Guides
How to redact a PDF so the words are really gone
Why a black box over text is not a redaction, where removed words still hide, and how to redact a PDF and check it.
Is it safe to upload a PDF to an online tool?
What happens to a file you upload to an online PDF service, how long the best-known ones say they keep it, and how to tell whether a tool uploads at all.
How to make a PDF small enough to email
Why a PDF gets too large to attach, how to shrink one while keeping its text sharp, and what to do when it is still too big.
How to convert a scanned PDF to an editable Word document
Why a scan converts to Word as pictures, and how OCR turns it into text you can edit.
A private alternative to Smallpdf, iLovePDF and Acrobat online
How OnePDF compares with the best-known online PDF services, where it differs, and when another tool is the better choice.
How to edit a PDF on a Chromebook
Windows and Mac PDF editors do not run on ChromeOS. How to edit, sign, fill, merge and convert PDFs in Chrome instead.
How OnePDF works: a PDF engine in your browser
The engine behind OnePDF: one Rust codebase for the phone and the web, compiled to WebAssembly, with text recognition that runs on your device.