Change image dimensions with control
Resize Image creates a JPEG, PNG, or WebP copy at the width and height you choose. You can lock the aspect ratio, prevent accidental enlargement, and compare the source with the resized result before downloading.
Width, height, and aspect ratio
With Maintain aspect ratio enabled, changing one dimension updates the other so the image keeps its original proportions. Turn it off only when you intentionally want a different shape; otherwise the result can look stretched or squeezed.
Do not enlarge prevents the width or height from exceeding the original image dimensions. Enlarging can be useful for a required canvas size, but it cannot restore detail that was not present in the original.
How to resize an image
Choose an image
Add a static JPEG, PNG, or WebP file. Its verified dimensions become the starting width and height.
Set the dimensions
Enter the target width or height and decide whether to keep the aspect ratio or allow enlargement.
Choose the output
Select JPEG, PNG, or WebP. Quality applies to JPEG and WebP; PNG ignores the quality setting.
Compare and download
Resize the image, inspect the before-and-after view, and download the result when its dimensions and appearance are correct.
If the dimensions are already right and you mainly want a smaller file, use the Compress Image.
File size and compatibility
Smaller dimensions often reduce file size, but the result also depends on format, quality, transparency, and source encoding. A resized PNG can still be larger than a source JPEG, for example.
Files are limited to 25 MB, 10,000 pixels on either side, and 25 megapixels in total because decoded images require much more browser memory than their compressed file size suggests. The page also warns when detected metadata or a color profile will not be carried into the new copy.
How do I resize an image without stretching it?
Keep Maintain aspect ratio enabled. Enter one target dimension and the tool calculates the other from the source proportions.
Should I enlarge a small image?
Only when you need specific output dimensions. Enlargement adds pixels but does not recover missing detail, so the result may look soft.
Does resizing an image make the file smaller?
Often, but not always. Pixel dimensions, output format, quality, and source encoding all affect the final file size.
Can I keep a transparent background when resizing?
Yes with PNG or a transparency-capable WebP result. JPEG does not support transparency, so review the preview before choosing it.
Are images uploaded for resizing?
No. The selected image is inspected and resized in your browser after the page has loaded.