Vector vs raster: which file does your printer actually need?

If you've ever ordered shirts, stickers, signs or embroidery, you've probably been asked for "a vector file." And if you're like most people, you sent a PNG, got asked again, and wondered what the difference actually is.

It's simpler than it sounds. There are two ways to store an image, and printers care a lot about which one you send.

Raster: a grid of pixels

A raster image is a grid of tiny coloured squares called pixels. Photos are raster. Screenshots are raster. Almost every logo you download from a website or social media is raster.

Common raster formats:

• PNG, which supports transparency and is the best raster format for graphics
• JPG / JPEG, which is good for photos but loses quality every time it's saved
• GIF, WebP, HEIC, BMP, TIFF

The key limitation: a raster image has a fixed number of pixels. Make it bigger and each pixel just gets bigger. That's why a logo that looks sharp on a phone can look soft or jagged on a banner.

Vector: a description of shapes

A vector file doesn't store pixels. It stores instructions: a circle here, this curve, this line this thick, this colour. Whatever program opens it redraws those shapes at the exact size you need, so it's always sharp.

Common vector formats:

• SVG, which works almost everywhere, including websites and cutting machines
• AI (Adobe Illustrator)
• EPS, an older format that many print shops still request
• PDF, if it was saved from vector software (a PDF can also just wrap a pixel image, more on that below)

One vector file works for a business card, a T-shirt and a billboard.

Which print methods need which file?

Different printing methods work in different ways, which is why the file requests vary.

Usually need vector:

• Screen printing, because each colour gets its own screen and the shapes have to be clean and separable
• Vinyl cutting, Cricut, Silhouette and plotters, because the blade follows paths, and paths only exist in vector files
• Embroidery, because digitizers work far better from clean vector shapes
• Laser engraving and cutting, for the same reason as vinyl
• Signage and vehicle graphics, because of the sheer size

Usually fine with a high-resolution raster (PNG):

• DTF (direct to film) and DTG (direct to garment), as long as the PNG is big enough and truly transparent
• Sublimation
• Most print-on-demand platforms, which typically ask for a large PNG

Even for the methods that accept PNG, starting from a vector means you can export a perfect PNG at any size, whenever you need it.

How to tell what you actually have

The file extension is a clue, not proof.

• .png, .jpg, .gif, .webp are always raster.
• .svg, .ai, .eps are usually vector, but a pixel image can be placed inside any of them. That's a raster file in a vector wrapper, and printers will spot it immediately.
• .pdf could be either.

The zoom test works for everything: open the file and zoom in as far as you can, say 800% or more.

• If edges stay perfectly crisp no matter how far you zoom, it's vector.
• If you start to see squares, blur or fuzzy edges, it's raster, whatever the extension says.

"Can't I just save it as SVG?"

This is the most common trap. Opening a PNG and choosing Save as SVG or Export as PDF doesn't create vector artwork. It creates a vector-format file with the same pixels sitting inside. The printer opens it, zooms in, and asks for a vector file again.

To get real vector artwork, the shapes have to be rebuilt as paths. There are two ways that happens:

1. Automatic tracing. Software guesses where the edges are and draws paths around them. It's fast and free, and it works reasonably on large, simple, high-contrast images. On small or compressed logos it produces lumpy curves, bent straight lines and thousands of unnecessary points.
2. Redrawing. Someone rebuilds the artwork shape by shape, with smooth curves, true straight lines, matched fonts and flat colours. It takes longer, but the result is what the original designer would have delivered.

For anything that represents your business, or anything going to a cutter or embroidery machine, redrawing is worth it.

What to keep once you have a vector file

Once you have proper vector artwork, keep a small set of files and send from these every time:

• SVG, for the web, Cricut and most modern tools
• PDF, for print shops
• EPS or AI, for shops that ask for Adobe formats
• A large transparent PNG, exported from the vector for anyone who only takes images

Name them clearly, store them somewhere safe, and stop sending the old website PNG around.

Quick summary

• Raster = pixels, fixed size, gets soft when enlarged.
• Vector = shapes, scales to any size, needed for cutting, screen printing, embroidery and large signs.
• Changing the file extension doesn't convert anything.
• Zoom in to 800%: crisp means vector, blurry means raster.
• A real conversion rebuilds the shapes; the best results come from redrawing, not auto-tracing.

Got a PNG, JPG, scan or screenshot that a printer won't accept? We turn it into clean vector artwork in SVG, AI, EPS or PDF that scales to any size and cuts correctly on Cricut, Silhouette and plotters. You'll see the price before you pay.