SVG vs PNG: which image format should you use?

Quick answer

Choose SVG for logos, icons, diagrams, line art, and illustrations made from distinct shapes. Choose PNG for screenshots, textured artwork, and images with pixel-level detail. For photographs, JPEG, WebP, or AVIF will usually be more efficient than either format.

The core difference

PNG is a raster format: it stores a rectangular grid of colored pixels. SVG is a vector format: it describes geometry with XML elements such as paths, circles, rectangles, fills, and strokes.

That difference affects scaling. Enlarging a PNG eventually reveals pixels because the file has a fixed resolution. An SVG is redrawn from mathematical instructions at the requested size, so a well-made vector stays sharp on a small screen or a large sign.

When SVG is the better choice

SVG is usually best when the artwork has clear boundaries and a manageable number of colors. Typical examples include brand marks, interface icons, infographics, diagrams, flat illustrations, maps, charts, and cut paths.

SVG can also be styled or animated in a browser. Individual fills and strokes can respond to CSS, and meaningful text can remain searchable when it is stored as text rather than outlined paths.

A vector is easier to adapt. A designer can select one shape, change a color, adjust a curve, or remove a detail without repainting surrounding pixels.

When PNG is the better choice

PNG is a strong choice for lossless raster content and full alpha transparency. Use it for screenshots, pixel art, detailed textures, painted illustrations, and raster exports whose exact pixels must remain unchanged.

Trying to describe thousands of photographic color transitions as vector paths creates a large and difficult-to-edit SVG. The result may look posterized while still weighing more than the original image.

Web performance is not only about the extension

A simple icon can be dramatically smaller as an optimized SVG. A complex illustration can become larger than an equivalent PNG or WebP if it contains too many paths and coordinates.

Measure the real files. Optimize SVG metadata and numeric precision, then test rendering. For PNG, export at the actual display dimensions when possible and avoid shipping a huge source merely to show a small thumbnail.

Inline SVG can save a request and enables CSS styling, but it also increases the HTML document. Reused site-wide icons are often better served as external, cacheable files or as part of a controlled icon system.

Accessibility and security considerations

An informative image still needs an accessible name or adjacent text, regardless of format. Decorative images should be ignored by assistive technology.

SVG is active XML content and can contain links, styles, or scripts. Only accept trusted SVG files or sanitize user-provided markup before displaying it inline. PNG is not executable markup, which makes its rendering model simpler.

Which format should a logo use?

Keep a master logo as SVG when clean vector paths are available. Export PNG copies for systems that do not accept SVG, email signatures, or specific raster placements. This gives you one editable source and predictable fallbacks.

For a raster-only logo, convert the highest-resolution clean version, inspect letter counters and curves, and verify the result in a vector editor. Do not assume that changing a filename from .png to .svg creates vector paths.

Decision checklist

Use SVG when the artwork consists mainly of shapes, must scale to many sizes, needs editable paths, or will drive a cutting machine. Use PNG when the image relies on pixels, textures, exact screenshots, or detailed transparency.

Convert a raster logo with Image to SVG, or create a raster delivery file with the SVG to PNG converter.