# Image Resizer

> Free online image resizer. Resize photos to exact width and height in pixels, keep or unlock the aspect ratio, and download as JPG, PNG, or WebP. Nothing is uploaded.

Resize images to exact pixel dimensions. Free, no sign-up, files never leave your device.

*Interactive tool: enter your values at https://toollantern.win/image-resizer/ and results update instantly in your browser.*

## What it does

Type the target width and height in pixels. With the aspect ratio lock on, changing one side adjusts the other automatically so the image never stretches. Turn the lock off to force exact dimensions.

## Common uses

Thumbnails at 300 pixels wide, social banners at 1200 by 630, avatars at 512 by 512, and hero images sized for fast page loads.

## Private by design

Resizing happens in your browser with the canvas API. Your files never leave your device.

## Frequently asked questions
### Does resizing keep the aspect ratio?

Yes, by default. The lock checkbox keeps width and height proportional. Uncheck it to force exact, possibly stretched dimensions.

### Will the resized image lose quality?

Downscaling is high quality. Upscaling a small image to a much larger size will look soft, since no detail can be invented.

### Are my photos uploaded anywhere?

No. Everything happens locally in your browser.

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Interactive version: https://toollantern.win/image-resizer/