Zoom

Magnify a region of an image before cropping or resizing using the z_ parameter.

Magnify a region of an image with the z_ parameter. Zoom is applied before other transformations, so it changes the effective crop area you then resize or crop.

z_ accepts a factor from 1.0 (original) to 5.0 (maximum magnification). Values above 1.0 zoom in. Pair zoom with a crop mode so the magnified image still lands on your target dimensions.

How does it work?

You add z_{factor} to the transform segment. Autorender magnifies the image around its center — or a position you choose — and then applies the rest of the transforms in the URL. Because zoom runs first, c_crop or c_fill acts on the zoomed frame.

Original (z_1)

https://assets.autorender.io/LOKVTtKVGb/doc1/coffee_cup.jpg

Zoom 1x (z_1)

https://assets.autorender.io/LOKVTtKVGb/z_1,w_360,h_360,c_crop/doc1/coffee_cup.jpg

Zoom 3x (z_3)

https://assets.autorender.io/LOKVTtKVGb/z_3,w_360,h_360,c_crop/doc1/coffee_cup.jpg

The examples above crop to 360×360 px (w_360,h_360) after zooming.

Factor	Description
1.0	Original, no zoom
1.5	Moderate zoom, suited to product close-ups
2.0	Strong zoom for fine details
3.0	Strong zoom, use with a high-resolution source
5.0	Maximum magnification

A zoom factor above 2.0 on a low-resolution source degrades the output, because there are not enough source pixels to fill the magnified frame. Start from a high-resolution source for factors above 2.0.

How to control where the zoom focuses?

Combine z_ with the position parameter p_ to move the zoom focal point away from center.

Position	Description
p_c	Center (default)
p_t	Top center
p_b	Bottom center
p_tl	Top-left
p_br	Bottom-right

Focus top (p_t)

https://assets.autorender.io/LOKVTtKVGb/z_3,w_360,h_360,c_crop,p_t/doc1/coffee_cup.jpg

Focus bottom (p_b)

https://assets.autorender.io/LOKVTtKVGb/z_3,w_360,h_360,c_crop,p_b/doc1/coffee_cup.jpg

For hero images, use a subtle zoom in the 1.1–1.3 range to draw the eye to the subject without visibly cropping the frame.

Next steps

Crop

Pair zoom with c_crop or c_fill to hold your target dimensions.

Resize and aspect ratio

Set the width and height the zoomed image renders at.

Automatic format

Serve WebP or AVIF with f_auto to hold quality on magnified detail.

Recipes

Save zoom combinations as reusable t_ tokens.