SVG vs PNG: Which Format Should You Use?

SVG and PNG are both widely supported image formats, but they work very differently under the hood. Choosing the wrong format can mean blurry images on retina screens, unnecessarily large file sizes, or illustrations that can't be styled to match your brand. Here's everything you need to know.

The quick answer

What is SVG?

SVG stands for Scalable Vector Graphics. An SVG file is actually an XML text file that describes shapes, paths and colors mathematically. This means it can be drawn at any size without ever losing quality — the browser recalculates the image every time it's rendered.

What is PNG?

PNG (Portable Network Graphics) is a raster format — it stores a grid of pixels. If you enlarge a PNG beyond its original resolution, those pixels become visible and the image looks blurry. For sharp display on retina screens you need a PNG that's 2× or 3× the displayed size, which increases file size significantly.

SVG vs PNG: head-to-head comparison

Resolution & sharpness

SVG wins. SVG illustrations are perfectly sharp at every screen size, DPI and zoom level. PNG is pixel-based — sharp at its native resolution, blurry when enlarged. For a retina (2× DPI) display you need a 2× PNG, and for 3× displays a 3× PNG.

File size

SVG usually wins for illustrations. A typical flat illustration as SVG is 20–60 KB. The same illustration as a 2× PNG could be 200–600 KB. For complex photo-realistic images with millions of color variations, PNG is more efficient.

Browser support

Both are excellent in browsers. SVG has been supported in all major browsers since 2013. PNG support is universal. The difference is in email clients — many email clients, including older versions of Outlook, don't render SVG reliably. Always use PNG for email.

Styling and customisation

SVG wins. You can change SVG colors with CSS, target individual elements, add hover effects, and animate paths. A PNG is opaque — you can't change its colors without re-exporting from the source file. If you need to match illustrations to your brand colors, SVG is the only practical choice.

Animation

SVG wins. SVG elements can be animated with CSS or JavaScript. You can animate paths being drawn, elements fading in and out, or the whole illustration spinning. PNG images can't be animated (unlike GIF, but GIFs have severe color limitations).

Accessibility

SVG wins when used correctly. Inline SVGs can include <title> and <desc> elements with meaningful descriptions for screen readers. PNG images need an alt attribute on the <img> tag — which is easy to miss.

SEO

Similar, with a slight SVG advantage. Both formats are indexed by Google. SVG text content (like labels inside a chart) can be indexed as text. PNG text is invisible to search engines.

When to use PNG instead of SVG

Despite SVG's advantages for illustrations, there are clear situations where PNG is the better choice:

• Email — email clients have inconsistent SVG support; PNG is universally safe
• Social media — most platforms convert everything to JPEG/PNG anyway; upload PNG directly
• Complex photographic art — if an illustration has thousands of gradient stops and photorealistic shading, SVG file size can actually exceed PNG
• CMS or platform that strips SVG — some older CMS platforms block SVG uploads for security reasons

Converting between formats

If you have an SVG but need a PNG, our SVG to PNG tool exports at any resolution you specify. If you have a PNG illustration and want an editable vector version, try our Image to SVG converter.