Vector vs. Bitmap

Notice the visible pixels (squares) in the enlarged bitmap.

These are the basic 2 flavors of file formats.Vector formats are “resolution independent”: that means it can be scaled as big or small as you want, and the lines will always be crisp and sharp.Bitmap formats are “resolution dependent,” meaning that you can’t scale them larger, or they will start to look choppy.

A vector file is created with flexible points that use math to shape the lines. Think of the lines as stretchable rubber bands. If you increase the size, it’ll keep its shape but just get bigger. A bitmap file, on the other hand, is like a mosaic of tiny squares, called “pixels.” If you zoom way in, you will see the squares even bigger, and it won’t look good.

You should ALWAYS keep a copy of your logo in a Vector format, because there will often be occasions when you need your logo to be printed at a very large size—on your storefront sign, on tradeshow banners, etc.

Also, your printer and web designers will always need a vector version of your logo for anything they do (letterhead, business cards, websites, etc.).

Okay, now that you understand the difference between vector and bitmap, onto the file formats:

File Formats

1. WMF or EMF

(“Windows Metafile”) or EMF (“Enhanced Metafile”) – either of these formats are what you’ll use in Office applications like Word, Powerpoint, or Excel if you want to show them on screen or print them on your office printer. Characteristics are:

What’s the difference between WMF and EMF? EMF tends to display curves more smoothly, and is generally the better choice for office applications. But WMF is most commonly supported.

2. EPS

(“Encapsulated Postscript”) – Use this format for sending to a commercial printer, a sign maker, a publication, or anyplace else that needs a professional-level file. Confusingly, EPS can come in 2 different flavors: “vector” or “bitmap.” The EPS files I provide you are always vector. Characteristics of vector-format EPS files are:

Don’t try to use EPS in Office applications– they tend to have trouble, and make non-postscript printers–the type you most likely have in your office–choke.

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