PDF guides

Short, practical answers to the most common PDF questions.

How to merge 2 or more PDFs into one file

A simple step-by-step guide to merging 2 or more PDFs into one file on Android, iPhone, Windows and Mac — free and without installing anything.

How to reduce PDF size for online forms (100 KB, 200 KB and more)

Learn how to compress a PDF under 100 KB, 200 KB or any limit for exam, job and government form uploads — free, on phone or computer.

How to convert photos (JPG) to PDF on your phone

Turn photos from your gallery into a PDF on Android or iPhone in under a minute — free, no app needed, with a size limit option for forms.

How to split a PDF into multiple files

Three easy ways to split a PDF: by page ranges, every page, or equal parts — plus how to save just one page. Free and private.

How to sign a PDF online without printing

Add your signature to a PDF without printing or scanning. Draw, type or upload your signature, place it and download — on phone or computer.

Are online PDF tools safe to use?

What happens to your files when you use an online PDF tool, the risks of uploading private documents, and how browser-based tools keep files on your device.