How to compress Amazon product images
Compress Amazon catalog photos after you resize them, so Seller Central accepts the file and zoom still looks sharp.
Steps
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Archive the original photo
Copy the camera or raw export to a masters folder. Compress a working copy only. If the result is too soft, you must be able to start again.
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Match pixel size before quality
Open Image Resizer and set the longest side for the Amazon slot you are filling. Do not upscale a 600 px thumbnail. Square mains and 3:4 lifestyle shots should keep a consistent catalog aspect.
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Compress JPG or PNG in the browser
Open Image Compressor, drop the resized file, and compare before/after size. Zoom a white packshot at 100%. Keep PNG when tiny type must stay crisp.
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Upload, then spot-check zoom on a phone
Desktop previews hide softness. If the listing zoom looks muddy, export again from the master at a slightly higher quality. Do not recompress the last JPEG.
Why Amazon uploads fail on file weight
Seller Central is picky about bytes as well as pixels. A 20 MB camera JPEG can stall, time out, or sit in a processing queue even when the longest side is large enough for zoom. CrossKit Image Compressor runs in the browser: the photo does not need to sit on a random host while you prepare a catalog. Keep a lossless or camera original; never overwrite the only copy.
Resize first, then compress
Pixels cost more than JPEG quality. Downscale the longest side to a marketplace size that still zooms—often around 1600–2500 px—then reduce quality until the file is reliable to upload. White-background packshots usually JPEG well. Infographics with small type often need PNG. CrossKit is not an official Amazon partner and does not replace the current image help page.
How small is small enough
There is no single kilobyte trophy. If the upload is rejected or hangs, go smaller from the original. If jewelry edges or overlay type smear on zoom, you went too far. Main images can stay heavier than lifestyle shots. Name exports by SKU and slot so a compressed lifestyle crop does not land in the main image field.
What this tool does not do
The compressor does not publish to Amazon, pull live Seller Central limits, or guarantee approval. Marketplace rules change. Check the current Amazon image requirements for minimum pixels, color space and background, then use the browser tool to meet the file-size part of that job.
Related CrossKit tool
Image Compressor
Open this browser tool after you read the article.
Frequently Asked Questions
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.
Is CrossKit an official Amazon image tool?
No. CrossKit is a general ecommerce toolkit. Image Compressor processes files in your browser. Amazon’s own help pages remain the source for live image rules.
JPEG or PNG for the main image?
JPEG is typical for photographic packshots. PNG is better for sharp graphics and small type. Follow the current Amazon image help page for color space and minimum pixels.