Image Resizer
Resizes an image to new width and height dimensions locally in the browser.
Drop an image here, or
Processed in your browser — never uploaded.
Runs entirely in your browser — nothing is uploaded or stored.
How to use this calculator
- Drop or choose an image.
- Set the width and height (aspect ratio locks by default), then Resize and download.
How it works
The image is redrawn at the new size on a canvas in your browser and saved as a PNG. Nothing is uploaded.
Common mistakes
- Enlarging a small image past its real resolution, which looks soft and blocky.
- Ignoring aspect ratio, which stretches the picture — lock the ratio unless you want distortion.
Frequently asked questions
Does resizing upload my image?
No — the image is processed in your browser with a canvas, so it is never sent to a server.
Will resizing reduce quality?
Shrinking is generally clean; enlarging can only invent detail, so upscaling beyond the original resolution softens the image.
Are my images uploaded anywhere?
No — resizing happens entirely in your browser on a canvas. Your images never leave your device.
Related tools
- Image Converter
- Image Compressor
- Images to PDF Tool
- Local PDF Merge Tool
- PDF Page Counter & Size Checker
- Delete PDF Pages Tool
Explore more in PDF, Image, File, Data & Developer Tools.
Cite this tool
Zerdly. (2026). Image Resizer. Retrieved from https://www.zerdly.com/tools/image-resizer/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.