Resize an image
You set the width and height yourself — lock the ratio, or take one of the ready-made sizes.
How to use it
Drop the image in
Drag it over or click to choose. The fields fill with the file's own dimensions, so you start out seeing exactly what you are changing.
Give it a size
Three ways in: type the pixels, pick a percentage, or take a ready-made size. With the ratio locked you only fill one edge — the other works itself out.
Compare and download
Before and after sit side by side; the line underneath gives the new size and the file size. Not happy? Change the number — the result refreshes instantly.
What the ratio lock does
The image keeps its shape
You type one edge, the other follows the original ratio. The photo neither squashes nor stretches. In almost every case this is the right choice.
Forced into the size
You decide both edges; if the ratio does not match, the image stretches. An upload form that insists on “exactly 1080×1080” may need it — but look at the result before you download.
If you need a square without wrecking the framing, the answer is not stretching but cropping; cropping is not in this tool — it lives in the editor of Background Remover.
Scaling down and scaling up are not the same job
Near enough lossless
Dropping pixels is easy: the browser blends neighbouring pixels into a clean smaller image. The result is almost always tidy.
Adds no detail
The browser cannot invent a pixel that was never there; it only stretches the ones it has, and the picture goes soft. The tool warns you when it spots this.
If you really want it bigger, Image Upscaler rebuilds the lost detail with AI — it does not stretch, it draws.
Sizes people ask for
Instagram square
The square post. For a portrait post, 1080 × 1350 takes up more of the feed.
Full HD
Slides, video covers, screen backgrounds. Usually more than enough for the web.
LinkedIn cover
A very wide strip; it will not sit in that size unless you unlock the ratio.
Profile picture
The safe square size that most platforms accept.
Common questions
Does the file size come down too?
Usually yes — fewer pixels, smaller file. But the real lever is quality. If you have to get under a specific file size, Compress Image takes a target size and works out the quality itself.
My image is over the size limit on an upload form
Type the size the form asks for into the pixel fields. If the limit reads something like “2000 px max”, keep the ratio locked and set the long edge to 2000.
Can I resize several images at once?
One file at a time for now. Batch work is being considered as a separate tier; single files stay unlimited on the free one.
My transparent PNG came out on a white background
The output format is set to JPG — JPG carries no transparency, so transparent areas turn white. Set the format to “Keep as is” or PNG.