Checking upload specs
Confirm image width, height, and file size before you upload assets to a CMS, ad platform, product listing, or social scheduler.
Image Dimension Checker
Image Dimension Checker is built for upload checks and design handoff reviews. Use it to confirm width, height, aspect ratio, and file size before you send an asset to a CMS, ad platform, storefront, or content team.
Tool interface
What this tool does
Image Dimension Checker shows image width, height, aspect ratio, and file size so you can confirm upload specs, ad sizes, CMS slots, and design handoff requirements.
Related next steps include Image Resizer, Image Metadata Viewer, and the Image & Media Tools page if you want to keep working on the same task from a different angle.
When to use it
Use it before uploads, ad submissions, CMS placement, or design handoff when the exact width, height, aspect ratio, or file size matters. It is useful whenever a platform or teammate expects a precise image spec.
If the asset needs resizing after the check, continue with Image Resizer. For broader media-prep workflows, the Image & Media Tools page is the best next stop.
How to use it
Upload the image and read the width, height, aspect ratio, and file size before you send the asset anywhere else.
- Choose an image from your device so the browser can inspect it locally.
- Read the reported dimensions, aspect ratio, and file size.
- Compare those details against your upload or placement requirements before moving on.
Example
This example shows the kind of input and output the tool is designed to handle in a typical browser workflow.
Example input
Upload image mockExample output
Width and height previewCommon use cases
Reviewing design handoffs
Use it to verify that exported images match the dimensions a designer or developer requested.
Comparing asset ratios
It helps when you need to spot whether an image fits a slot such as 1:1, 4:5, 16:9, or another expected aspect ratio.
Fixing the image afterward
If the file needs resizing once you confirm the specs, continue with Image Resizer.
FAQ
What does Image Dimension Checker do?
Image Dimension Checker shows image width, height, aspect ratio, and file size so you can confirm upload specs, ad sizes, CMS slots, and design handoff requirements.
When should I use Image Dimension Checker?
Use it before uploads, ad submissions, CMS placement, or design handoff when the exact width, height, aspect ratio, or file size matters. It is useful whenever a platform or teammate expects a precise image spec.
How is Image Dimension Checker different from Image Resizer?
Image Dimension Checker focuses on this exact task. Use Image Resizer when you need to resize uploaded images by width and height directly in the browser for CMS uploads, social assets, and content production instead.
Does Image Dimension Checker run in the browser?
Yes. This tool runs in the browser so you can work with the input on the page without sending it through a custom backend on this site.
What should I use after Image Dimension Checker?
A good next step is Image Resizer or the Image & Media Tools page.
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