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Resize Image

To resize an image, add it, then type a new width or height in pixels or drag the percentage slider. The aspect ratio stays locked by default, so nothing is stretched. Shrinking keeps photos smooth; enlarging beyond about 150% starts to look soft, and the tool warns you when you do. The image is resized in your browser.

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Updated

How to use Resize Image

  1. 1Add an image — its current dimensions appear immediately.
  2. 2Type a new width or height, or drag the percentage slider.
  3. 3Leave the lock on to keep the proportions, or turn it off to set both freely.
  4. 4Download the resized image.

How it works

The image is drawn onto a canvas at the target size using the browser's built-in high-quality resampling, which averages neighbouring pixels rather than simply dropping them. That is what keeps a downsized photo smooth instead of jagged.

Making an image smaller is lossless in appearance — there is more information than you need, so removing some is safe. Making one larger cannot invent detail that was never captured, so enlarging past about 150% starts to look soft. When you scale up, the tool warns you.

With the aspect lock on, changing one dimension recalculates the other from the original ratio, so circles stay circular and faces are not squashed.

Images are decoded by the browser, redrawn on a canvas and re-encoded on your own machine. Nothing is uploaded, so there is no waiting on a queue and no copy of your photos anywhere else.

Tips and common mistakes

  • Keep the aspect ratio locked unless you really want the picture stretched.
  • Shrinking is safe; enlarging is not. Beyond about 150% an enlarged image starts to look soft, because no tool can add detail the camera never captured.
  • Resize before compressing. Halving both dimensions cuts the amount of data to about a quarter.
  • For printing to an exact physical size, use Change Image DPI, which works in inches or centimetres rather than pixels alone.

Frequently asked questions

Will resizing distort my image?
Not with the aspect ratio locked, which is the default. Unlocking it lets you set width and height independently, which will stretch the picture.
Can I make an image bigger without losing quality?
Not really. Enlarging interpolates between existing pixels; it cannot recover detail the camera never recorded. Up to about 150% looks acceptable, beyond that it softens.
What size should I use for the web?
1200–1600 pixels wide covers most full-width web images. Thumbnails rarely need more than 400. Matching the display size is the single biggest saving you can make.
Does resizing also reduce file size?
Yes, considerably — file size scales roughly with pixel count, so halving both dimensions cuts the data to about a quarter.
Can I resize by percentage instead of pixels?
Yes. Drag the percentage slider and the width and height update together.
A form wants exactly 600 × 600 pixels. How do I get that from a rectangular photo?
Crop it to a square first with Crop Image, then resize the square to 600 × 600. Resizing a rectangle to a square without cropping would stretch it.
Does resizing change the DPI?
DPI only matters for printing. Screens show pixels, so for on-screen use the pixel size is all that counts. To set a print size, use Change Image DPI.
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Guides

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Compress ImageCut image file size with a live before-and-after preview.Crop ImageDrag out a crop area or snap to a preset aspect ratio.Image ConverterConvert between JPG, PNG and WebP in a single batch.Rotate ImageRotate in 90° steps or flip horizontally and vertically.