How to resize an image
Drag one or more images onto the box, select “choose files”, or paste an image from your clipboard. The tool accepts JPG, PNG and WebP files, and AVIF files in browsers that can open them.
Choose how to set the size. Pixels takes an exact width and height. Percent scales the image up or down, such as 50% for half the size. Print size takes centimeters, millimeters or inches plus a DPI value and works out the pixels for you.
Keep Lock aspect ratio on if the picture must not stretch: type the width and the height follows, or the other way round. Turn it off only when you need an exact shape that differs from the original, then choose whether to crop, fit or stretch.
Optionally set a maximum file size in KB, pick an output format, and download each image on its own or select “Download all (ZIP)”. The new dimensions and file size are shown next to every result, so you can check both before you upload anything.
Pixels, percent or print size?
Use Pixels when a website or form states its rule in pixels: “600 × 600”, “at least 1200 pixels wide”, or a banner slot of 1200 × 630. Pixels are what screens and upload checks actually measure, so this is the mode most people need.
Use Percent when you just want a smaller or larger version and do not care about the exact number — halving a large phone photo before you email it, for example. Percent always keeps the original proportions.
Use Print size when the requirement is physical: a photo of 3.5 × 4.5 cm, a 2 × 2 inch print, or a 4 × 6 inch picture. The tool converts the measurement to pixels with the DPI you choose and saves that DPI in JPG and PNG files, so print dialogs and document editors know how large to place the picture. At 300 DPI, for example, 3.5 × 4.5 cm becomes 413 × 531 pixels.
Keeping the proportions
Every image has an aspect ratio: the relationship between its width and its height. A typical phone photo is 4:3, a widescreen frame is 16:9, and a square is 1:1. With the lock on, the resizer keeps that ratio, so faces, logos and text never look stretched.
When a destination demands a shape your image does not have, you have three honest options. Crop fills the new shape and trims the edges that do not fit, which suits portraits and square profile photos. Fit keeps the whole picture and adds plain margins around it. Stretch forces the picture into the new shape and distorts it, so it is rarely the right choice for photos of people. Crop trims both sides evenly, so the center of the picture stays; Fit adds white margins, or transparent ones when you save a PNG or WebP.
Resizing and file size
Resizing and compression solve different problems. Resizing changes how many pixels an image has; compression changes how many bytes each pixel costs. Fewer pixels almost always means a smaller file, which is why reducing the dimensions is often the cleanest way to get a heavy photo under a limit.
If a form gives you both rules — say, exact pixel dimensions and “under 100 KB” — turn on Maximum file size. The resizer first sets the dimensions you asked for and then lowers the quality only as far as needed to fit under the limit. It never shrinks the dimensions behind your back; if the limit cannot be met at that size, it tells you. PNG is lossless, so choose JPEG or WebP output when a photo has to fit a tight limit.
If you only care about the file size, the Image Compressor is the faster route, with ready-made pages to compress an image to 100KB, 50KB and 20KB.
Common sizes
A few sizes come up again and again. 1080 × 1080 is a square social post and 1080 × 1350 a portrait one. 1200 × 630 is the usual size for link preview images. 1920 × 1080 is Full HD, the size of many desktop screens and video frames. 600 × 600 is a 2 × 2 inch photo at 300 DPI. Platforms change their recommendations from time to time, so check the current guidance of the site you are posting to.
How the resizer works
Your images are decoded, resized and re-encoded by your own browser, on your own device. Nothing is sent to DSOOU, so there is no upload wait and no copy on a server. That makes the tool suitable for ID photos, scanned documents and personal pictures.
Making an image smaller keeps it sharp, because the tool is only combining pixels it already has. Making it larger has to invent new pixels between the existing ones, so a big enlargement looks soft rather than more detailed. For the best result, start from the largest original you have and resize down. Location and camera details are removed from every resized image.
When you leave or reload the page, the images and results are gone, so download what you need first. Read our privacy policy for details about tool input and website access logs.