Does it crop the SVG?

No. This first version adds or reports the viewBox only.

What if width and height are missing?

It falls back to a 100 by 100 viewBox.

Visual cropping and bbox-based adjustment are later tools.

Edit

Inspect an SVG viewBox and create one from width and height when it is missing.

Inspect an SVG viewBox and create one from width and height when it is missing.

Choose an SVG file, paste SVG markup, or load the sample to begin.

Page context

SVG ViewBox Adjuster inspects the SVG viewBox and creates a default one from width and height when missing.

The viewBox defines the internal SVG coordinate system. Without it, responsive scaling and editing are harder.

If no viewBox exists, the tool creates `0 0 width height` from numeric width and height values.