Raster vs Vector Graphics: The Difference Explained
The difference between raster vs vector graphics comes down to how the image is stored: raster graphics are grids of colored pixels, while vector graphics are shapes defined by points, lines and curves. Raster suits photos and painted detail; vector suits logos, icons, type and anything that must scale or be cut. Knowing which one you have tells you how big you can print it, how you can edit it and which file format to send.
- Raster (pixels): JPG, PNG, WebP, GIF, BMP, TIFF, HEIC. Fixed resolution.
- Vector (paths): SVG, AI, EPS, PDF (when it contains vector artwork), DXF. Resolution-independent.
- Rasterizing (vector to raster) is easy and lossless at the chosen size. Vectorizing (raster to vector) means tracing, and results depend on the source image.
- A file extension does not always tell the whole story: a PDF or SVG can contain an embedded raster image.
How Raster Graphics Work
A raster graphic is a rectangular grid where every cell, or pixel, stores one color. A photo from a 12-megapixel camera is roughly 4000 × 3000 pixels, and that grid is all the information the file holds. Zoom in far enough and you see the individual squares.
Because the pixel count is fixed, a raster image has a maximum useful size. Displaying it smaller is fine; displaying it larger forces software to guess the missing pixels, which produces blur or visible stair-steps along diagonal edges. Raster file size grows with pixel dimensions and color depth, and most formats apply compression to keep files manageable.
Raster formats shine where every pixel can differ from its neighbor: photographs, digital paintings, scanned textures, screenshots and anything with soft shadows or noise. Editors such as Photoshop and GIMP work on pixels directly, which is why you can paint, smudge and retouch freely.
How Vector Graphics Work
A vector graphic stores instructions instead of pixels: "draw a curve from this point to that point, fill it with this color." The software that opens the file converts those instructions into pixels at the moment of display, at whatever size is needed. This is why a vector logo looks equally sharp on a phone and on a trade-show banner.
Under the hood, curves are usually stored as Bézier segments, each defined by end points and control handles. A simple icon might need only a few dozen points. Here is a complete vector image of a filled circle in SVG:
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
<circle cx="50" cy="50" r="40" fill="#1e88e5" />
</svg>That file is under 150 bytes and can be drawn at 10 pixels or 10,000 pixels with identical sharpness. Vector files also stay editable: you can change a color, move a point or resize a shape without degrading anything. For a deeper look at the most common vector format on the web, see what SVG is and how it works.
Raster vs Vector Graphics Compared
The table below summarizes the practical differences between raster and vector images.
| Aspect | Raster graphics | Vector graphics |
|---|---|---|
| Building block | Pixels in a grid | Points, lines, curves and fills |
| Scaling | Loses quality when enlarged | Sharp at any size |
| Best content | Photos, paintings, textures | Logos, icons, type, diagrams, line art |
| File size depends on | Pixel dimensions and compression | Number of shapes and points |
| Editing tools | Photoshop, GIMP, Affinity Photo | Illustrator, Inkscape, Affinity Designer, Figma |
| Common formats | JPG, PNG, WebP, GIF, TIFF, BMP | SVG, AI, EPS, PDF, DXF |
| Cutting machines and plotters | Not directly usable for cut paths | Required for cut and engrave paths |
| Realistic detail | Excellent | Limited; complex realism means huge files |
For a format-level look at one specific pairing, our article on SVG vs JPG walks through file size and quality trade-offs in more depth.
How to tell whether a file is raster or vector
The quickest test is to zoom in to 800% or more. If edges turn into visible squares, the artwork is raster; if they stay smooth, it is vector. You can also open the file in a vector editor and switch to an outline or wireframe view: true vector artwork shows its paths, while an embedded photo appears as a single rectangle. With SVG files, opening them in a text editor helps too. Lots of <path> elements mean real vectors, while one long <image> tag with base64 data means a raster picture wrapped in an SVG.
Raster vs Vector for Print and Web
For print, vector is preferred for anything with edges, and raster is fine for photos as long as the resolution is high enough. Printers measure raster quality in pixels per inch at the final size. A common target for close-viewing print such as flyers is 300 PPI, so a 4 × 6 inch photo needs about 1200 × 1800 pixels. A logo sent as vector has no such limit, which is why print shops ask for vector logo files.
Large-format jobs show the difference clearly. A 1000-pixel-wide logo printed on a 3-meter banner works out to under 10 pixels per inch, and every edge will look jagged. The same logo as a vector prints cleanly at any width. Our help article on using ToSVG for print design covers preparing vector artwork for print.
On the web, the question is file weight and screen density. Vector graphics stay crisp on high-density displays without exporting 2× and 3× versions, and simple icons are often only a few hundred bytes. Photos remain raster, and a modern compressed raster format is the efficient choice. A typical page uses both: vector for the logo, icons and illustrations, raster for photos.
Quick decision guide
- Will it be printed larger than its pixel size allows? Use vector.
- Does it need to change color or animate with CSS? Use vector.
- Will it be cut on a Cricut, laser or CNC machine? Use vector.
- Is it a photo or a painting with soft blends? Use raster.
How to Convert Between Raster and Vector
Converting vector to raster is straightforward, while converting raster to vector requires tracing. The two directions behave very differently.
Vector to raster (rasterizing)
Any vector editor or browser can export a vector graphic as PNG, JPG or WebP. Decide the final pixel size first, and export at 2× if the image will appear on high-density screens. Once rasterized, the image has a fixed resolution, so keep the vector original as your master file.
Raster to vector (vectorizing or tracing)
Tracing software analyzes the pixels, groups similar colors into regions and fits curves around their edges. It works best on images that already look like vector art: logos, clip art, signatures, icons and high-contrast drawings. You can trace in desktop apps (see our guide to converting an image to SVG in Inkscape) or online:
- Start with the largest, cleanest version of the image you have. Blurry or tiny sources trace poorly.
- Upload it to the ToSVG image to SVG converter (PNG, JPG, WebP, GIF, BMP or TIFF, up to 10 MB).
- Crop to the subject in the built-in editor so the tracer ignores stray background.
- Choose black-and-white mode for line art and text, or color mode for multi-color logos.
- Use the speckle filter to drop tiny noise regions, and reduce color precision if the result has too many shades.
- Download the SVG and check the edges at high zoom before using it for print or cutting.
If you want to understand what the tracer is doing at each step, read how image-to-SVG conversion works. Keep expectations realistic for photos: tracing turns them into a posterized, illustrated look rather than a faithful copy.
Frequently Asked Questions
Is a PNG a raster or vector file?
PNG is a raster format: it stores pixels, even when it has a transparent background. To get a vector version, you need to trace it into a format like SVG.
Is PDF raster or vector?
PDF is a container that can hold either. A PDF exported from a design app often contains vector artwork, while a scanned document saved as PDF contains raster images.
Can you turn any image into a vector?
You can trace any image, but quality varies. Logos, line art and flat illustrations convert well; photos become stylized and can produce very large files.
Why do printers ask for vector files?
Vector artwork prints with sharp edges at any size and lets the printer adjust colors or separate spot colors easily. A raster logo may look jagged once enlarged to the print size.
Ready to turn a pixel logo or drawing into clean paths? Convert your image to vector SVG with ToSVG for free, with no signup required.