PDF security tools

Controlling who can open a document and what it gives away. Add password to PDF encrypts the file so a viewer asks for the password before it renders anything; Remove PDF password does the reverse when you know the password and no longer want to type it every time. Neither is a way around a password you were never given.

Redact PDF offers two deliberately different modes: Wipe rasterises each marked page into a new page image with the black regions burned in, while Cover only draws boxes over content that remains in the file. Whiteout is also visual cover, not redaction. Edit PDF metadata rewrites the title, author, subject and keywords that travel with the file and that most people forget exist at all; they are a common accidental leak when a document is repurposed from an old template. Sign PDF places a drawn or typed signature image on one page per download. It is a visual mark, with no certificate, identity check, timestamp or tamper validation.

A security tool that asks you to upload the document first is working against its own purpose. Everything in this category runs inside the browser tab, so the unencrypted original, the password you type and the text you redact are all handled on your own device and nowhere else.