You can review a DS-160 Exemplar to see the types of questions asked, including personal details, travel history, and security background.
You can use the "Save Application to File" button to download a data file to your computer. This isn't a PDF, but you can later upload this file to the CEAC website to resume your application. ds-160 blank form download pdf 2023
While you cannot download a blank version to fill out offline, you can access an (sample) to see the questions in advance or save your progress as you go. Why the DS-160 Is Online-Only You can review a DS-160 Exemplar to see