Resize Image Online

Resize PNG, JPG, and WebP images to exact pixel dimensions in your browser. Your files are processed locally on your device and are never uploaded.

Drop a image file here

or choose a file

How to resize images

  1. Choose a image file or drag it into the box above.
  2. Enter the new dimensions, then press Resize.
  3. Download the resized image.

Set exact pixel dimensions for avatars, thumbnails, listings, or social posts. The image is resized on your device with the aspect ratio locked by default so nothing gets distorted.

Supported formats

Input: PNG, JPG, and WebP images. Output: the same format as the input, at your chosen dimensions. WebP output requires Chrome, Edge, or Firefox.

Is this private?

Yes. FormatOtter runs entirely in your browser using the built-in canvas API. Your image is never sent to a server, never stored, and never seen by anyone — it stays on your device the whole time. You can even load this page and then disconnect from the internet; the tool keeps working.

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Frequently asked questions

Will resizing distort my image?

Not with the aspect-ratio lock on (the default): changing one dimension updates the other automatically. Untick it only if you deliberately want to stretch the image.

Can I make an image larger?

Yes, but enlarging can't add detail — the browser interpolates pixels, so upscaled images look progressively softer.

Does resizing reduce file size?

Usually, yes — fewer pixels means less data. For maximum savings, resize first, then run the result through the compress tool.