TL;DR: In the SVG vs PNG choice, SVG is a vector format made of shapes and code, so it stays sharp at any size and is usually tiny for logos, icons and simple illustrations. PNG is a raster format made of pixels, with lossless compression and transparency, so it suits screenshots, detailed graphics and images with fine texture. Use SVG for flat artwork that has to scale, and PNG when the image is pixel-based or the platform won’t accept SVG (many social networks and email clients don’t).
SVG vs PNG is one of the most common file-format questions designers and site owners run into, especially when exporting a logo. Both support transparency, and both look fine on a screen at normal size. Under the hood, though, they work in completely different ways, and choosing the wrong one gives you blurry logos, bloated pages or files that won’t upload. Here is how each format works and when to use it.
What is an SVG file?
SVG stands for Scalable Vector Graphics. MDN Web Docs describes it as an XML-based markup language for two-dimensional vector graphics. An SVG doesn’t store pixels. It stores instructions such as “draw a circle here, fill it with this color, put this path there.” The browser or app draws those shapes at whatever size is needed, which is why an SVG logo looks just as crisp on a phone as on a 4K monitor.
Because an SVG is text, you can open one in a code editor, change a color by editing a value, style it with CSS, animate it, and compress it very well with gzip or Brotli on a web server. It is a W3C web standard, and every modern browser supports it.
What is a PNG file?
PNG stands for Portable Network Graphics. It is a raster format: a grid of pixels, each with a color value. The W3C PNG specification defines it as a lossless format, so saving doesn’t throw away detail the way JPG compression does. It also supports an alpha channel for smooth, partial transparency.
The catch is scale. A PNG has a fixed number of pixels. Enlarge a 200 x 200 px PNG logo to fill a banner and it turns soft or blocky. For more on that difference, see our explainer on vector vs raster.
SVG vs PNG: side-by-side comparison
| Feature | SVG | PNG |
|---|---|---|
| Type | Vector (XML code) | Raster (pixels) |
| Scaling | Sharp at any size | Blurs or pixelates when enlarged |
| File size | Very small for simple shapes, large for complex artwork | Grows with pixel dimensions and detail |
| Transparency | Yes | Yes (full alpha channel) |
| Best for | Logos, icons, simple illustrations, charts, UI graphics | Screenshots, detailed graphics, images with texture, photos needing lossless quality |
| Editable | Yes, in code or vector apps (Illustrator, Figma, Inkscape) | Only by editing pixels (Photoshop, GIMP) |
| CSS styling and animation | Yes, when inlined | No |
| Support | All modern browsers; limited on social platforms and in email | Almost everywhere |
| Security | Can contain scripts, so untrusted files need sanitizing | Image data only |
When to use SVG
- Logos and brand marks. One SVG covers your favicon, header and print-ready artwork without separate exports.
- Icons and UI elements. SVG icons stay sharp on high-density screens and can switch color with CSS for hover states or accessible contrast.
- Charts, diagrams and simple illustrations. Flat shapes and lines compress very well as vectors.
- Animations. Inline SVG can be animated with CSS or JavaScript, with no need for a GIF or video.
When to use PNG
- Screenshots. Interfaces, text and sharp edges stay clean with lossless compression.
- Detailed or textured artwork. Painted illustrations, gradients with noise, or anything photographic would make a huge, slow SVG.
- Places that don’t accept SVG. Many social networks, marketplaces and email clients only take raster images. Export a PNG at the exact size you need.
- Transparent images over photos. PNG’s alpha channel handles soft shadows and anti-aliased edges reliably.
For photos with no transparency, neither format is usually the best choice. JPG or WebP files are much smaller. Our PNG vs JPG guide explains that trade-off.
SVG vs PNG for logos and websites
For a website logo, SVG is usually the better default. It is one small file, looks sharp on every screen and can be styled. Keep a PNG version too, for social profiles, email signatures, documents and any platform that rejects SVG. A practical brand kit usually includes:
- A master SVG (and the source vector file).
- PNG exports with transparent backgrounds at common sizes, such as 512 px and 1024 px wide.
- A square PNG or ICO for favicons and app icons where required.
For print, vector formats (SVG, PDF or EPS) are preferred because the printer can output them at any resolution. If you have to send a PNG, export it at the size it will print at 300 PPI. Our DPI vs PPI guide shows the math, and RGB vs CMYK covers color for print.
Is SVG safe?
An SVG is a document, and it can contain JavaScript and links to outside resources. Browsers block scripts when an SVG is loaded through an <img> tag, but an SVG opened directly or inlined into a page can run code. That is why WordPress doesn’t allow SVG uploads by default. If you accept SVGs from users or download them from unknown sources, run them through a sanitizer (or a plugin that sanitizes uploads) before using them. PNG files contain only image data, so they don’t carry this risk in the same way.
How to convert between SVG and PNG
- SVG to PNG: open the SVG in Figma, Illustrator, Inkscape or a browser and export or screenshot it at the size you need. Because the source is a vector, you can export at any resolution without losing quality.
- PNG to SVG: this needs tracing (vectorizing), for example with Inkscape’s Trace Bitmap or Illustrator’s Image Trace. It works well for simple, high-contrast logos and poorly for photos. Saving a PNG “as SVG” without tracing just wraps the pixels in an SVG file and gives you none of the benefits.
Bottom line
Choose SVG when the artwork is made of shapes and has to scale: logos, icons, charts and UI. Choose PNG when the image is made of pixels or has to work everywhere: screenshots, detailed graphics and social uploads. Most brands need both, a master SVG plus a set of PNG exports. If you are building a full visual system, our guide to design systems is a good next read.
Sources
- MDN Web Docs: SVG (Scalable Vector Graphics)
- MDN Web Docs: Image file type and format guide
- W3C: Portable Network Graphics (PNG) Specification
- W3C: Scalable Vector Graphics (SVG) 2
- Inkscape: Tracing bitmaps tutorial
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