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Resize images by pixels, percent or size

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1 min
  1. Open Resize. Choose it from the menu at imagetools.sanil.app.
  2. Choose how to resize. Use the Resize by setting.
  3. Set the size. The setting applies to every image you add.
  4. Add your images. Then download the results.

Resize by

Option Use it when
Pixels A form or website asks for an exact width and height
Percent You just want a smaller copy, for example 50
Longest side A batch mixes portrait and landscape and all must fit one limit
Social media size You want a ready size, such as Instagram post (1080 × 1350 px) or Instagram story (1080 × 1920 px)

Two options worth knowing

  • Keep aspect ratio is on by default, so changing the width changes the height too and the picture is never stretched. Turn it off to set both sides yourself.
  • Never enlarge leaves a picture that is already smaller than your size as it is. A small picture stretched bigger only looks blurry.

Social media sizes

The picture fits inside the size and nothing is cut off, so a picture with a different shape ends up shorter on one side. To fill a shape exactly, crop first. See Crop, rotate and flip images or Make several sizes from one image.

Resizing does not change the format. A JPG stays a JPG, and a PNG keeps its transparency.

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