What Image Resizer does
Image Resizer changes the width and height of a picture. Enter the size you want in pixels, or scale by a percentage, keep the proportions locked so nothing is stretched, and download the result as JPG, PNG or WebP.
How to resize an image
- Add your image. Its current dimensions are shown.
- Choose to resize by pixels or by percentage.
- Type the new width or height. With Keep proportions ticked, the other value is filled in for you.
- Choose the output format and, for JPG or WebP, the quality.
- Press Resize image and download.
Pixels or percentage?
| Method | Use it when |
|---|---|
| Pixels | A website, form or template asks for exact dimensions, such as 1200 × 630 or 200 × 230 |
| Percentage | You simply want the picture smaller — 50% halves the width and height and cuts the pixel count to a quarter |
When the shape has to change
Suppose a form wants 300 × 300 pixels and your photo is 4000 × 3000. Unticking “Keep proportions” and typing 300 × 300 would squash the picture. Instead:
- Cut the photo to the right shape with Image Cropper — square, in this case.
- Resize the cropped picture to 300 × 300 here.
Common sizes
| Purpose | Typical size in pixels |
|---|---|
| Full HD screen or slide | 1920 × 1080 |
| Social media link preview | 1200 × 630 |
| Square profile picture | 400 × 400 to 1080 × 1080 |
| Image for an e-mail | 600–1200 wide |
| Web page content image | 800–1600 wide |
Sizes recommended by individual platforms change from time to time; check the platform's current guidance when exact dimensions matter.
Smaller is safe, larger is limited
Making an image smaller keeps it sharp. Enlarging cannot create detail that was never captured, so an enlarged picture looks soft, and the tool warns you when the new size is bigger than the original. If you need a larger image, go back to the highest-resolution original you have.
Converting between centimetres and pixels
Pixels have no fixed physical size; that depends on print resolution. At 300 dpi, commonly used for printing, 1 cm is about 118 pixels, so 3.5 × 4.5 cm is about 413 × 531 pixels. At 200 dpi it is about 276 × 354. If a form gives centimetres and a dpi value, multiply centimetres by dpi and divide by 2.54. Photo & Signature Resizer does this calculation for you.
Use cases
- Meeting the pixel dimensions required by an application portal.
- Shrinking large camera photos for a website so pages load quickly.
- Preparing images for presentations, documents and e-mail.
- Making thumbnails.
Related tools
- A file-size target in KB: Compress Image to KB.
- A smaller file at the same dimensions: Image Compressor.
- A different format only: Image Converter.
Privacy
The image is resized in your browser on your own device. It is not uploaded to our server.
