Staged noindex
Official-source image dimensions and upload guidance mapped to local image cat tools. Each row carries a source URL, reviewed date, effective-date status, and a conservative verified flag.
Platform image specs are compiled from official sources and source-checked by image cat. Platform rules can change, account types can differ, and acceptance is never guaranteed. If an official page does not state an effective date, effectiveDate is set to unknown and verified remains false.
Amazon / Product main image
Use a pure white RGB 255,255,255 background for the main product image, avoid text or watermarks, and keep the product large in frame.
Discord / Profile avatar
Start from a centered square image, then use a circular avatar crop so corners do not carry important detail.
Etsy / Listing photo
Use sharp listing photos with enough resolution for buyers to zoom, then crop consistently for search and shop grids.
Facebook / Feed image ad or link image
Use a 1.91:1 image for link-style placements and keep text readable at mobile preview sizes.
Instagram / Portrait feed post
Use a 4:5 portrait crop for feed posts when you want more vertical space while keeping the subject centered.
Instagram / Story or Reels cover
Use a full-height 9:16 creative and keep key text away from top and bottom interface controls.
LinkedIn / Sponsored content image
Use a wide 1.91:1 image for professional feed placements and avoid tiny text that collapses on mobile.
Pinterest / Standard Pin
Use a 2:3 vertical image so the Pin has enough feed presence without being cropped for being too tall.
Shopify / Product image
Use consistent square product images where the theme permits, and optimize weight before uploading to keep storefront pages fast.
TikTok / Video cover image
Use a vertical 9:16 cover-safe crop and keep text within the center area so interface overlays do not hide it.
X / Post image
Use a 16:9 image with the important subject centered for timeline previews and video-adjacent placements.
YouTube / Video thumbnail
Create a 16:9 thumbnail at 1280x720; verify any current upload-size cap in YouTube Help before compression claims.