We recommend saving your artwork as a PDF — it preserves fonts, colors, and layout exactly as designed. We also accept JPG, JPEG, TIF, TIFF, and EPS. For PDFs, embed all fonts or convert them to outlines and flatten your layers before uploading to prevent substitution issues. For roll labels and specialty products, vector files (EPS or PDF) give the sharpest output; use 300 DPI or higher and 100% K-only black for fine lines and text smaller than 9pt.