How to resize an image
Resizing an image changes its pixel dimensions — its width and height — which is different from compressing it. You can set an exact target size in pixels (for example 1920 pixels wide) or scale the image by a percentage. Making an image smaller re-samples it down cleanly and shrinks the file; making it larger stretches the existing pixels and cannot add detail the original never captured, so enlarged images look soft. This tool detects your image's format automatically and resizes it entirely in your browser.
This image resizer runs entirely in your browser. Drop in a image file, enter a new width or height in pixels or a percentage, and download the resized version — no uploads, no sign-up, and no watermark.
How to use it
1. Drop your image onto the drop zone or click to browse.
2. Enter a target width or height in pixels, or resize by a percentage.
3. Keep aspect ratio locked so the image scales proportionally instead of stretching.
4. Download the resized image. Everything is processed on your device.
Choosing the right dimensions
Choose dimensions that match where the image will be used: about 1920px wide is ideal for full-width web images, 1080px for social posts, and 600–800px for email or inline blog images. Keep aspect ratio locked so the image scales proportionally instead of stretching. If you only need a smaller file rather than smaller dimensions, use the compress tool instead.
Common web targets are 1920px wide for large hero images, 1080px for social media posts, and 600–800px for images placed inside articles or email. When in doubt, size to the widest space the image will fill and let the layout scale it down.
Common mistakes to avoid
A few habits quietly ruin resized images:
- Enlarging a small image and expecting it to look sharp — upscaling cannot add detail, so it always looks soft. - Unlocking aspect ratio and typing mismatched width and height, which stretches or squashes the picture. - Resizing repeatedly from already-resized copies instead of going back to the largest original each time. - Confusing dimensions with file size — if you need a specific number of kilobytes, resize first, then compress.
Frequently asked questions
Can I make an image larger without losing quality?
Not really. Enlarging (upscaling) an image asks the tool to invent pixels that were never captured, so the result looks soft or blurry no matter how it is done. For the sharpest result, start from the highest-resolution original you have and resize down. AI upscalers can guess at detail but still cannot recover true information.
How do I resize an image to a specific size in KB?
Resizing controls the pixel dimensions, not the exact file size in kilobytes. Smaller dimensions do produce a smaller file, but to hit a precise KB target you should resize to sensible dimensions first and then use the compress tool, where a quality slider lets you dial the file size up or down.
What is the difference between resizing and cropping?
Resizing scales the whole image to new dimensions, keeping everything in frame but at a different size. Cropping cuts away the outer edges to change the framing or aspect ratio. Use resize to fit a pixel size, and crop when you want to remove parts of the image.
Does resizing change the aspect ratio?
Only if you want it to. With aspect ratio locked, changing the width updates the height automatically so the image scales proportionally and never looks stretched. Unlock it only when you deliberately need to force an image into different proportions.
Are my images uploaded to a server?
No. All resizing happens locally in your browser using the canvas engine — your images never leave your device, so it is safe to resize private or work images.
Is this tool free?
Yes — resizing images here is completely free, with no watermark, no account, and no limit on how many you process.