SVG vs PNG vs JPG for icons — which is the best format?

The short answer

For icons and logos on websites there's a clear order: SVG > WebP > PNG > JPG. SVG is almost always the best choice — unless the icon is too complex or only available as a raster image. Then comes WebP, then PNG. JPG is almost never suitable for icons and logos.

SVG — the clear winner for icons

SVG (Scalable Vector Graphics) is the superior format for icons and logos:

• Scales losslessly to any size — perfectly sharp at 16px and at 512px
• Usually very small file size — simple icons often under 1 KB
• Animatable via CSS and JavaScript
• Theming possible — colors adjustable via CSS variable or currentColor
• Embeddable directly in HTML — no HTTP request needed
• Accessibility — title and desc attributes for screen readers

Where SVG hits limits

• Very complex illustrations with thousands of paths — SVG can then be larger than PNG
• Photorealistic icon design — not suited to SVG
• When SVG isn't available as a format (only raster images on hand)
• SVG from third-party sources can carry XSS risks (not as <img src> from user uploads)

PNG — the safe runner-up

When SVG isn't available, PNG is the first choice for icons:

• Transparency via alpha channel — usable on any background
• Lossless quality — sharp edges and colors without artifacts
• Universally compatible — in all apps, emails, documents

Main drawback: PNG scales up poorly. A 32×32px icon displayed at 64×64px on a retina display looks blurry. Fix: provide a 2× version (64×64px).

WebP — the modern alternative to PNG

WebP offers several advantages over PNG for icons and logos:

• Full alpha channel like PNG
• Smaller file size (lossless: ~26% smaller than PNG)
• Lossy possible — for slightly more detailed icons

Limitation: not usable in emails and with older software. For pure web use, WebP is almost always preferable to PNG.

JPG — unsuitable for icons

JPG has three fatal weaknesses for icons and logos:

• No transparency — logos on a transparent background impossible
• Compression artifacts — sharp edges and text become blurry and blocky
• Quality loss on re-saving — every edit degrades the quality

JPG was developed for photos — not for graphics. There's no sensible use of JPG for icons and logos.

Detailed comparison for icon use cases

Icon formats and dark mode

SVG offers the most elegant dark-mode solution: with currentColor in the path fills, the icon automatically takes on the text color — white in dark mode, black in light mode. No separate icon set needed.

With PNG and WebP you need either separate icon versions for dark and light mode, or you use CSS filters (filter: invert(1)) for single-color icons — which only works well for purely black/white icons.

File-size comparison: the same icon in different formats

SVG in practice: inline vs. external reference

SVG can be embedded in two ways:

• Inline (<svg>…</svg> directly in the HTML): no HTTP request, fully manipulable via CSS and JS, perfect for icons meant to be animated or colored
• As <img src="icon.svg">: a separate HTTP request, but cached; no JS access to the SVG content, simpler in markup

Conclusion

SVG is the clear first choice for icons and logos. Scalable, animatable, themeable, often smaller than raster formats. If no SVG is available: WebP for web use, PNG for universal compatibility. Using JPG for icons is a common mistake that leads to ugly artifacts and compatibility problems.