Guides

PDF guides

Practical, privacy-first guides to merging, compressing, signing, splitting, and converting PDFs on any device.

• How Browser-Based PDF Tools Work

  A plain-language explanation of how PDF tools can merge, compress, and convert files entirely inside your web browser without uploading them.

• How to Convert iPhone Photos to PDF

  Turn HEIC photos from your iPhone or iPad into one PDF, using the Files app or your browser, with tips for photographing documents.

• How to Merge PDFs on a Mac

  Combine PDF files on macOS with Preview or in your browser, and how to pick the right method for your documents.

• How to Merge PDFs on Windows Without Installing Software

  Windows has no built-in PDF merger. Here is how to combine PDF files for free in your browser on Windows 10 and 11.

• How to Reduce PDF File Size for Email

  Why PDFs get too big to email, what the attachment limits are, and how to shrink a PDF in your browser without uploading it.

• How to Remove Hidden Metadata from a PDF

  What metadata a PDF stores, why it can leak names and software details, and how to view and strip it before you share a document.

• How to Sign a PDF Without Printing It

  Add your handwritten signature to a PDF on a computer or phone, without printing, scanning, or uploading the document.

• How to Split a PDF into Separate Files

  Three ways to split a PDF, by page ranges, every few pages, or one file per page, and how to choose the right one.

• Is It Safe to Edit PDFs Online?

  What happens to your file when you use an online PDF tool, the risks of uploading documents, and how to check whether a tool processes files locally.

• PDF vs PDF/A: What Is the Difference?

  PDF/A is the ISO standard for long-term archiving. Learn how it differs from regular PDF, its versions and conformance levels, and when you need it.