Resize images to any dimension while maintaining aspect ratio
An image resizer modifies pixel dimensions of photos using client-side canvas scaling filters to ensure high visual quality.
Upload the image, keep the aspect ratio lock on, enter the new width or height and download. Making an image smaller keeps it sharp, while enlarging it beyond its original pixel size always softens detail because the browser has to invent pixels.
Select your image, then type the target width and height in pixels. With the ratio lock on, changing one value updates the other automatically. Unlock it if you need exact dimensions that differ from the original proportions, but the picture will be stretched.
Use JPEG for photos that must work everywhere, WebP for websites where smaller files matter, and PNG for screenshots, logos or anything with sharp edges or transparency. The tool exports all three, and the quality slider applies to WebP and JPEG but not PNG.
File size depends on format and quality as well as pixel dimensions. Exporting a JPEG as PNG, or keeping quality at a high setting, can produce a larger file even at fewer pixels. Try WebP or JPEG at about 70 to 85 percent quality and compare the size shown after processing.
No. The image is drawn onto a canvas and re-encoded by your own browser, so the file is never sent to a server. That also means it works offline once the page has loaded, and large images are limited only by your device memory.
A resizer changes the pixel dimensions of a picture, for example 4000 by 3000 down to 1200 by 900. A compressor keeps the dimensions and lowers the file size by reducing quality. For web use you often want both, and this tool lets you change size and quality together.
No. Toolskyt operates under a zero-server policy. All calculations, data formatting, and file exports are executed locally on your machine.
No, this tool is 100% free. There are no limits, sign-ups, subscriptions, or hidden charges required.
Export your image as WebP or PNG format. Standard JPEG format does not support transparent layers and will convert transparency to white.