Resize an image
Drop in a picture, type the size you need, and download it. The file stays on your machine the whole time.
Resizing runs in this tab using your browser's image engine. Your picture is never uploaded.
How to use it#
- Drop in a PNG, JPG or WebP image.
- Type the width or height you need. With the ratio locked, the other edge follows.
- Click Resize and download. The file keeps its original format.
Sizes worth knowing#
Most upload limits are really pixel limits in disguise. A profile photo rarely needs to be wider than 800 pixels, and an image inside a document almost never needs more than 1500. A full-width web banner tops out around 1920, and past that you are storing detail no screen will show.
Going the other way, do not enlarge much. Scaling a 400-pixel image up to 1200 invents two thirds of the pixels and always looks soft. Start from the largest original you have.
Why the aspect ratio lock matters#
Unlocking the ratio lets you force an image into an exact box, and what comes out is a stretched face or a squashed logo. It is the usual reason a resized image looks subtly wrong.
Leave the lock on and set the edge that actually constrains you, which is usually width. If you genuinely need a fixed box, resize to the larger dimension here and crop the rest.
Format is preserved#
A PNG comes back as a PNG, a JPG as a JPG, a WebP as a WebP, so nothing about transparency or compression behaviour changes unexpectedly. The output filename carries the new width, which saves you from a folder of files all called the same thing.
If you want a different format as well as a different size, resize first and then run the result through one of the converters.
Frequently asked questions#
Does resizing reduce the file size?
#
Almost always, and dramatically: halving both edges leaves roughly a quarter of the pixels. It is usually the most effective way to get a photo under an upload limit.
Can I enlarge a small image?
#
You can, but the tool cannot invent detail that was never captured. Your browser interpolates between existing pixels, so the result looks softer the further you push it.
Will transparency survive?
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Yes for PNG and WebP, which keep their alpha channel through the resize. JPG never had transparency to begin with.
Is there a maximum image size?
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The tool imposes none. Very large images can exhaust memory on phones and tablets, in which case the browser reports that the image could not be read.
Are my images sent anywhere?
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No. The decoding, the resize and the re-encode all happen inside this page, so nothing is uploaded or logged.