Exact white
All three color channels equal 255 and the pixel is opaque. The report displays this strict value separately from near white.
Free browser-local utility
Pure-white product-image background checker
Measure how many outer-background pixels are exact white, near white, colored, or transparent. The report is generated on your device, so you can preflight a marketplace main image without uploading the file to Fotoly.
Exact #FFFFFF scoreNear-white scoreTransparency checkAverage edge RGB
Private by design
Your browser opens the selected file and draws a reduced copy into a temporary canvas. JavaScript then reads only that canvas to calculate the report. This page does not call an upload endpoint, an AI model, or a third-party image-analysis service.
Normal page analytics may record that this URL was visited. This tool does not submit the file name, image contents, sampled pixels, or result metrics.
Free local pixel check
Inspect the image border
Pixels stay in this browser
The tool samples a band around all four edges. It intentionally avoids most center pixels, where the product is expected to appear.
Choose one product image
Up to 50 MB · first frame used for animated files
What this check cannot see
It does not detect logos, text, props, restricted content, blur, product fill percentage, or category rules. If the product touches the sampled edge, those pixels will lower the white score.
Your local pixel report will appear here
The browser draws a reduced copy to a temporary canvas, selects the outer pixels, and compares them with exact white RGB 255, 255, 255.
Not an official Amazon, Walmart, eBay, Shopify, or marketplace certification. This tool is a local color preflight. Always confirm current category and seller-portal requirements before publishing.
Understand the score
White-looking is not always pure white
A monitor can make RGB 250, 250, 250 look nearly identical to RGB 255, 255, 255. Marketplace software reads the stored pixel values, not your visual impression. That is why this report separates exact #FFFFFF from near-white pixels.
Transparency is another common trap. A transparent PNG may appear white on a white browser page, but it can display against another color after processing. When the destination calls for a white background, flatten the export onto an opaque white layer and verify the final file—not only the design canvas.
Near white
Every RGB channel is at least 250. It can look clean to a person while still containing compression, shadow, or a warm/cool tint.
Transparency
The alpha channel is below the checker’s opaque threshold. Transparency is reported separately and never counted as white.
Average edge RGB
A quick signal for color cast. An average can hide individual dark pixels, so use it alongside the exact and near-white percentages.
Recommended workflow
How to fix an off-white result
Work from the highest-quality source you have. Repeatedly editing and saving the same JPEG can introduce new artifacts, even when the design originally used an exact-white layer.
- 1
Inspect the final export
Run the actual JPG, PNG, WebP, or AVIF you plan to upload—not only a screenshot from the editor.
- 2
Check transparency first
If the image is transparent, add an opaque #FFFFFF layer underneath the product and flatten the export.
- 3
Remove edge tint and shadows
Clean warm-gray, cool-gray, colored spill, or shadow pixels that reach the sampled border. Preserve intentional contact shadows only where the marketplace permits them.
- 4
Export once from a clean master
Use sRGB and a sensible quality setting. Avoid a chain of low-quality JPEG saves that can contaminate clean white areas.
- 5
Repeat both technical checks
Re-run this pixel checker and the size-and-ratio checker, then inspect the marketplace preview on desktop and mobile.
Finish the marketplace review
A white edge is only one requirement
Image size & ratio checker
Read dimensions, aspect ratio, file weight, and marketplace planning benchmarks locally.
Read moreAmazon image requirements
Review main-image background, resolution, framing, secondary-image, and export guidance.
Read moreWalmart image requirements
Plan a consistent square image set and understand how the main image differs from secondary slots.
Read moreWhite background vs lifestyle
Choose the right image type for the catalog anchor, product page, and persuasive secondary frames.
Read moreFrequently asked questions
White background checker FAQ
What does “pure white” mean in a digital product image?
In an ordinary sRGB image, exact digital white is RGB 255, 255, 255, also written as hexadecimal #FFFFFF. A transparent pixel can look white against a white webpage but is not the same as an opaque white pixel in the exported image.
Why does the tool inspect the border instead of the entire image?
The center of a product image normally contains the product, so counting every non-white center pixel would make the score meaningless. The tool samples an outer band where a clean background is most likely to be visible. You can make the band narrower or wider based on the composition.
Can JPEG compression turn white pixels off-white?
Yes. Heavy JPEG compression can introduce small color changes around edges, shadows, and high-contrast details. If a clean master is white but the exported JPEG scores lower, export again at a higher quality or use a workflow that protects the background color.
Does a strong result guarantee Amazon or Walmart approval?
No. This tool only reports selected edge-pixel colors and transparency. It cannot certify product fill, crop, text, logos, props, shadows, prohibited content, category rules, or any marketplace decision. Always verify the current seller-portal requirements.