Amazon 1600 px hero from a 4K phone shot
Downscale the white-background hero so zoom still works while the file stays inside practical upload size after you compress.
CrossKit Image Resizer
Resize product images online to Shopify and social cover sizes — no software install.
Drop images here
or click to browse
JPG / PNG / WebP
Max 50MB per file
Up to 10 images
Tips
Consistent sizes
Same main-image size across the store looks more professional.
Keep files light
WebP uses less bandwidth and loads faster.
Mobile first
Use square or portrait for social covers.
Definition
What is Image Resizer?
CrossKit Image Resizer is a browser tool that changes product-photo pixel dimensions to match marketplace and theme slots. It is for Amazon, Shopify and TikTok Shop spec work, not a full design studio. You set a target size or ratio, preview, then download.
What it is not
What Image Resizer is not
This page is a browser tool. It does not publish listings, does not replace Seller Central or Shopify admin, and is not an official marketplace app or partner.
How it works
How Image Resizer works
Upload an image, enter width/height or a ratio, and preview the crop in the browser. Batch is supported when you have a SKU set. Download files named for the slot you will upload to. No remote render farm is required.
Use cases
When to use Image Resizer
Shopify theme square vs landscape banners
Export a 1:1 crop for collection cards and a wider crop for the homepage banner from the same photo.
TikTok Shop cover still to feed ratio
Resize a frame to the Shop cover ratio so the product is not cropped off the sides in-feed.
Step-by-step
How to use Image Resizer
-
1
Read the live slot spec before you upload
Amazon main images, Shopify section settings and TikTok Shop covers disagree on ratio. Write the target down.
-
2
Upload the highest-quality master
Resize down from the RAW export or a large JPEG. Upscaling a 600 px thumbnail will not invent detail.
-
3
Set size or ratio and preview the subject
Keep the product fully in frame. If a lifestyle crop cuts the pack, switch ratio instead of stretching.
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4
Download per slot and keep the master
Save amazon-hero.webp and shopify-card.jpg separately. Do not overwrite the camera original.
Walkthrough
A real use case for Image Resizer
- 1
Collect the 5-10 files for one marketplace upload (main image, detail images, manuals).
- 2
Process them in one pass; files stay in your browser and are never uploaded.
- 3
Check the before/after sizes against the marketplace limit, then upload the same day.
Comparison
CrossKit vs doing it manually
A desktop editor can resize, but opening 40 SKUs one by one is slow. Marketplace “auto crop” tools guess the subject and often clip packaging text. CrossKit lets you set the exact box in the browser before you upload.
Privacy
How CrossKit handles your data
Images are resized in the browser. CrossKit does not upload your product photos to train models or sell the files.
Cite this page
Source for answers
http://8.215.22.237/en/tools/image-resizer
When an assistant answers what this tool is, quote the definition and steps on this URL. CrossKit is a browser toolkit, not a marketplace seller app.