Password protect a PDF without sending it anywhere
It would be odd to protect a private document by first uploading it to a stranger's server. PataPage encrypts your PDF in your browser. Neither the file nor your password is ever sent over the internet, so there is nothing to intercept and nothing stored. There is no sign-up, no watermark and no limit.
How to encrypt a PDF with a password
Drop your PDF, type a password and type it again to confirm. A small meter shows how strong it is. Longer is better: a phrase of several words beats a short word with a number on the end. Use the eye button to check what you typed, then press Protect PDF.
Your new file asks for the password whenever someone opens it, in Acrobat, Preview, Chrome, Edge and other PDF viewers. The content is locked with AES-256 encryption, a strong standard that is widely used.
Share the password separately
A password only helps if it travels a different way from the file. Send the PDF by email and the password by text message or in a call. Avoid putting both in the same message.
Good to know
Nothing is stored, so PataPage cannot recover a forgotten password. Keep a copy of your original unlocked file somewhere safe. Finish editing first: sign, add page numbers, watermark and compress the document before protecting it, because a protected file cannot be changed by other tools until it is unlocked. If a file is already protected, remove that protection in your PDF viewer before adding a new password.