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GUIDES
How Foliovex Actually Works
A few genuinely technical explanations of the decisions behind this site — not a list of generic PDF tips, but the specific reasoning behind how the tools here are actually built.
Why Doesn't This Tool Ask You to Upload Your File?
Most online PDF tools upload your file to a server to process it. Here's what actually happens instead when a tool runs entirely in your browser, and how to check for yourself.
Covering Up Text in a PDF Isn't the Same as Removing It
Drawing a black box over sensitive text in a PDF often doesn't remove it — the text can still be selected or extracted underneath. Here's why, and what genuine redaction actually requires.