Shoppers cannot touch a product on Amazon, so zoom is the closest thing they have to picking it up. They hover over the main image on desktop or pinch on a phone to check stitching, texture, print quality and finish. When the image is too small, zoom is not offered at all. When it is large but soft, over-compressed or badly sharpened, zoom exposes every flaw.
This guide explains how resolution and zoom actually work on Amazon and how to prepare files that look sharp at every size. It deliberately stays on the technical quality of the pixels. For the full list of compliance rules on formats, backgrounds and fill, see our overview of Amazon product image requirements.
Pixels, Not DPI
The first source of confusion is DPI (dots per inch) or PPI. Many photographers and suppliers still ask "do you want 300 DPI?" For screens, DPI is just a label stored in the file. A 2000 by 2000 pixel image looks identical on Amazon whether it is tagged 72 DPI or 300 DPI. What matters is the pixel dimensions: how many pixels wide and tall the image is.
So when briefing a photographer or designer, specify pixels, for example "2400 pixels on the longest side", and ignore DPI unless the same file is also going to print. If a supplier sends you a "high resolution 300 DPI" file that is only 800 pixels wide, it is still a small image.
The 1000 Pixel Zoom Threshold
Amazon's long-standing guidance is that images need to be at least 1000 pixels on the longest side for the zoom function to activate. Below that, shoppers can view the image but cannot zoom into it. Amazon's absolute minimum is 500 pixels on the longest side, but an image at that size will look soft and will not zoom, so treat 500 as the rejection line rather than a target.
The threshold applies per image, so a single small secondary image in an otherwise good stack will be the one image a shopper cannot inspect. Check every file, not just the main image. Amazon updates its guidance over time and some categories have their own style guides, so confirm the current figures in Seller Central before a large shoot.
Why 2000 Pixels or More Is Better
Clearing 1000 pixels turns zoom on, but it does not make zoom useful. On desktop, the zoom pane shows a magnified section of the image, and the more pixels you supply, the more real detail is available when the shopper looks closely. Many sellers and agencies work at roughly 1600 to 2000 pixels or more on the longest side, and 2000 to 3000 pixels is a comfortable target for products where detail sells, such as jewellery, fabrics, tools and electronics.
Amazon allows images up to 10,000 pixels on the longest side, but there is little benefit in going that far. Very large files take longer to upload and process and gain nothing visible for most products. A sensible standard for most catalogues is a square 2000 by 2000 pixel or 2500 by 2500 pixel canvas.
Square canvases
Amazon does not require square images, but a square canvas displays consistently in search grids and the image block, and it makes the 85% fill rule on the main image easier to judge. Using the same square size for every image also keeps your stack tidy.
Where Resolution Is Lost
A file can start sharp and still arrive on Amazon soft. Resolution is usually lost in one of these places:
- Cropping. Shooting the product small in the frame and then cropping in throws away most of the camera's pixels.
- Upscaling. Enlarging a small image in software adds pixels but not detail, and the result looks smeary when zoomed.
- Supplier images. Factory photos are often small or already compressed several times.
- Screenshots and exports from slides. Designs assembled in presentation tools often export at screen resolution.
- Heavy compression. Saving a JPEG at very low quality to reduce file size creates blocky artefacts.
- Re-saving JPEGs. Each save of a JPEG loses a little more quality, so edits should be made on a master file.
Capturing Enough Detail at the Shoot
Resolution begins with the camera. Fill the frame with the product when you shoot, leaving a modest margin for retouching and cropping. Use a tripod, a low ISO and an aperture that keeps the whole product in focus; for small products this may mean focus stacking, where several shots at different focus distances are combined into one fully sharp image.
A modern phone can produce files large enough for Amazon, but small sensors lose detail in shadows and fine textures, and phone processing can over-sharpen. If you are shooting yourself, our guide to DIY product photography covers gear and setup. Shoot in RAW where possible, because it gives you more room to correct exposure and colour without degrading the image.
Compression and File Size
JPEG is Amazon's preferred format and compresses well, but compression is a trade-off. Too little and files are needlessly large; too much and you see blocky artefacts, banding in smooth gradients and halos around edges, all of which zoom magnifies.
A JPEG quality setting in the region of 80 to 90 on a 0 to 100 scale usually gives a good balance for product images, though the exact number depends on your software, since different programs use different scales. Judge by eye at 100% view rather than by the number. Pay special attention to:
- Smooth gradients, such as a softly lit bottle, where banding appears first.
- The white background on the main image, which must remain pure white after compression.
- Fine text in infographics, which can develop fuzzy edges.
Amazon also has a maximum file size per image, and the exact limit has varied, so check the current figure in Seller Central. A 2000 to 2500 pixel JPEG at sensible quality normally sits comfortably within it.
Sharpening Without Halos
Almost every digital image benefits from some sharpening, but over-sharpening is one of the most common faults in Amazon images. It shows up as bright or dark outlines around edges, gritty textures and a crunchy, artificial look when zoomed.
A sound approach is to sharpen in two stages. Apply gentle capture sharpening during RAW processing to recover the softness the camera introduces. Then apply light output sharpening as the final step after resizing, because resizing softens the image. Always judge sharpening at 100% zoom, which is roughly what an Amazon shopper sees in the zoom pane, not at the fitted view on your monitor. Retouching steps such as dust removal and colour correction belong before output sharpening; see our article on retouching product photos for that workflow.
