Image Resizer

Change an image's dimensions by exact pixels or by percentage, with an optional lock to preserve the aspect ratio. All processing stays in your browser.

Drop an image here or click to browse

JPG, PNG or WebP

Your data is processed locally in your browser and is never uploaded to our server.

How to use image resizer

Upload an image
Drop or select the image you want to resize.
Set the new size
Enter a width, a height, or a percentage. Keep the lock on to hold proportions.
Download
Click Resize & download to save the new version.

Features

Pixels or percent

Resize to exact dimensions or scale down by a percentage.

Aspect-ratio lock

Automatically fills the matching dimension so images don't stretch.

Choose the output format

Export as PNG, JPEG or WebP.

Frequently asked questions

Will resizing reduce quality?

Scaling down is generally clean. Scaling up beyond the original size can look soft because there's no extra detail to add.

Does the aspect ratio lock work both ways?

Yes — change either width or height and the other updates to keep the image's proportions.

Is anything uploaded?

No. Resizing is done with the canvas API on your device.