How do I compress images for Amazon?
Compress Amazon images by resizing to the marketplace’s recommended pixel size first, then reducing file weight with a compressor that keeps edges on the main white-background photo sharp. Aim for a file that uploads without errors and still looks crisp on zoom. CrossKit’s Image Resizer and Image Compressor run in the browser so you can prepare photos before Seller Central.
Compression is not the same as shrinking a 200-pixel thumbnail. Start from a high-resolution original, then compress.
Steps
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Keep a lossless original
Never overwrite the camera file. Compress exports only.
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Resize to a sensible longest side
Amazon generally wants large enough images for zoom. If the file is huge because of 6000px width, downscale before compressing quality.
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Use JPEG for most photos, PNG for graphics
Photos with a white background usually JPEG well. Text-heavy infographics often need PNG or careful JPEG quality.
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Compress until upload is reliable
If Seller Central rejects or stalls, lower file size further. If zoom looks muddy, you went too far.
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Name files clearly per SKU
Main, lifestyle, infographic. Saves the wrong-image listing error.
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Spot-check zoom on a phone after upload
Desktop previews hide softness. If jewelry edges or logo type look muddy, export again at a higher JPEG quality from the original.
Resize first, then compress
Amazon wants images large enough for zoom, not 8,000px camera files. Downscale the longest side to a sensible marketplace size, then compress JPEG quality until upload is reliable and zoom is still sharp. Keep a lossless original; never overwrite the camera file. Photos with a white main background usually JPEG well. Text-heavy infographics often need PNG. CrossKit Image Resizer then Image Compressor is the browser order that avoids muddy main images.
How small is small enough
There is no single kilobyte target. If Seller Central rejects or stalls, go smaller. If zoom looks muddy or white backgrounds show banding, you went too far. Main images can stay heavier than lifestyle shots. Name files by SKU and role (main, lifestyle, infographic) so you do not upload the wrong slot. Batch similar lighting together; do not screenshot an already-compressed JPEG and upload that.
How CrossKit fits this job
CrossKit Image Compressor is the free browser step after Image Resizer. Keep masters, export JPEG for packshots and PNG for type-heavy graphics, then upload. If Seller Central still rejects the file, lower weight again from the original—not from the last export—so artifacts do not stack.
Example
A 12 MB phone photo at 4032×3024. Resize longest side to around 2000–2500 px, export JPEG at a visually lossless quality, often landing between a few hundred KB and ~1–2 MB depending on detail. The main image stays white and sharp; lifestyle shots can be slightly smaller.
Common mistakes
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Screenshotting a compressed JPEG and uploading again
You stack artifacts. Always go back to the original.
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Crushing PNG logos into tiny JPEGs
Halos appear on white. Keep graphics as PNG when needed.
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Compressing the only copy you have
If the result is too soft, you need the original. Archive masters outside the export folder.
Recommended tool
Image Compressor
CrossKit Image Compressor reduces product image file sizes for ecommerce. Use Image Resizer first when the pixel dimensions are far above marketplace needs.
Frequently Asked Questions
Will compression get my listing rejected?
Over-compression that looks blurry can hurt conversion; file type/size issues can block upload. Balance both.
Can I compress in bulk?
Yes. Prepare a folder of exports and run them through the compressor before upload.
Will Amazon compress my images again?
Marketplaces often transcode uploads. Starting from a reasonably sized, sharp file still reduces failed uploads and keeps more detail than a 20 MB original that times out.
JPEG or PNG for the main image?
JPEG is typical for photographic packshots. PNG is better for sharp graphics. Follow the current Amazon image help page for color space and minimum pixels.