If you enter only width or height, the other one is calculated automatically from the aspect ratio.
How to use Resize Image
- Select your file or drag it into the box above.
- Adjust the settings if needed.
- Click "Resize" and download the result. Everything happens in your browser.
Frequently asked questions
How do I preserve an image's proportions?
Keep the aspect-ratio option enabled and use pixel or percentage sizing. Enlarging a small image cannot restore genuine detail missing from the source.
Is Resize Image free?
Yes. Resize Image is completely free, requires no registration or account, and has no usage limits.
Are my files safe?
Yes. This tool runs entirely in your browser; your files are never uploaded to any server and never leave your device.
Can I use it on my phone?
Yes. It works in any modern browser on Android, iPhone, tablets and computers – no app to install.