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Resize an image
Change the width and height of images in pixels, centimetres, millimetres or inches. Resize one image or a whole batch.
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How to resize
- Choose or drop your images.
- Enter a width. Leave the height empty to keep the original proportions, or enter both to set an exact size.
- Choose the unit. For cm, mm and inches, pick the print resolution (300 DPI is standard for printing).
- Select Resize images and download.
Pixels or centimetres?
Screens care about pixels. Paper cares about physical size. When a form asks for a photo “3.5 × 4.5 cm”, it usually means the pixel size that prints at that size at a given resolution. At 300 DPI that is 413 × 531 pixels, which is what this tool calculates for you.
Entering both width and height
If the proportions you type differ from the photo's, the image is stretched to fit. To crop instead of stretching, use the photo and signature resizer, which crops to fill the exact size.
Common sizes
| Use | Size |
|---|---|
| Passport photo, India, UK and EU | 3.5 × 4.5 cm (413 × 531 px at 300 DPI) |
| US passport photo | 2 × 2 in (600 × 600 px at 300 DPI) |
| Website hero or banner | 1920 px wide |
| Blog or article image | 1200 px wide |
| Instagram square post | 1080 × 1080 px |
| YouTube thumbnail | 1280 × 720 px |
Resizing and file size
Halving the width and height leaves a quarter of the pixels, which usually cuts the file size by about three quarters. If you need both a pixel size and a KB limit, resize here first, then use the image compressor. For forms that specify both, the photo and signature resizer does it in one step.
Troubleshooting
- The image looks stretched: you entered both width and height in a different ratio from the photo. Leave one empty to keep proportions.
- Printed size is wrong: print at 100% or actual size, not fit to page.
Questions
Is anything uploaded?
Your files never leave your device. The conversion runs inside your browser, so nothing is uploaded to a server and there are no daily limits.
Can I make an image bigger?
Yes, but enlarging cannot add real detail, so large increases look soft.
How do I reach a file size limit too?
Resize first, then use the image compressor with the KB limit you need.