Quick answer

SVG stands for Scalable Vector Graphics. It describes shapes, paths, and text using XML-based markup, allowing suitable graphics to render cleanly at many sizes.

Original example

Scale a circle without enlarging pixels

An SVG circle defined by a center point and radius can be drawn at 24 pixels or 240 pixels wide from the same shape instructions. A small raster copy enlarged ten times instead exposes its fixed pixel grid.

Vector instructions, not a pixel grid

SVG stores drawing instructions rather than a fixed rectangular array of colored pixels. It suits icons, diagrams, and other graphics that can be expressed as shapes.

SVG can contain text, links, styles, and scripts, so untrusted SVG files require the same security care as other active web content.

Common misunderstandings

  • SVG is not automatically the best choice for detailed photographs.
  • Vector scalability does not remove the need for accessible labels or sensible complexity.

Related answers

Sources

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