01
How to check image dimensions
Choose a JPEG, PNG, or WebP file and the browser reads its intrinsic width and height locally. No image or filename is sent to Look Atlas.
Image ToolsFREE · NO SIGNUP
Image Size Checker
Check image dimensions, aspect ratio, megapixels, format, and file size locally, then compare the file with your own pixel and byte targets.
FREE TO USEA LOOK ATLAS TOOL
01 USE IT NOW02 NO ACCOUNT03 FIELD NOTES BELOW
BROWSER-LOCAL INSPECTION
NO UPLOADMeasure the file before handoff.
LOCAL RESULTWAITING
Image check
NO FILE YET
intrinsic pixels + local file bytes + optional target checksChoose a supported image to reveal dimensions, ratio, megapixels, format, and bytes.
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MEASURE BEFORE EXPORT
Know exactly what the file carries.
A product image has a shape, pixel count, format, and byte weight. Reading those facts before upload makes every marketplace handoff calmer.
WORKING VIEW
READY1200 × 1500 PX
METHODintrinsic pixels + local file bytes + optional target checks
WORKING NOTE4:5 ratio · 1.8 MP · JPEG · 240 KB at the supplied limit
INPUTS → CLEAR OUTPUT
THE FIELD NOTES
Quick answer above. Better decisions below.
Use the result now, then read the practical notes for assumptions, examples, limitations, and the choices behind it.
1200 × 1500 PXREADY
4:5 ratio · 1.8 MP · JPEG · 240 KB at the supplied limit
02
Compare exact pixel targets
Enter a target width or height only when a channel, template, or teammate has given you a specific requirement. Each supplied target gets its own labeled result.
03
Read bytes without guessing compression
The checker reports the current file byte length exactly. It does not estimate what a future JPEG, PNG, or WebP export might weigh.
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What the image check cannot prove
Dimensions and bytes do not prove sharpness, correct crop, truthful color, good composition, complete alt text, or platform acceptance.
THE CHECKED PRODUCT IS NEXT
Turn the checked product into the campaign.
Use Look Atlas to transform one clean product photo into premium on-model ecommerce imagery for your store, ads, and social channels.TRY YOUR FIRST SHOOT FREENO CREDIT CARD REQUIRED
How to check image dimensions
Choose a JPEG, PNG, or WebP file and the browser reads its intrinsic width and height locally. No image or filename is sent to Look Atlas.
The reduced ratio and megapixel count come from those decoded pixel dimensions, while the byte value comes directly from the local file object.
Compare exact pixel targets
Enter a target width or height only when a channel, template, or teammate has given you a specific requirement. Each supplied target gets its own labeled result.
A passing width does not hide a failing height. The result shows measured and target values together so the next edit is clear.
Read bytes without guessing compression
The checker reports the current file byte length exactly. It does not estimate what a future JPEG, PNG, or WebP export might weigh.
The maximum file-size comparison is inclusive, so a file exactly equal to the supplied limit passes.
What the image check cannot prove
Dimensions and bytes do not prove sharpness, correct crop, truthful color, good composition, complete alt text, or platform acceptance.
Use the result as a precise file-facts check, then review the visible product image and the current channel rules separately.
Questions, answered.
How do I check the size of an image?
Choose a JPEG, PNG, or WebP file. The checker reads its pixel width, height, aspect ratio, megapixels, format, and exact file bytes in your browser.
Does this image size checker upload my file?
No. The file is decoded locally in your browser and its contents, filename, dimensions, and target values are not sent to Look Atlas analytics.
Do matching dimensions guarantee marketplace approval?
No. A platform can also evaluate format, byte limits, crop, subject placement, metadata, content rules, and other requirements this checker does not model.
BUILT BY LOOK ATLAS
Your product deserves more than a marketplace thumbnail.
Turn a simple product photo into polished, campaign-ready creative for your store, ads, and social channels. No studio. No reshoots.
Create your first shoot free, then keep going when you’re ready.
01 PRODUCT PHOTO → CAMPAIGN