Key Takeaways

  • Raster images are pixels; photos and detailed artwork are almost always raster.
  • Vector images are math; logos and icons are almost always vector.
  • Raster looks great at its original size, then degrades once you scale it up.
  • Vector stays sharp no matter how big or small you make it.
  • Most real-world projects use both: a raster photo with a vector logo layered on top.

If you’ve ever sent a logo to a printer and got back a blurry mess, you already know that not all image files are created equal. The whole vector-versus-raster debate sounds technical, but it really just comes down to one simple question: is the image made of pixels, or is it made of math?
A raster image is built from a grid of tiny colored squares called pixels. Once you’ve used up all the pixels a file has, that’s it; stretch it further, and it turns soft, blocky, or downright ugly. A vector image skips pixels altogether. It’s drawn from mathematical paths, so it can be blown up to the size of a billboard or shrunk to a favicon and never lose a hair of sharpness.
Here’s the catch most people run into: they design something as a raster file (a JPEG straight off a phone or a screenshot from Canva) and then need it resized for print, embroidery, or signage, and it falls apart. That’s usually the moment someone starts searching for a way to convert the file into something that scales cleanly, which is exactly the gap Plexail fills. Plexail specializes in taking messy raster artwork and turning it into clean, crisp vector files ready for anything from a business card to a storefront sign.

What is a Raster Image?

Picture a mosaic made of thousands of tiny colored tiles that’s basically a raster image. Zoom in far enough, and you’ll see the individual squares; that blockiness is pixelation, and it’s not a glitch; it’s just the file running out of information. Because raster images are pixel-based, their sharpness is capped by how many pixels they contain. A photo with a high pixel count can be printed fairly large and still hold up. One with fewer pixels turns fuzzy the moment you push it past its natural size. This is why almost all photography is raster. Cameras record light as pixel data, and that richness, subtle shadows, skin tones, and the gradient of a sunset are something raster handles far better than vector ever could.
Common raster file types:
Format Typical Use
JPEG (.jpg) Everyday photos, web images
PNG (.png) Photos or graphics that need transparency
TIFF (.tif) High-quality print or archival work
PSD (.psd) Editable working files in Photoshop
Vector vs. Raster

What is a Vector Image?

Vector images take a completely different approach. Instead of pixels, they’re built from points, lines, and curves defined by formulas. Think of a vector file as a set of instructions telling a computer, “Draw a line from here to there, then curve it this way.” Because those instructions get redrawn fresh every single time, vectors are resolution-independent; enlarge one all day and the edges never soften. That’s exactly why vectors are the standard for logos, icons, and illustrations: anything that has to look identical, whether it’s a tiny website favicon or a six-foot-tall sign on a shopfront. It’s also why any design studio worth its salt will ask for your logo as a vector file rather than a JPEG; it guarantees the same crisp quality no matter what happens to it down the line. If all you’ve got is a scanned or low-res version, this is precisely the kind of job Plexail handles, turning a rough raster logo into a properly built vector file that won’t fall apart the next time you need to resize it.
Common vector file types:
Format Typical Use
SVG (.svg) Web graphics, icons, and scalable logos
AI (.ai) Native Adobe Illustrator files
EPS (.eps) Print-ready artwork
PDF (.pdf)* can hold either vector or raster data
Note: A PDF isn’t automatically one or the other; that depends on how it was built.

Vector vs. Raster: Key Differences

With both formats clear, it helps to see them side by side. Here’s a raster vs. vector image comparison worth keeping handy when briefing a designer or exporting a file:
Feature Raster Vector
Made of Pixels Paths and points
Scaling Loses quality when enlarged Stays sharp at any size
Best for Photographs, detailed textures Logos, icons, illustrations
File size Larger, especially at high resolution Usually smaller
Editing Photoshop and similar tools Illustrator and similar tools
Color and detail Handles gradients well Best with flat, solid color
Common formats JPEG, PNG, TIFF, PSD SVG, AI, EPS

When to Use Each

Go raster for photographs or anything that needs fine detail, shading, or realistic texture, such as skin, fabric, and natural light. It’s also the right call for images going straight onto a website or social feed at a fixed size, since they won’t be stretched much after publishing. Go vector for a logo, icon, or anything likely to get resized often and always when artwork needs to print at multiple sizes, say a business card today and a trade-show banner next month.
A quick real-world example: say you run a small coffee roastery and your logo currently exists only as a PNG someone exported from a phone app. It looks fine on Instagram, but the moment you try to put it on a coffee bag, a window decal, or a delivery van, it turns pixelated on anything bigger than a business card. This is the exact scenario. Plexail was built for you: you send over the raster file, and it comes back as a clean vector you can scale to a van wrap without a single jagged edge.

Converting Between Vector and Raster

Going from vector to raster is easy; you’re just flattening paths into pixels, which happens automatically whenever you export a logo as a PNG or JPEG for the web. Going the other way is harder. Turning a raster image into a vector, called tracing or vectorizing, means using software or a skilled human. Estimate shapes and colors from the pixels and redraw them as paths. That works fine for something simple and high-contrast, like a scanned logo, but it struggles badly with photographs, since the shading and blending that make the image look photographic tend to get lost in translation. Rasterizing costs almost nothing; vectorizing a complex image always costs something, which is exactly why outsourcing it to Plexail tends to save more time and frustration than trying to trace it yourself.

Frequently Asked Questions

What is the difference between vector and raster images?

Raster is built from pixels and loses quality when enlarged. Vector is built from mathematical paths and stays sharp at any size, no matter how much you scale it.
It’s a raster; a JPEG is made entirely of pixels.
Because the file only ever contains a fixed number of pixels. Stretch it, and those same pixels get spread over a bigger area, making each one visibly obvious.
Use vectors for logos, icons, and anything that needs to scale across many sizes without losing sharpness, from a phone screen to a billboard.
SVG, AI, and EPS are the most common. PDFs can go either way depending on how they were made.
Yes, through tracing, though it works best on simple graphics rather than detailed photographs. If your logo or artwork only exists as a raster file and needs to be resized cleanly, Plexail can convert it into a proper vector without the guesswork of doing it yourself.
Vector, every time, is the only format that keeps a logo sharp, whether it’s a tiny favicon or a billboard. And if you’re starting from the raster-only logo, Plexail’s conversion service is a straightforward way to get it into vector form correctly the first time.