Exact pixel dimensions are a constant requirement online: a profile picture must be a certain size, a thumbnail has to fit a grid, a banner needs specific proportions, and an upload form rejects anything too large. The Resize Image tool scales your picture to the width and height you specify, with an optional aspect-ratio lock so it never ends up stretched or squashed.
How to use the Resize Image tool
- Upload the image you want to resize.
- Enter a new width and/or height in pixels.
- Keep the aspect-ratio lock on to scale proportionally.
- Click Resize and download the result.
Down-scaling versus up-scaling
It helps to know which direction you are going. Making an image smaller is essentially free in terms of perceived quality — you are discarding pixels you no longer need, and the result looks clean. Making an image larger is a different story: there is no hidden detail to recover, so the tool can only stretch the pixels it has, and the picture will look softer. For best results, always start from the largest, sharpest version you have and scale down to the size you need.
Tips for sharp results
- Leave the ratio locked unless you genuinely need to distort the image.
- Resize down, not up, whenever the quality matters.
- Match the exact dimensions a platform asks for to avoid its own cropping.
- Resize before compressing for the smallest possible final file.
All scaling is performed on a local canvas, so your image is never uploaded. It is the quick, private way to hit any size requirement without installing photo software.
Quick reference
| Property | Detail |
|---|---|
| Input | JPG, PNG, WEBP |
| Controls | Width, height, aspect lock |
| Output | PNG |
| Best direction | Down-scaling |
| Upload | None |