Does resizing degrade quality?

Downscaling is lossless in terms of resolution but the new image has fewer pixels — fine detail is averaged. Upscaling adds pixels by interpolating; the result will look softer than the original. For AI-style upscaling, use a dedicated tool.

Why did my file get larger after resizing?

Browsers re-encode the image at default quality during canvas export. If you resized to nearly the same size as the original, the re-encode may be slightly larger. To shrink the file, use the compressor afterward.

Is the file uploaded?

No. The Canvas API does the resizing inside your browser. Nothing is sent over the network.

Files never leave your device

Resize Images Online

Resize images by pixel dimensions or percentage, with optional aspect-ratio lock. Pure browser, no quality loss to the cloud.

Drag and drop a file here

or click to browse

JPG, PNG, WebP

How to use Image Resizer

Drop or browse for an image.
Set a target width and height — toggle the lock to keep aspect ratio.
Or use percentage scaling for proportional resizing.
Preview the result, then download.

How to use Image Resizer

Frequently asked questions

Does resizing degrade quality?

Why did my file get larger after resizing?

Is the file uploaded?