Resize Image

About

Image Upload

Select and upload an image file from your device

Dimension Adjustment

Set desired width and height in pixels or percentage

Aspect Ratio Lock

Maintain original aspect ratio while resizing

Format Selection

Choose to download the resized image as JPG or PNG

Preview

View original and resized image side-by-side

Download

Download the resized image with one click

Reference

Image resizing is the process of changing the dimensions of a digital image. This technique is useful for optimizing images for different displays, reducing file sizes for faster loading, or adjusting aspect ratios. Various algorithms like nearest neighbor, bilinear, and bicubic interpolation are used to calculate new pixel values when resizing. Factors such as resolution, compression, and aspect ratio impact the quality of the resized image. Proper image resizing can significantly improve website performance and user experience by optimizing images for specific use cases.

Calculation

This tool renders the image at new dimensions specified by the user, either in pixels or as a percentage of the original size. When aspect ratio lock is enabled, it automatically calculates the other dimension to maintain the original aspect ratio. The resizing process involves mapping the original image pixels to a new grid based on the specified dimensions, using interpolation methods to determine new pixel values for a smooth result.