Recommended Export Settings
A reliable export preset for most listings looks like this:
- Dimensions: 2000 to 2500 pixels square for most products, larger for detail-led products.
- Format: JPEG. TIFF, PNG and non-animated GIF are also accepted, but JPEG keeps files manageable.
- Colour profile: sRGB, embedded. Amazon accepts sRGB or CMYK, but sRGB is the safer choice for consistent colour on screens.
- Quality: high, judged visually; avoid maximum settings that bloat files for no visible gain.
- Sharpening: light output sharpening for screen.
- Metadata: strip unnecessary metadata such as camera location data.
Save this as a preset in your editing software so every designer and photographer produces matching files. Keep layered or RAW master files separately so you never need to edit a JPEG twice.
Infographics and Text at High Resolution
Designed images have their own resolution risks. If an infographic is built on a small canvas and then enlarged, text and icons become soft. Build infographics at your final export size or larger from the start, and place product photos into the design at full resolution rather than as small pasted crops.
Vector icons and live text stay sharp at any size inside the design file, but once exported, they become pixels like everything else. Check zoomed text carefully, because soft lettering makes a brand look careless. How large that text needs to be for phone shoppers is a separate question, covered in our guide to designing images for mobile.
A Worked Example: Fixing Soft Images on a Leather Wallet
A seller of handmade leather wallets noticed that reviews praised the stitching, yet the listing images gave no sense of it. On inspection, the main image was 1200 pixels square, so zoom worked, but zooming in showed blurred stitching and blocky compression artefacts in the leather grain. The secondary images were supplied by the workshop at 900 pixels and could not be zoomed at all.
The fix had four parts. First, the wallets were reshot on a tripod with the product filling most of the frame, using focus stacking so the front edge and the stitching at the back were both sharp. Second, RAW files were processed with gentle capture sharpening and retouched for dust and loose threads without altering the leather's real texture. Third, everything was exported at 2500 pixels square as sRGB JPEGs at a high quality setting, with light output sharpening judged at 100% view. Finally, the 900 pixel secondary images were replaced, not upscaled.
The result was a stack where every image zoomed, and the zoomed main image showed individual stitches and the grain of the leather clearly, which was the very quality customers valued. The seller kept the master files and the export preset so future colours could be shot to the same standard.
Checking Zoom After Upload
Do not assume a file looks the same live as it did on your monitor. After uploading, and once processing is complete, open the listing on desktop and hover over each image to confirm zoom appears. Then open it in the Amazon app and pinch to zoom. Look for softness, banding, halos and any grey tint creeping into the white background. If an image does not update or zoom does not appear, the upload process may still be catching up; our guide to uploading images in Seller Central covers processing delays and common fixes.
Resolution and Zoom Checklist
- Specify image size in pixels, not DPI, in every brief.
- Every image is at least 1000 pixels on the longest side, ideally 2000 or more.
- No image has been upscaled from a smaller source.
- The product fills the frame at the shoot, so little cropping is needed.
- Edits are made on master files, with JPEGs exported only at the end.
- JPEG quality is judged visually at 100% view.
- Sharpening is light and free of halos.
- Files are exported in sRGB with a consistent preset.
- Infographics are built at final size with sharp text.
- Zoom is checked live on desktop and in the app after upload.
Crisp, zoomable images give shoppers the confidence to buy without touching the product. If you want images shot, retouched and exported to a consistent high standard, see Desnora's Amazon listing image design service or contact us.
Frequently Asked Questions
What resolution do Amazon images need for zoom?
At least 1000 pixels on the longest side. Below that size, shoppers can view the image but the zoom feature is not offered.
What is the best image size for Amazon?
Many sellers use a square canvas of around 2000 to 2500 pixels. It clears the zoom threshold comfortably and gives shoppers real detail when they zoom in.
Does DPI matter for Amazon images?
No. On screens only the pixel dimensions matter. A 2000 pixel image looks the same whether it is tagged 72 or 300 DPI.
What is the maximum image size Amazon accepts?
Amazon allows up to 10,000 pixels on the longest side, but files that large rarely improve what shoppers see and are slower to upload and process.
Can I upscale a small image to meet the zoom threshold?
You can technically, but the enlarged image will look soft when zoomed because upscaling adds pixels without adding detail. Reshooting or sourcing a larger original is far better.
Which file format is best for quality?
JPEG is preferred and works well at a high quality setting. TIFF and PNG are accepted too, but they create much larger files with little visible benefit for photographs.
Should I use sRGB or CMYK?
Amazon accepts both, but sRGB is the safer choice because it matches how most screens display colour and reduces unexpected colour shifts.
Why does my image look blurry when zoomed?
Common causes are a small original that was cropped or upscaled, heavy JPEG compression, camera shake or missed focus. Check the original file at 100% view to find the source.
How much should I sharpen Amazon images?
Lightly. Apply gentle sharpening after resizing and judge it at 100% view. If you can see bright or dark outlines along edges, it is too much.
Do secondary images need to be high resolution too?
Yes. Zoom works per image, so a small secondary image will be the one shoppers cannot inspect. Treat every slot to the same standard.
Can a phone camera produce large enough images?
Most modern phones produce enough pixels, but small sensors can lose detail and over-process textures. Good light, a tripod and careful editing help close the gap.
Why does zoom not appear after I uploaded a large image?
Processing can take time after an upload. If zoom still does not appear later, check the live file size and confirm the correct image replaced the old one.