SVG Viewer Online — Preview, Zoom & ViewBox Inspector

Preview SVG markup on light, dark or grid backgrounds, then inspect width, height and viewBox without leaving your browser.

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SVG viewer — preview & inspection playbook
Preview pasted SVG markup before shipping it, compare readability on different backgrounds, and inspect viewBox sizing issues without opening a design tool.

Developer notes

• Best used as a quick visual check before optimize, resize or JSX conversion. • Grid mode helps detect unwanted transparent padding. • Width, height and viewBox are read directly from the root <svg>. • V1 focuses on preview and inspection, not advanced pan/export workflows.

When teams pick this route

• Preview a design-handoff SVG before embedding it in code. • Check whether an icon disappears on dark backgrounds. • Confirm width/height/viewBox values before responsive fixes. • Spot transparent margins around marketing badges and logos.

Worked examples

FastMinify logo preview on light and dark backgrounds

Sample input

<svg width="480" height="144" viewBox="0 0 480 144" xmlns="http://www.w3.org/2000/svg"><rect width="480" height="144" rx="36" fill="#f97316"/></svg>

Output

The viewer fits the full logo at 100% zoom, then lets you zoom in and pan when the artwork overflows the preview area.

Quick viewBox sanity check

Sample input

<svg width="480" height="144"><rect width="480" height="144" rx="36" fill="#f97316"/></svg>

Output

A missing viewBox is immediately visible in the inspection panel, which helps decide whether resize-svg should add one.

Navigate related SVG tools

Need to fix scaling next? Open resize SVG. Want a lighter asset? Use optimize SVG or browse the SVG tools hub.

SVG viewer FAQ

Preview and inspect locally

Does it edit the SVG?

No — the viewer is for preview and inspection. Use resize-svg or optimize-svg when you want to change the markup.

Why switch backgrounds?

It helps catch low-contrast artwork, transparent padding, and icons that only look correct on one theme.

Is my SVG uploaded?

Never. Rendering and inspection happen locally in your browser.

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