About Resize image
Resize image online for a website thumbnail, document illustration, or attachment. You can resize images while keeping aspect ratio, in which case width determines the resulting height. Turn the ratio lock off only when you intentionally need exact independent dimensions.
How to resize an image in pixels
- Select the images to resize.
- Enter width, choose whether to lock aspect ratio, and enter height if the ratio is unlocked.
- Select Process, inspect the new dimensions, and download the results.
A practical example
- Input
A 1600 by 1200 image; Width: 800; Lock aspect ratio: enabled.
- Result
An 800 by 600 image.
With the ratio locked, the source proportions determine height. Unlocking and entering 800 by 800 stretches this source into a square.
Supported input and limitations
- Output dimensions must stay within 12,000 pixels per edge and 48 megapixels. Browser memory may be more restrictive.
- Resizing is not AI upscaling. Enlarging an image cannot reconstruct detail absent from the source, and this tool does not set print DPI metadata.
Image batches accept up to 100 files and 100 MB total. Source images must be within 12,000 pixels per edge and 48 megapixels. Batch results include a ZIP download.
Processing happens on your device. Read about local processing and optional workspace recovery.
Frequently asked questions
How do I resize an image without stretching it?
Keep Lock aspect ratio enabled and set the required width. Height is calculated from the original proportions.
Is resizing an image the same as cropping it?
No. Resizing changes the dimensions of the full image. Cropping removes areas outside a selected rectangle; use Crop image for that task.