Sending sensitive documents by email
Email is rarely encrypted in transit end-to-end. Password protection means the file is unreadable even if the email is intercepted or forwarded by mistake.
Password Protect PDF
Secure your PDF documents with password protection. Control who can view, print, copy, or modify your PDFs.
Maximum 1 file, 100MB
Select a PDF file to protect
Drop your PDF here
Drag file here or pick from your device
How it works
How it works
Pick a password, encrypt, send. Recipients need the password to open the file.
1
Drop your PDF
Add a single PDF up to 100 MB. Your original file stays unchanged.
2
Choose a password
Type the password twice so you don't lock yourself out by typo. Use something a recipient can remember if you'll be sharing the password too.
3
Download the protected PDF
The protected copy comes back as a separate file. Sharing it requires sharing the password by a different channel.
Use cases
What people use it for
Posting files to shared drives
On a shared drive that more people can access than should, a password limits who actually opens the file.
Sharing through messaging apps
PDFs forwarded through Slack, WhatsApp, or Telegram pass through company and platform servers. A password keeps the contents private if the file ends up somewhere you didn't intend.
Sending IDs or signed contracts
Anything with personal identification numbers or signatures benefits from a layer the recipient has to actively unlock.
FAQ
Frequently asked questions
AES-256. It's the algorithm used by recent versions of Acrobat and holds up well against brute force when paired with a long password.