SVG Viewer

How the SVG Viewer works — preview, inspect, and debug SVG code with live rendering.

Last updated: March 10, 2026 Try this tool

What It Does

The SVG Viewer lets you preview SVG code with live rendering. Paste SVG markup or drop an SVG file to see it rendered instantly, with support for animation playback, zoom controls, and multiple background modes (light, dark, checkerboard).

Key Features

  • Live preview — See SVG rendered as you type or paste
  • File drop support — Drop .svg files directly
  • Zoom & pan — Zoom in/out to inspect details
  • Background modes — White, dark, or checkerboard for transparency
  • Animation support — Play/pause CSS and SMIL animations
  • Dimensions display — Shows viewBox and rendered dimensions

Architecture

The SVG Viewer is one of the simpler tools — no WASM required. It uses the browser’s native SVG rendering engine with a thin validation and display layer.

Processing Pipeline

  1. Input — User pastes SVG code or drops a file. Files are read as text via FileReader.readAsText().
  2. Validation — The SVG markup is parsed and validated using DOMParser to check for well-formed XML.
  3. Rendering — Valid SVG is injected into an <iframe> sandbox for safe, isolated rendering.
  4. Controls — Background mode, zoom level, and animation state are managed by React state.

Code Structure

src/pages/tools/svg-viewer.astro   → Page with SEO
src/components/svg-viewer/
  SvgViewerTool.tsx                → Main React component
src/lib/svg.ts                     → SVG validation and parsing

Privacy & Security

SVG files can contain embedded scripts and external resource references. The viewer renders SVGs inside a sandboxed iframe to prevent script execution. All processing is local — your SVG code never leaves the browser.

Technical Details

  • No WASM required — Uses native browser SVG rendering
  • Supported features: Static SVG, CSS animations, SMIL animations
  • Sandboxed rendering: SVGs are displayed in an isolated iframe
  • Browser support: All modern browsers

FAQs

Can SVG files contain malicious code?

Yes — SVGs can contain JavaScript in <script> tags or event handlers. The viewer renders SVGs in a sandboxed iframe that blocks script execution, making it safe to preview untrusted SVGs.

Why does my SVG look different here vs. in my editor?

Different renderers may interpret SVG slightly differently, especially around font rendering and filter effects. The viewer uses your browser’s native SVG engine, which is the same engine that will render the SVG on the web.

Can I export the SVG as a PNG?

Not currently. For raster conversion, use the Image Converter tool which can convert SVG to PNG and other formats.