SizeSpec

Crop vs resize: what is the difference?

Updated · 2 min read

Short answer

Cropping removes parts of the picture, so the shape and framing change. Resizing scales the whole picture to new pixel dimensions and keeps everything in it. To get an exact size and shape, you usually crop first and then resize.

The difference side by side

  • What it does

    Crop
    Cuts away edges
    Resize
    Scales the whole picture
  • What you lose

    Crop
    The cut-away parts
    Resize
    Nothing, if the ratio stays the same
  • Shape (aspect ratio)

    Crop
    Can change
    Resize
    Stays the same, or stretches if you force it
  • Pixel size

    Crop
    Gets smaller by the removed area
    Resize
    Becomes exactly the size you set
  • Use it to

    Crop
    Reframe, remove clutter, fit a shape
    Resize
    Fit a size limit or a display size
Crop compared with resize
CropResize
What it doesCuts away edgesScales the whole picture
What you loseThe cut-away partsNothing, if the ratio stays the same
Shape (aspect ratio)Can changeStays the same, or stretches if you force it
Pixel sizeGets smaller by the removed areaBecomes exactly the size you set
Use it toReframe, remove clutter, fit a shapeFit a size limit or a display size

When to use which

  • Crop when the photo has the wrong shape or too much empty space, for example a wide photo that must be square.
  • Resize when the shape is right but the picture is too big, for example to meet a size or upload limit.
  • Both when you need an exact size and shape. Crop to the ratio, then resize to the pixels. See how to crop a photo to a specific size.

Why the order matters

Crop first, on the biggest original. That keeps the most detail in the part you keep. If you shrink first and crop afterwards, you may end up with a crop that has too few pixels and has to be enlarged, which looks soft.

Do not stretch

If a resize tool lets you set width and height separately and the ratio does not match, it stretches the picture. Faces and products look squashed or tall. Keep the aspect ratio locked, or crop to the target ratio first.

Frequently asked questions

Does resizing a photo crop it?
No. Resizing keeps the whole picture and only changes its pixel size. Some tools offer a fill mode that resizes and crops in one step, so read the option names.
Does cropping make the file smaller?
Usually, because there are fewer pixels to store. Resizing to fewer pixels does too. See does cropping reduce image quality.
Which should I do first?
Crop first, then resize. This keeps the most detail.

Selling online? Do a whole batch at once

SizeSpec crops and resizes a batch of product photos to the size each marketplace asks for and gives you one ZIP. It crops from the centre or pads the image on white, and it works in your browser, so your files are never uploaded. It does not offer free-hand cropping of a single picture.

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