Vector vs Raster Graphics: What's the Difference and When to Use Each

Published July 8, 2026 · By the PixelPalette team

Every image you have ever seen on a screen or in print is built one of two fundamentally different ways: as a grid of colored dots, or as a set of mathematical instructions for shapes. Confusing the two is one of the most common and most costly mistakes a beginner can make — it is the difference between a logo that looks crisp on a business card and on a billboard, and one that looks fine on a business card but turns into a blurry mess the moment someone tries to print it larger.

What raster graphics actually are

A raster image (also called a bitmap) is a fixed grid of individual colored squares called pixels — short for "picture elements." Zoom in far enough on any raster image and you will eventually see the individual squares, each holding one solid color, arranged like tiles in a mosaic. Every photograph is a raster image, because photography captures continuous real-world light as a grid of discrete color samples. JPEG, PNG, GIF, and WebP are all raster formats.

The defining limitation of raster graphics is that the pixel grid is fixed at creation. Scale a raster image up beyond its native pixel dimensions and the software has to invent new pixels by interpolating — guessing — between existing ones, which produces the soft, blurry, or blocky look anyone who has stretched a small image will recognize immediately. Scale it down and you are fine, because you are discarding detail you already had, not inventing detail you do not.

What vector graphics actually are

A vector image contains no pixel grid at all. Instead, it stores mathematical descriptions of shapes: a circle defined by a center point and radius, a curve defined by anchor points and control handles, a fill color applied to the resulting path. When a vector image needs to be displayed, the software calculates and draws it fresh, at whatever size is requested, every single time. This is why a vector logo looks exactly as crisp at 16 pixels on a browser tab as it does printed forty feet tall on the side of a building — it is never actually "stretched," it is redrawn from scratch at the new size.

SVG is the standard vector format for the web; AI (Adobe Illustrator), EPS, and PDF are common vector formats for print and design production. Vector files are built in software like Adobe Illustrator, Affinity Designer, or Figma's vector tools, using pen tools, shape tools, and anchor points rather than a paintbrush.

The core trade-off, side by side

Why photographs can never be vector

This is a question that trips up a lot of beginners: why not just make everything vector, since it scales perfectly? The answer is that vector graphics are only efficient for content made of definable shapes and flat or gradient fills. A photograph contains near-infinite, non-repeating variation in color and tone across millions of individual points — there is no small set of mathematical shapes that can describe a photo of a forest or a face accurately. Software can technically trace a photo into vector shapes, but the result is either a heavily stylized illustration (losing the photographic detail entirely) or a vector file so complex it is larger and slower than just using a raster format in the first place. Photography is, and will likely always be, raster's job.

Why logos should almost always be vector

A logo has to work at wildly different sizes: a 16-pixel browser favicon, a business card, a website header, a trade show banner, the side of a delivery van. No single raster file can serve all of those sizes well — you would either need a blurry small version scaled up, or an unnecessarily huge file for the smallest use. A vector logo sidesteps the entire problem, because one file scales perfectly to every size it will ever need. This is why professional designers always deliver a finished logo as a vector file (typically SVG, AI, or EPS), alongside raster exports (PNG, JPEG) generated from it for convenience in contexts that require raster files. If you only ever receive a raster logo from a designer, ask for the vector source — you may need it later for large-format printing, and recreating a logo from a low-resolution PNG is a frustrating, imprecise process. For more on getting a logo right from the start, see our logo design fundamentals guide.

How to tell which type of file you are looking at

• Check the file extension. .jpg, .jpeg, .png, .gif, .webp, .bmp, and .tiff are raster. .svg, .ai, and .eps are vector. .pdf can technically contain either or both, so it is not a reliable indicator on its own.
• Zoom in dramatically. If edges get soft, blurry, or blocky as you zoom, it is raster. If edges stay perfectly crisp no matter how far you zoom, it is vector (or you are viewing a vector file rendered at a very high resolution).
• Try opening it in a vector tool. If Illustrator or a similar tool shows individually selectable, editable shapes and paths, it is vector. If it shows one flat, uneditable image, it is raster — even if the file extension is .pdf or .eps.

Converting between the two

Raster to vector ("vectorizing" or "tracing") is possible using automated tools like Adobe Illustrator's Image Trace, but it works best on simple, high-contrast source images — a black-and-white logo sketch, for example — and requires manual cleanup for anything complex. It is not a reliable way to "upgrade" a low-quality raster logo into a crisp vector one; the software can only guess at shapes based on existing pixels, and the guess is only as good as the source image allows.

Vector to raster ("rasterizing") is simple and lossless in the sense that you control exactly what pixel dimensions you export at — every vector tool includes an export function that renders the vector shapes into a PNG, JPEG, or similar format at whatever size you specify. This is the normal, expected workflow: design in vector, export raster copies as needed for specific uses (a favicon, a social media profile picture, an email signature).

Practical rule of thumb

If it is a photograph, or contains photographic elements, it is raster — full stop. If it is a logo, icon, illustration, or anything built from clean, definable shapes that needs to work at more than one size, design it as vector and export raster copies as needed. Getting this decision right at the start of a project saves hours of frustration later, particularly the moment someone asks for "the logo, but bigger" and a raster-only file cannot deliver.

Real designs usually combine both

In practice, most finished design work is not purely one type or the other — it is a raster and vector hybrid. A magazine cover typically combines a raster photograph as the background with vector-drawn text and logo elements layered on top, each doing the job it is best suited for. A website might use vector SVG icons throughout its interface while displaying raster JPEG product photography in its galleries. Even a single Adobe Illustrator or Figma file often contains both: vector shapes for the interface chrome, and an embedded raster image for a photographic element, all within one working document. Understanding the distinction is less about forcing every project into one category and more about making the correct choice for each individual element within a project — vector where scalability and crispness matter, raster where photographic detail is the point.

File size behavior: a difference worth understanding

Raster file size scales with pixel dimensions and image complexity — a larger photo, or one with more fine detail and color variation, produces a larger file, regardless of what the image actually depicts. Vector file size scales instead with the number and complexity of shapes, largely independent of the size the image will ultimately be displayed or printed at. A vector logo with twenty simple anchor points remains a tiny file whether it is rendered at favicon size or printed on a building, because the underlying mathematical description never changes — only the final rendering step, done at display time, differs. This is part of why vector files are so efficient for icons and logos specifically: a whole set of interface icons, each built from simple geometric shapes, can collectively weigh less than a single medium-resolution photograph.