Pixel dimensions
The physical width and height stored in the file. Larger dimensions generally give marketplaces more room to create responsive and zoomed versions.
Free browser-local utility
Marketplace image size and aspect ratio checker
Read the exact pixel dimensions, ratio, megapixels, format, and file size of a product photo. Then compare it with practical planning profiles for Amazon, Walmart Marketplace, eBay, and Shopify—without uploading the image.
No signupNo server uploadNo AI processingInstant local result
Your file stays on your device
The selected file is opened through your browser’s local file APIs. Fotoly does not receive, store, or send the image to an AI provider. A temporary local preview disappears when you reset the tool or close the page.
Normal page analytics may measure a visit to this URL, but the image name, image contents, and test results are not submitted by this tool.
Free local tool
Check your image dimensions
No upload · no account · no AI cost
A practical preflight for square product imagery and zoom readiness.
Choose one product image
JPG, PNG, WebP, GIF, or AVIF
Profile benchmarks
- Minimum
- 1,000px longest edge for zoom readiness
- Preferred working size
- 1,600px+ working target
- Ratio guidance
- 1:1 square working target
Your results will appear here
The browser reads width, height, format, file size, megapixels, and aspect ratio directly from your selected file.
Planning aid, not platform certification. Marketplace rules can vary by category, region, listing type, and date. Confirm current requirements in the seller portal before publishing.
What the result means
Dimensions are the first gate, not the final review
Width and height can tell you whether a file is large enough for a marketplace workflow, how it may fit a product grid, and whether it gives shoppers enough detail to zoom. They cannot tell you whether the product is sharp, correctly exposed, free of trademarks, or framed according to a category-specific rule.
Treat a green result as permission to continue your review—not permission to publish without checking the listing preview. Seller-center requirements can change, and individual categories may be stricter than a general image guideline.
Aspect ratio
The relationship between width and height. A 1:1 image is square, 4:5 is portrait, and 16:9 is wide landscape.
Megapixels
Width multiplied by height, divided by one million. It measures total pixel count, not focus, lighting quality, or compression damage.
File weight
The encoded file size. A high-resolution JPEG can be lighter than a smaller PNG, so file weight and pixel dimensions should be reviewed separately.
A safer publishing workflow
Use the checker before every export batch
- 1
Check the master file
Start with the largest clean source—not a screenshot or an image copied from a live listing.
- 2
Choose the actual destination
Run the same source through each marketplace profile you intend to publish to.
- 3
Create channel-specific exports
Resize or pad from the master rather than repeatedly compressing an already exported JPEG.
- 4
Review content rules separately
Inspect background, product coverage, text, logos, props, crop safety, and category-specific restrictions.
- 5
Preview the live placement
Check desktop and mobile thumbnails after upload. A technically valid image can still crop badly in the real theme or carousel.
Continue the preflight
Check content after the file size
White background checker
Sample border pixels locally and identify off-white or transparent edges before upload.
Read moreAmazon image requirements
Review main-image, secondary-image, framing, and export guidance in more detail.
Read moreWalmart image requirements
Plan square marketplace assets, white backgrounds, and consistent secondary images.
Read moreeBay photo requirements
Understand the minimum size, listing-photo set, and practical quality workflow.
Read moreFrequently asked questions
Image checker FAQ
Does Fotoly upload the image I check?
No. This tool reads the file with browser APIs on your device. The image contents are not sent to Fotoly, an AI model, or a marketplace. Normal anonymous page-visit analytics may still record that the tool page was opened, but not the selected image.
Does a passing result guarantee marketplace approval?
No. It is a technical planning check, not an official certification. Marketplaces also evaluate category rules, image content, text, props, trademarks, product coverage, and other factors that cannot be determined from width and height alone.
Why does the checker show both a minimum and a preferred size?
A technical minimum can be enough to accept an upload while still leaving the shopper with a soft zoom or an inconsistent crop. The preferred size is a stronger working target that leaves more room for editing, responsive layouts, and marketplace compression.
Should every marketplace product image be square?
Not always. Square images are a useful workflow for consistent product grids, but some channels and secondary-image placements support portrait or landscape images. Check the actual seller portal and preview the final listing before publishing.