Resize Image
Resize images to exact pixel dimensions. Aspect ratio and original format preserved; downscaling typically cuts file size by 80% or more.
Drag files here or click to upload (multiple files supported)
Ctrl+V to paste from clipboard
How to resize an image
- 1Drag, click, or paste to upload an image file (JPG, PNG, WebP, AVIF, GIF, SVG, and more).
- 2Enter a target width or height in pixels; the other dimension is calculated proportionally.
- 3Click 'Convert Now' and wait for the conversion to complete.
- 4Download the resized image in its original format.
About image resizing
The total number of pixels determines the base file size of an image. When the edge length of an image is halved, the total number of pixels becomes approximately one quarter of the original, and the file size also drops to approximately one quarter of the original. In web performance budgeting, image dimensions are the primary factor affecting loading performance.
This tool uses fit-inside proportional scaling mode, and only performs downscaling on images, it will not enlarge the original image. After the user enters the target size for any one edge, the other edge is automatically calculated according to the aspect ratio of the original image. Scaling and resampling are performed based on the Sharp engine.
This tool is suitable for scenarios such as adjusting the size of above-the-fold web images, meeting the image upload size limits of emails and forms, and generating content thumbnails. Enlarging a low-resolution image cannot add new detail to the original image, it only increases the canvas size.
FAQ about Resize Image
Does image quality change after scaling?
Image quality does not degrade noticeably when the image is downscaled appropriately. This tool performs resampling and scaling based on the Sharp engine, and the processing follows general image processing standards to meet common usage requirements.
Does scaling change the image aspect ratio?
It does not change the aspect ratio of the original image, and uses fit-inside proportional processing. This tool only supports downscaling images and does not provide image upscaling functionality. The size of the unspecified edge is automatically adjusted proportionally.
What is the single file size limit?
This tool processes only one file at a time, with a maximum single upload size of 50MB. It supports upload and processing of multiple common image formats including JPG, PNG, and WebP.
Are files stored?
Files are uploaded to the server via HTTPS for conversion. After conversion is complete, the server immediately deletes the source file and output file, and does not store any uploaded or generated files.