The best type of file for large-format printing is a vector-based file. If you are uploading artwork such as a business logo or custom design, a vector file is recommended. This will generally be an original design file such as an .EPS, .AI, or even a .PDF saved out of the original design program. Vector files maintain quality at any size.
If you are uploading an image or photo, we recommend locating the largest-size file with the highest-resolution you can find. You can check image resolution by right-clicking on the file name and selecting “Properties.” Under the “Details” tab look for resolution—we recommend at least 300 dpi.
We can print images in any format, including .JPG, .PNG, .GIF and .TIF, however please be aware that printing small images at a large size can cause quality issues. If you are incorporating personal pictures and images into the design of your sign, always provide the largest version of the picture you have. We review all files before production and will let you know via a low-resolution proof email if there are any issues.
For more information about file types, please review this article about The Best Design File Type for Signs and Banners