[Superior]

What types of files can I upload?

For absolute control over the look of your printed material, create and upload a print-ready PDF. If you upload a document that is not a PDF, the Lulu converter generates a print-ready PDF.

Note: If you plan to upload your source document and let Lulu convert it to a PDF, embed* any separate images into your source document before uploading. Do not include or link to external files by reference. If you do not embed all of your images, your project will not print as expected.

*embed?