How to use the Resize Image by Percentage
- Drop your image — Percent mode is on at 50%.
- Move the slider or type another percentage.
- Download the scaled image.
Percentage and file size
Scaling to 50% keeps a quarter of the pixels, so the file usually becomes three to four times smaller. To hit an exact file size instead, use Compress Image to 100 KB or the Image Compressor.
Also searched as: scale image by percent, reduce image size by 50%, resize image 50 percent, shrink image by percentage.
Tools that pair well with the Resize Image by Percentage
- Image Resizer — Resize a photo to exact pixel dimensions or a percentage, crop it to fill a social-media size, or fit it inside a frame with a background color — all locally in your browser.
- Image Converter — Convert any image your browser can open — PNG, JPG, WebP, AVIF, GIF, BMP or SVG — into PNG, JPG, WebP or AVIF, one file or hundreds at a time.
- Image Cropper — Drag the frame or type exact pixels to crop a photo — square, 16:9, Instagram 4:5, Open Graph 1.91:1 or a perfect circle — then download it as PNG, JPG or WebP.
- Barcode Generator — Make scannable barcodes for products, inventory, shipping and libraries — check digits are calculated for you, and you can download a sharp SVG for print or a PNG for documents.
Frequently asked questions
Does 50% make the file half the size?
Usually smaller than half: 50% width and height means a quarter of the pixels.
Are the proportions kept?
Yes. Width and height are scaled by the same percentage.
Is my image uploaded?
No. Scaling happens in your browser.
Can I install Resize Image by Percentage as a web app and use it offline?
Yes. Resize Image by Percentage is an installable web app (PWA) — installed from your browser, not downloaded from an app store. Click Install app at the top of this page in Chrome or Edge (Windows, macOS, Linux, ChromeOS) or on Android, use Share → Add to Home Screen on iPhone and iPad, or File → Add to Dock in Safari 17+ on a Mac. It then opens in its own window with its own icon, and because it runs entirely in your browser it keeps working offline. Firefox on desktop can’t install web apps. How installing works.