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Image resizer and converter

Resize an image to exact dimensions and convert its format.

Drop a file here

Accepted: PNG, JPEG, WEBP. Max size 20 MB.

Or paste with Ctrl+V / ⌘V.

Settings

Leave both empty to only convert the format.

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In short

CatTower's image resizer is a free online tool that resizes PNG, JPEG and WebP images to exact pixel dimensions and converts them between those three formats.

  • Input and output: PNG, JPEG and WebP.
  • Up to 20 MB per image.
  • Keeps the aspect ratio by default, with an adjustable quality setting.
  • Images are processed on request and not stored.
  • Free, with no sign-up.

Use cases

  • Shrink a large photo before attaching it to an email or a web form.
  • Convert a PNG screenshot to a lighter JPEG or WebP.
  • Fit an image to the exact size a profile, listing or slide asks for.

How to use

  1. Upload a PNG, JPEG or WebP image.
  2. Enter a width and/or height, and pick an output format.
  3. Select Resize image and download the result.

FAQ

No. Images are processed on request and not stored.

Yes by default. If you give both width and height, the image is fitted inside that box.

20 MB per image.