PDF how-to guides

Prefer desktop tools for confidential files. Online PDF sites are fine only for non-sensitive documents.

How to merge PDF files (free and built-in options)Combine PDFs using Microsoft Edge, Adobe Acrobat, or Google tools. Keep originals backed up before merging.How to compress a PDF to reduce file sizeReduce PDF size with Acrobat compression, print-to-PDF settings, or trusted online compressors. Tips to keep text readable.