Introduction Pathfinder First Edition (Pathfinder 1e), published by Paizo, is a widely played tabletop role-playing game (TTRPG). Interest in "Pathfinder 1e PDFs" generally falls into three areas: official digital products, third-party and fan-made content, and legal/ethical access and use.
Advanced Player’s Guide: This is where Pathfinder truly shines, introducing the Alchemist, Inquisitor, and the famous "Archetype" system that allows for infinite character variations. Beyond the Basics: Expansion PDFs pathfinder 1e pdfs
contain hundreds of monsters and creatures to populate your world. Expansion & Rule Supplements Introduction Pathfinder First Edition (Pathfinder 1e)
If you are looking for rules rather than the layout of a book, these sites are the community standard: Archives of Nethys (1e) published by Paizo