Amazon image spreadsheet preparation starts with SKU mapping — one row per image, linking each product to its main image and gallery slots. Keep image URLs public (no login required), name files by SKU or ASIN, apply main/secondary image order, and run a QA pass on file sizes, extensions, and image content before uploading through Seller Central or a inventory CSV.
Amazon enforces strict product image requirements, and most upload rejections start with a messy spreadsheet: duplicate filenames, no main image marker, private CDN URLs that break after the sheet is created, or gallery images placed before the main product photo. A structured image spreadsheet eliminates these problems before they reach the Seller Central upload screen.
The workflow has four steps: build a clean source sheet, download images locally with SKU-based filenames, review and retry failures, then import the final image set to Amazon. A desktop tool such as Sheet Image Downloader handles the bulk download step and produces an organized, reviewable image package.
What should an Amazon product image spreadsheet include?
Amazon product image uploads are driven by SKU or ASIN matching. The spreadsheet should contain every piece of information needed to match a downloaded image file back to its product listing, in the correct upload order, with a clean filename.
The key difference from a simple image list is the image role and position columns: these tell Amazon Seller Central which image is the main listing photo and which are gallery additions. Without those columns, the upload tool guesses the order, and the listing can display with the wrong hero image.
Recommended columns for SKU, image role, image URL, filename, and folder
Use one row per image. If a product has eight photos, the SKU appears on eight rows with different image positions. This makes filename generation, failure tracking, and upload order management straightforward.
| Column | Example | Why it matters for Amazon |
|---|---|---|
| SKU / ASIN | SKU-1001 | Links every image to the correct product listing in Seller Central inventory. |
| Product title | Blue Running Shoe Size 10 | Human-readable context when reviewing image-product matches. |
| Image URL | https://cdn.example.com/sku-1001-main.jpg | Source link for bulk downloading — must be a public, direct image URL. |
| Image role | main, gallery | Tells Amazon whether this is the hero image or a gallery addition. |
| Image position | 01, 02, 03 | Controls upload order. Position 01 must always be the main product image. |
| Desired filename | SKU-1001-01.jpg | Replaces random CDN names with predictable SKU-based filenames on disk. |
| Folder / category | footwear/running | Keeps batches organized by category, supplier, or upload batch. |
| Status / notes | checked, retry, rights approved | Tracks review state so only cleared images are imported to Amazon. |
Main image vs additional images: how to avoid mixing order
Amazon requires the first image in the upload sequence to be a pure-white-background main product image. Gallery images must not precede it — if they do, Amazon may reject the main image or display the wrong photo as the listing hero.
The most reliable way to prevent this is to reserve position 01 for the main image in the spreadsheet, and enforce a position 01 = main rule in your QA check. Additional images start at 02.
| Image type | Filename pattern | Position | Example |
|---|---|---|---|
| Main product image | {sku}-01 | 01 | SKU-1001-01.jpg |
| Gallery image | {sku}-{position} | 02–08 | SKU-1001-02.jpg |
| Swatch / variant | {sku}-{variant}-{position} | any | SKU-1001-red-01.jpg |
How to clean supplier image URLs before downloading
Supplier image URLs are the most fragile part of any image spreadsheet. They can redirect, expire, require a login session, return an HTML page instead of an image, or use a CDN that hotlink-protects the content after the sheet is built.
Before running the full download, clean the URL list by checking three things:
- Public access: the URL must work in an incognito browser with no login required. If it returns a sign-in page or CAPTCHA, replace the URL or download from an alternative source.
- Direct image link: the URL should end in an image extension (.jpg, .jpeg, .png, .webp, .gif). If it points to a page that renders an image via JavaScript, find the direct image URL or use a browser screenshot tool.
- Stable endpoint: URLs from supplier CDNs that require session cookies or expire after a set time should be replaced with archived or alternative public URLs before the download runs.
How to name downloaded image files by SKU or ASIN
SKU-based filenames make the image package auditable. When every file embeds the product identifier, you can sort the download folder by name and immediately see which images belong to which product without opening any files.
A practical naming pattern for Amazon image packages:
{sku}-01.jpg— main product image (position 01){sku}-02.jpg,{sku}-03.jpg— gallery images{sku}-{variant}-{position}.jpg— variant images with color or material suffix
If you are working with ASIN instead of SKU, substitute ASIN for SKU in the pattern. The important part is consistency: every file in the same product group follows the same naming template so the spreadsheet row maps predictably to the downloaded file.
Sheet Image Downloader can apply SKU-based filenames automatically during the download pass using a pattern you define in the spreadsheet columns, so the filename column and the downloaded file on disk always match.
Common spreadsheet mistakes before Amazon upload
These mistakes account for most Amazon image upload failures:
- Multiple image URLs in one cell. Split them into one row per image so position, filename, and retry logic stay clean.
- No main image marker. A missing or incorrect position-01 image causes Amazon to reject the main photo or use the wrong gallery image as the hero.
- Private or session-based URLs. URLs that require login, redirect, or expire after the sheet is created will fail at download time or after upload.
- Missing file extensions in filenames. Include
.jpg,.webp, or.pngin the desired filename column so downloaded files are recognized by the upload tool. - No status column. Without a validation status column, failed rows are hard to find in large catalogs. Add
ready,retry, orblockedso the QA pass has a clear to-do list.
Local workflow with Sheet Image Downloader
Sheet Image Downloader reads the spreadsheet, follows the filename and folder columns, and downloads all image rows to local storage — no cloud upload, no third-party server touching your product data. After the download, it produces a retry report so you can fix only the failed rows.
Build the source sheet
Add one row per image with SKU, image URL, role, position, filename, folder, and status columns.
Run a sample pass
Download 5–10 rows first to confirm URL quality, filename output, and folder structure.
Download the full set
Sheet Image Downloader saves files locally with SKU-based filenames and category folders.
Retry failures, then upload
Fix the retry report rows, run a focused retry, then import the reviewed image package to Amazon.
If you need a spreadsheet template with the right columns, see How to Build a Product Image URL Spreadsheet Template for Bulk Downloads. For the companion download guide, see How to Bulk Download Product Images from a Spreadsheet.
FAQ
What columns should an Amazon product image spreadsheet include?
Include SKU or ASIN, product title, image URL or local filename, image role (main or gallery), image position number, desired filename, folder or category, and a validation status column. The minimum required is SKU, image URL, image position, and filename.
What is the image order rule for Amazon listings?
Amazon requires the first image (position 01) to be the pure-white-background main product image. Gallery images must not appear before the main image in the upload order, or the listing may be rejected or misordered.
Should I download supplier image URLs before uploading to Amazon?
Yes. Downloading images locally first lets you review file quality, rename them with SKU-based filenames, verify the main image is correct, and retry broken URLs before the Amazon import begins. Source URLs can expire or redirect after the spreadsheet is created.
How do I name Amazon product images by SKU or ASIN?
Use a pattern like SKU-01.jpg for the main image and SKU-02.jpg, SKU-03.jpg for gallery images. This makes downloaded files auditable, prevents duplicate filenames, and maps cleanly to the Amazon inventory upload row for each product.
What are the most common spreadsheet mistakes before Amazon upload?
The most common mistakes are: putting multiple image URLs in one cell, missing or misordered main images, using private or session-based URLs that expire, leaving file extensions out of filenames, and not marking a validation status column so failed rows are easy to find.
Download your Amazon product images from one clean spreadsheet.
Sheet Image Downloader reads your image URL spreadsheet, applies SKU-based filenames, organizes folders, and produces a retry report before you upload to Amazon Seller Central. Try it locally — no cloud, no sign-up required. For support, use the contact page.