S
SpecShot

Resize Image

Set an exact width and height in pixels, or scale the whole image by a percentage. The aspect-ratio lock keeps the proportions intact so nothing ends up stretched, and you can switch it off when a target size demands exact dimensions.

Resize an image

Change the dimensions by exact pixels or by percent — entirely in your browser.

How to resize an image

  1. Choose an image from your device, or drop it straight onto the page.
  2. Enter a target width or height in pixels, or pick a percentage to scale by.
  3. Leave the aspect-ratio lock on to keep the shape, or unlock it to force exact dimensions.
  4. Download the resized file. The original on your device is left untouched.

Frequently asked questions

Will resizing make my image blurry?
Making an image smaller is safe — detail is discarded but what remains stays sharp. Making it larger is not: the extra pixels have to be invented by interpolation, so an upscaled photo always looks softer than one taken at that size. As a rule, never enlarge a photo you intend to print.
What is the difference between resizing by pixels and by percent?
Pixels give you an exact result, which is what you want when a form demands, say, 600 × 600. Percent is proportional, which is easier when you just need 'half the size' across a batch of images with different starting dimensions.
Does resizing change the file size too?
Almost always yes — fewer pixels means less data to store. But dimensions and file size are separate things. If you need to hit a specific file size in kilobytes rather than specific dimensions, use the compression tool instead.
Why does my image look the same size on screen after resizing?
Browsers and image viewers scale pictures to fit the window, so a 4000px and a 800px image can appear identical on screen. Check the reported pixel dimensions rather than the on-screen size.
Is my photo uploaded anywhere?
Every step happens inside your browser tab using Canvas and WebAssembly. The file is never uploaded, so there is no server copy to delete and no account to create.

Worth knowing

Resizing re-encodes the image, so saving a JPEG repeatedly through several rounds of editing will slowly degrade it. Work from the original file where you can, rather than from a file you already resized.