What is the difference between dimensions and file size?

Dimensions are width and height in pixels. File size is the amount of stored data; both can change during resizing.

Can enlarging a small picture restore missing detail?

Ordinary resizing cannot recover detail absent from the source. Enlarged images may look blurred.

Use the tool's aspect-ratio controls where available and inspect the result before saving.

Resize Image processes the image locally. A separate optional Upload action sends the image to the server for temporary storage.

Change an image's dimensions using browser-based resizing. Set the output size, save the image and verify its width and height.

or click to browse files

Resize Images

JPGJPEGPNGGIFBMPWEBP

Maximum file size: 20MB

Fit an image to a form, document or layout that requires particular dimensions. Check the aspect ratio to avoid unintended stretching.

What is the difference between dimensions and file size?: Dimensions are width and height in pixels. File size is the amount of stored data; both can change during resizing.
Can enlarging a small picture restore missing detail?: Ordinary resizing cannot recover detail absent from the source. Enlarged images may look blurred.
How can I avoid stretching my image?: Use the tool's aspect-ratio controls where available and inspect the result before saving.
Where does Resize Image process my file?: Resize Image processes the image locally. A separate optional Upload action sends the image to the server for temporary storage.