Image Spec Check

Website and marketplace image size checker

Image Size Checker for Websites, Product Listings, and Marketplaces

Check product image size, dimensions, aspect ratio, format, and file size before upload. Use Image Spec Check for ecommerce websites and marketplace image requirements across Amazon, Etsy, Shopify, eBay, Walmart, TikTok Shop, and YouTube.

Check an image nowMarketplace checkersWebsite image size checker
Platform target1200 x 1200 px flexible target
Recommended formatWEBP
File limit10MB
Supported formatsJPEG, PNG, WebP, GIF, SVG

Compliance

Compliance results

Upload an image to see dimension, aspect ratio, format, and file size checks.

  • Image dimensionsWaiting for uploadUse enough pixels for the page area, product zoom, social cards, or thumbnail frame where the image will appear.
    Registry value: 1200 x 1200 px flexible target
    Waiting for an uploaded image.    Recommendation source
  • Aspect ratioWaiting for uploadMatch the expected frame when the image will appear in cards, galleries, product grids, or thumbnails.
    Registry value: Match the rendered frame
    Waiting for an uploaded image.    Recommendation source
  • FormatWaiting for uploadJPEG, PNG, WebP, GIF, or SVG depending on the image type and upload target.
    Registry value: JPEG, PNG, WebP, GIF, SVG
    Waiting for an uploaded image.    Recommendation source
  • File sizeWaiting for uploadKeep website images as light as practical for the use case; this checker flags files above 10MB.
    Registry value: 10MB
    Waiting for an uploaded image.    Recommendation source

Preview

Website product and thumbnail preview

Export

Crop, compress, and export

Good quality range for product images.
Spec sources

Marketplace requirements

Clear image guidelines for every selling channel

Choose a marketplace to catch undersized images, wrong ratios, oversized files, unexpected thumbnail crops, and other product-photo issues before they delay a listing.

Website image size checkerEtsy listing photo size guideEtsy listing photo size checkereBay image size limit guideeBay photo size checkerAmazon PDP image size guideAmazon main image checker

YouTube Thumbnail

Check whether a custom thumbnail meets YouTube's recommended dimensions, 16:9 aspect ratio, accepted formats, and device-specific file size limits.

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Etsy Listing Photo

Check Etsy listing photo pixels, supported formats, square thumbnail fit, and crop risk before publishing.

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Amazon Main Image

Check Amazon main image size, square framing, accepted formats, and manual review items such as white background and product-only content.

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Shopify Product Image

Check Shopify product image upload limits, recommended 2048 px square sizing, file size, megapixels, and supported formats.

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eBay Image

Check eBay listing photos against the 500 px minimum, 1600 px recommendation, 12MB upload limit, and accepted formats.

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Walmart Product Image

Check Walmart Marketplace product images for 1:1 ratio, 2200 px target, 1000 px zoom minimum, 5MB limit, and supported formats.

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TikTok Shop Image

Check TikTok Shop product images for the 600 px minimum, square upload expectation, practical JPG/PNG export, and white-background policy items.

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Before marketplace upload

What Image Spec Check validates

Product images often fail because a marketplace rule is missed before upload. Image Spec Check works as a product image compliance checker and website image size checker, giving sellers a quick way to inspect image requirements before committing a file to a listing workflow.

Dimensions and aspect ratio

Check whether an image is large enough for marketplace display, zoom, thumbnails, and listing previews. The tool compares the current pixel size against the target frame and flags aspect ratios that may lead to unwanted cropping.

Format and file size

Marketplaces do not all accept the same file types or file size limits. Use the checklist to confirm whether a product photo should be exported as JPEG, PNG, WebP, GIF, TIFF, BMP, HEIC, or another supported format for the selected channel.

Preview and crop risk

A product photo can technically upload and still look poor in search results, storefront grids, or mobile previews. Platform-specific previews help spot framing issues, square crop problems, and images that leave too much whitespace around the product.

Why ecommerce images fail review

Common issues include images that are too small, unsupported formats, files that are over the upload limit, transparent backgrounds where they are not expected, and marketplace-specific rules around white backgrounds, watermarks, borders, text, or product fill. The checklist separates measurable issues from policy items that still need a visual review.

Private browser-first checking

The checker is designed for quick preflight review. Upload an image, inspect its dimensions, ratio, format, and size, then crop, resize, compress, and export a new file. Original uploads are used only for the current session and are not saved or published.

Read how sources, freshness dates, and rule labels are maintained in the image requirement methodology.

Use it before editing listings

Run a check before adding photos to a product listing, storefront update, marketplace campaign, or creator shop upload. Seeing the measured pixel size and ratio first makes it easier to decide whether an image should be cropped, padded, resized, or exported in a different format.

Fix the measurable issues

When a check fails, focus on the items that can be corrected immediately: image width, image height, target aspect ratio, file format, and compressed file size. The preview helps confirm whether the corrected image still keeps the product visible inside the marketplace frame.

Export a cleaner upload file

After review, export a new file for the selected platform instead of overwriting the original. This keeps the source image available for future marketplace versions while giving the current upload a more predictable size, crop, and file weight.