How to resize an image
- Drop a photo on the box above or click to choose one. Its current size in pixels is shown.
- Type the width or height you need. With the aspect ratio locked, the other side is calculated for you. You can also enter a percentage or use the 50% and 25% shortcuts.
- Pick an output format if you want a different one, press Resize image, then download the result.
Pixels, proportions and quality
A digital image is a grid of pixels. Resizing builds a new grid and calculates each new pixel from its neighbours using high-quality smoothing. Making an image smaller is safe and keeps it sharp. Making it larger spreads the same information over more pixels, so edges soften.
Unlock the aspect ratio only when you need exact dimensions and accept some stretching. If a form demands, say, 600 × 600 pixels from a rectangular photo, crop it to a square first for a natural result.
Common sizes
- Full HD screen: 1920 × 1080 pixels
- Typical website content image: 1200–1600 pixels wide
- Square profile picture: 400 × 400 to 1080 × 1080 pixels
- Print at 300 dpi: multiply the size in inches by 300 (a 4 × 6 inch print needs 1200 × 1800 pixels)