Drop in your product photos and get them resized, square-padded, and compressed to the exact specs Etsy, eBay, Amazon, Poshmark, Depop, Mercari, Vinted and more actually want — in seconds, in batches, for free.
Everything runs locally in your browser using your device's own processor. Your photos never touch a server — which is also why it's fast.
Drag in up to 50 listing photos at once — straight from your camera roll or folder.
Each preset applies that platform's real dimensions, aspect ratio, and file-size cap, with white square padding where it helps.
Grab files one by one or as a single .zip, already renamed in order and guaranteed under the size limit.
The numbers our presets use. Official figures come from the marketplace's own seller documentation; Working target figures are widely-used community standards where the platform doesn't publish a hard rule.
| Marketplace | Preset output | Key rules | File cap |
|---|---|---|---|
| Etsy | 2000 × 2000 px square | Official At least 2000 px on the shortest side; Etsy recommends keeping files under 1 MB for reliable uploads. Thumbnails crop landscape, so keep the product centered. | 1 MB target |
| eBay | 1600 × 1600 px square | Official Minimum 500 px on the longest side; 1600 px activates zoom. Square shows best in search. | 12 MB max |
| Amazon (main image) | 2000 × 2000 px square, pure white pad | Official Main images need a pure white background (RGB 255,255,255), 1000 px+ for zoom, product filling ~85% of the frame, no text or logos. | 10 MB max |
| Poshmark | 1200 × 1200 px square | Working target Covershots are center-cropped to a square — square uploads mean nothing gets cut off. Up to 16 photos per listing. | Light files load faster |
| Depop | 1080 × 1350 px portrait (4:5) | Working target 4:5 portrait fills the most phone screen; search thumbnails center-crop to square, so keep the item in the middle. 4 photos per listing. | Light files load faster |
| Mercari | 1080 × 1080 px square | Working target Listings display square; square uploads avoid surprise crops. | Light files load faster |
| Vinted | 1200 × 1200 px square | Working target 800 px+ displays cleanly; square shows uncropped in feed thumbnails. Up to 20 photos. | 20 MB max |
| Facebook Marketplace | 1200 × 1200 px square | Working target Feed tiles are square; square uploads keep the whole item visible. | Light files load faster |
| Shopify | 2048 × 2048 px square | Official Shopify recommends 2048 × 2048 for product images; square keeps grids tidy. | 20 MB max |
Specs last checked August 2026 against marketplace seller documentation. Platforms tweak these occasionally — if you spot a change, tell us and we'll update the preset.
Etsy quietly chokes on files over ~1 MB. We compress each photo to the platform's cap automatically and show you the before → after size.
Cross-listers prep the same photos for three or four platforms. Run the whole shoot through each preset and download a zip per marketplace.
Most "free" resizers upload your photos to their servers. Ours can't — there is no server. Processing happens on your device, and re-encoding strips GPS location and camera metadata automatically.
Give a base name and get blue-mug-01.jpg, blue-mug-02.jpg… — tidy uploads and a small SEO nudge from descriptive filenames.
No. SellerSized runs entirely in your browser using the HTML5 canvas — your photos never leave your device. You can load the page, switch off Wi-Fi, and it still works.
Etsy recommends at least 2000 pixels on the shortest side, and keeping the file under 1 MB for reliable uploads. Our Etsy preset outputs a 2000 × 2000 square compressed under 1 MB. Full Etsy photo guide →
eBay requires at least 500 px on the longest side and recommends 1600 px to enable zoom, with a 12 MB cap. Our eBay preset outputs 1600 × 1600 squares well under the cap. Full eBay photo guide →
Marketplace feeds mostly display square tiles. Padding keeps your entire product visible inside the square; cropping can slice off sleeves, handles, and hems. Use "Crop to fill" only when your photo has plenty of margin around the item.
Yes, as a side effect of re-encoding: EXIF metadata — including GPS coordinates of where the photo was taken (often your home) — is not carried into the output file.
Upscaling can't invent detail, but marketplaces enforce minimums, so we gently upscale when needed and flag any photo whose original is far below the target so you can reshoot the important ones.
Yes — it's designed for it. Open this page in your phone's browser, tap the drop zone, and pick photos straight from your camera roll.
Free, no signup, no watermarks, no limits that matter. The site is supported by ads, which cost you nothing.