photography.
1200×1200 px, saved as JPEG at quality 92%.
The marketplace this preset targets uses 1:1 framing. For passport photos this matches the printed-photo standard; for social posts it's the safe ratio that fills the feed without horizontal cropping.
The target accepts JPEG, and JPEG compresses photographic content 5-10× smaller than PNG with no visible difference at quality 92%. PNG is the right choice only when the image has hard edges or transparency — which photo-ID, social posts, and product photos don't.
No. This preset runs entirely in your browser using WebAssembly + canvas APIs — no server round-trip. You can verify this in your browser's network panel: only static asset requests, no image upload. The file never leaves your device.