How to use Resize Image
- Choose or drop one or more images.
- Choose “By pixels” or “By percentage”.
- Enter the new size – the aspect ratio lock prevents stretching.
- Click “Resize” and download.
Examples
- Resize a 4000×3000 photo to 1200 px wide for a website: height becomes 900 px automatically.
Supported formats
| Input | JPG, PNG, WebP |
|---|---|
| Output | JPG, PNG, WebP |
| Processing | On your device, in the browser (no upload) |
Limitations to know
- Enlarging an image cannot add detail; it will look softer.
- Animated GIFs are not supported (only the first frame would be kept).
Privacy: Resize Image runs entirely in your web browser. Your JPG/PNG/WebP data is not uploaded, stored or shared, and nothing about its contents is sent to analytics.
Frequently asked questions
How do I resize an image to specific dimensions?
Select “By pixels”, type the width (and height if you unlock the ratio), and click “Resize”. The output has exactly the dimensions you entered.
Does resizing reduce file size?
Usually yes – fewer pixels means a smaller file. Combine with Compress Image for the smallest result.
Last updated · Maintained by the ZippyToolkit team