Resize Images Online
Set exact pixel dimensions or scale by percentage. Lock aspect ratio so nothing gets warped. Free, private, no upload.
Drop your image to resize
JPG, PNG, WebP, GIF supported
How to resize an image
Upload your image
Drop your JPG, PNG, WebP or GIF onto the tool. Or click to browse. Your file stays on your device.
Enter dimensions
Type the width and height you want in pixels. Or switch to percentage mode and scale by a fraction of the original.
Lock or unlock aspect ratio
The padlock button keeps proportions intact. Unlock it if you want to stretch the image to a specific shape.
Resize and download
Hit Resize Image. Preview the result. Download it. Done.
When do you need to resize an image?
More often than you'd think. Your phone takes photos at 12 megapixels or more, which is great for printing but complete overkill for a website, an email, or a profile photo. A 4000px wide image on a website that displays it at 800px wide is wasting bandwidth and slowing your page down for no reason.
Social media platforms also have specific size requirements. Instagram wants square images at 1080x1080. Twitter thumbnails work best at 1200x675. LinkedIn posts perform better at 1200x627. If you just upload whatever size you have, the platform crops it for you — usually badly.
Forms and upload fields sometimes have strict size limits too. A government form that only accepts files under 2MB won't tell you to resize the image, it'll just reject it. Resize first, upload second.
Pixels vs percentage: which should you use?
Use pixels when you have a specific target size in mind. "I need this image to be 1200px wide." Type 1200.
Use percentage when you just want to make the image smaller without caring about the exact final dimensions. "I need this image to be half the size." Set 50%.
What happens to the pixels when you resize
Making an image smaller and making it larger are different operations, and only one of them is safe.
Shrinking combines several original pixels into each new one, averaging their colours. Detail merges together, which is why a downsized photo can look very slightly softer than the original. A light touch of sharpening afterwards restores the crispness.
Enlarging has to invent pixels that were never captured, by blending the colours of their neighbours. It can make an image bigger but it cannot add detail, so large enlargements look smooth and blurry rather than sharp.
The middle column explains why resizing is such an effective way to cut file size. Halving the width and the height leaves only a quarter of the pixels, and a photo's file size tends to fall in similar proportion.
Resizing for sharp screens
Phones and many laptops have high density displays that pack two or three physical pixels into each point of layout. An image shown 600 points wide on such a screen has 1200 or more physical pixels to fill. If it only has 600, it looks slightly soft.
For images on your own website, a common approach is to export at about twice the width they are displayed at. For social platforms it rarely helps, because they resize everything to their own dimensions on upload.
The order that gives the best result
When an image needs several changes, doing them in this order keeps the most quality: crop first, then resize, then sharpen, then compress. Cropping first means you never resize pixels you are about to discard, and compressing last means compression artifacts are never enlarged or sharpened.