You've probably spent too long debating this. You have a logo, or an icon, or an illustration, and you need to decide: save it as SVG or export as PNG? Both look fine on screen. Both can have transparent backgrounds. So what's the actual difference, and when does the wrong choice come back to bite you?
Here's the short answer: SVG is a description of shapes, PNG is a photograph of pixels. Everything else follows from that.
A PNG file is a grid of pixels. If you open a 200×200 PNG, you have exactly 40,000 pixels — each with a precise colour and an alpha (transparency) value. The file stores those pixels directly. When you scale the image up, the browser has to invent new pixels by interpolating between existing ones — and that's where blurriness happens.
An SVG file is completely different. It doesn't store pixels at all. Instead, it stores instructions: "draw a circle at (50, 50) with radius 30, filled with blue." The browser executes those instructions at whatever size the image is displayed. A 16px icon and a 1600px banner version of the same SVG file both come from the same source file — there are no extra pixels to invent.
SVG stands for Scalable Vector Graphics. The "scalable" part is the key — it isn't a description of pixels, it's a description of geometry. That distinction dictates almost every difference between the two formats.
If you're building a website and you have a logo, use SVG every single time. A PNG logo that looks fine on a standard display will be noticeably soft on any retina screen (2× density), because those screens are showing your 200px image at a CSS size of 100px — and the browser fills the missing pixel data by guessing. SVG has no such problem. The same file renders perfectly at any density.
The same logic applies to navigation icons, feature icons, social media icons, and any other small visual elements on a page. Use SVG.
If an image appears at multiple sizes — a logo in a header, a favicon in a browser tab, and a thumbnail in a social share — SVG serves all three from one file. With PNG you'd need a different export for each context to avoid visible blurriness.
Because SVG is XML, you can target SVG elements with CSS. You can change a logo's colour for dark mode with a few lines of CSS. You can animate a loader icon with a CSS keyframe. You can create icon button hover effects that change the SVG fill colour. None of that is possible with PNG — a PNG image's visual properties are baked in at export time.
SVGs can carry semantic meaning. You can add an aria-label or title element inside the SVG markup, and screen readers will read it aloud. A PNG <img> tag relies entirely on the alt attribute for accessibility — the image itself carries no structure.
Photos can't be represented as vector paths. A photograph is a dense grid of colour information — there are no geometric shapes to describe, just millions of pixels. Trying to store a photo as SVG would either be impossible or would result in a file that's orders of magnitude larger than the raster original.
PNG is one of the two sensible formats for raster images on the web (JPEG being the other). For photographs, JPEG is almost always the better choice because it compresses much more efficiently. But when you need a lossless photograph with a transparent background — like a product photo cut out from its background — PNG is what you use.
Screenshots are raster images by nature. UI mockups, browser screenshots, screencasts — these are all grids of pixels that exist at a fixed resolution. PNG preserves them exactly as-is with no compression artefacts. SVG isn't a relevant format here.
PNG is universally supported in every context where you might use an image: email clients, Word documents, PowerPoint, Canva, messaging apps, social media, legacy browsers, image editing software. SVG is not — most email clients strip or refuse to render SVG. WhatsApp and many other apps don't support it. Older graphics tools don't handle it well.
If you're delivering an image to someone and you don't know how they'll use it, PNG is the safe default.
| Property | SVG | PNG |
|---|---|---|
| Type | Vector (geometric shapes described in XML) | Raster (pixel grid) |
| Scaling | Perfect at any size SVG wins | Fixed resolution — blurry if scaled up |
| Transparency | Full alpha channel support | Full alpha channel support |
| Colour depth | Unlimited — CSS colours, gradients, blends | 24-bit colour + 8-bit alpha |
| Photos | Not suitable | Yes (lossless) PNG wins |
| File size — icons | Very small (bytes to low KB) SVG wins | Larger, especially at 2× for retina |
| File size — photos | N/A | Large — use JPEG/WebP for photos |
| CSS styling | Full CSS access to SVG elements SVG wins | Not possible |
| Animation | CSS and SMIL animation supported SVG wins | Static (no animation in PNG) |
| Email support | Poor — most clients block SVG | Universal support PNG wins |
| Indexability | Text content inside SVG is searchable SVG wins | No text content — relies on alt text |
| Accessibility | Can carry aria-label, title elements SVG wins | Relies on alt attribute only |
| Editable after export | Yes — it's plain text XML SVG wins | No — pixels only |
| Browser support | All modern browsers | Universal, including legacy PNG wins |
| Compression | Minification + gzip can be applied | LZ77 lossless compression |
For icons and simple graphics, SVG is almost always smaller. A common navigation icon (hamburger menu, search, arrow) as SVG might be 300–600 bytes. The equivalent PNG at 2× for retina (48×48) could easily be 2–5 KB. At a page with 20 icons, that difference adds up.
The calculus flips for complex images. A detailed illustration with many paths, gradients, and effects can produce SVG files that are 50–200 KB. The PNG equivalent at standard resolution might be 30–60 KB. In these cases, PNG wins on file size.
And for photos: JPEG or WebP will always win. A full-bleed photo as PNG might be 2–4 MB. The same photo as JPEG at comparable quality is 200–400 KB.
This is the most concrete reason to care about SVG vs PNG in 2026. Most modern phones and laptops use high-DPI displays — Apple's Retina, Android's AMOLED panels, Windows' HiDPI screens. These screens have a device pixel ratio of 2× or 3×, meaning they have two or three physical pixels for every CSS pixel.
When you load a PNG image and display it at 100×100 CSS pixels on a 2× Retina screen, the browser is actually drawing it at 200×200 physical pixels. If your PNG was only 100×100 pixels to begin with, the browser stretches it — and the result is a soft, blurry image.
To fix this with PNG, you have two options: serve a 2× (200×200) image for standard display, or use srcset to serve the right image for each screen density. Both approaches add complexity and double (or triple) your image download size.
With SVG, there's nothing to do. The browser renders the SVG at 200×200 physical pixels automatically, perfectly sharp, from the same file you'd use on a 1× screen. This is the core reason SVG has become the default format for icons and logos on modern websites.
SVG has been supported in all major browsers since 2013. Chrome, Firefox, Safari, Edge, and every mobile browser handle SVG natively. For typical website use, SVG support is effectively universal.
The exceptions are worth knowing:
Given everything above, there are specific scenarios where converting an SVG to PNG is the right move:
If you're building for the web and control the environment: use SVG for icons, logos, and UI graphics. If you're sending an image to someone else, uploading to a platform, or using it in email: export as PNG at 2× the display size. When in doubt about support, PNG is always safe.
Understanding the SVG vs PNG difference isn't about memorising a rule — it's about knowing what each format is. Vectors describe shapes. Rasters store pixels. Once that distinction is clear, the right choice in any situation becomes obvious.