Images

Resize images

Set the actual width and height of an image file.

One image per job, up to 5 MiB, 8 megapixels and 4096 px per side; output up to 20 MiB. Static JPG, PNG and WebP only. Animations are not supported. EXIF orientation is applied; original EXIF metadata is not copied. The format must be supported by your browser. Images are neither uploaded nor saved; processing downloads software resources.

Select image

Options

The original format is kept. JPEG/WebP are re-encoded with loss (90% quality). With aspect ratio enabled, the other side is calculated and rounded to the nearest pixel.

Keep aspect ratio

Reference dimension

Width (px)

Height (px)

Allow upscaling (does not add detail)

JPEG background (for transparency)

Ready to select an image

What this tool does

Change the actual resolution of the downloaded image, preserving aspect ratio by default.

How to use it

Load a static image within the limits.
Set a reference width or height; choose aspect ratio and whether upscaling is allowed.
Process and check the downloaded file dimensions.

Verifiable example

Input: 800 × 600 image; output width 400 with aspect ratio enabled.
Expected result: 400 × 300 pixels.

Limitations to review

Upscaling cannot recover missing detail. Preview CSS size is different from file resolution.
Up to 5 MiB, 8 megapixels and 4096 pixels per side. EXIF orientation is applied; transparency depends on format.

Read the full tutorial

Related tools

Browse all guides. Local processing: the page downloads HTTP resources but does not send files or input data to a server for these functions.