When this tool helps
- Create a correctly sized website image
- Reduce dimensions before compression
- Prepare a fixed-size upload while keeping the source local
IMAGE TOOLS
Resize Image Online
Resize an image to exact width and height in pixels.
Processed locally. Your image is never uploaded.
PRACTICAL GUIDE
How to use Image Resize
Last reviewed
Resize an image to exact pixel dimensions in the browser. Resizing changes the pixel grid; it is different from compression, which primarily changes how those pixels are encoded.
How to use it
- Select an image
- Enter the target width and height
- Resize and inspect the preview
- Download the result and retain the original
Half-size export
- Input
- A 2400 x 1600 image resized to 1200 px wide
- Result
- 1200 x 800 when the original ratio is preserved
Halving both dimensions produces one quarter of the original pixel count.
Formula: when aspect ratio is preserved: target height = source height x target width / source width
Limits and assumptions
- Upscaling cannot recreate missing detail
- Exact width and height can distort an image when ratios differ
- Decoded images are limited by browser memory
Frequently asked questions
Does resizing reduce file size?
Usually, because fewer pixels are encoded, but format and quality also affect the final bytes.
Can I make a small image sharper by enlarging it?
No. Enlargement interpolates pixels but does not recover original detail.
Where is my image processed?
The browser decodes, draws and exports it locally.