Resize Image
Resize an image to a target width while keeping the aspect ratio intact.
Quick answer
Resize Image helps estimate the result from your inputs in the browser. Use the output as a planning number, then compare it with your records, provider terms, or official guidance before making a final decision.
Resizing changes the exported pixel dimensions. Keep an untouched original when the source file matters.
Calculator
Results update as you type
Formula
The math behind the result
new height = original height × (new width ÷ original width)
How it works
A clean flow from input to answer
- 1Upload the image you want to resize.
- 2Set the target width in pixels.
- 3Download the resized output with the original aspect ratio preserved.
FAQ
Common questions
Does this stretch the image?
No. Height is recalculated from the original aspect ratio, so the image keeps its proportions and never looks squashed or stretched. Set the width you need and the height follows automatically.
Can I enlarge tiny images?
Yes, but enlarging can make them look soft or blurry because there is no extra detail to add — the tool simply spreads the existing pixels over a larger area. Downsizing a large image always looks cleaner than upsizing a small one.
Does resizing happen on my device?
Yes. The image is resized in your browser and never uploaded, so private images stay on your computer.
What size should I use for the web?
Match the size to where it appears: around 1600 px wide for a full-width banner, 800 px for in-content images, and a few hundred pixels for thumbnails. Sending a huge image to a small slot just wastes load time.
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