Password protect a PDF online

Lock your document with strong AES encryption. Set a password required to open the file, plus an optional owner password that governs editing and printing permissions.

How to Password protect a PDF

1. Step 1. Upload your PDF.
2. Step 2. Enter the user password (needed to open the file).
3. Step 3. Optionally add an owner password to control permissions.
4. Step 4. Execute and download the encrypted PDF.

Frequently asked questions

How strong is the encryption?

Documents are protected with AES (128/256-bit) encryption, the same standard used by commercial PDF suites.

What is the difference between user and owner passwords?

The user password is required to open the document; the owner password controls permissions like printing, copying, and editing.

Can I remove the password later?

Yes — use the Remove Password tool with the password you set to decrypt the file back to normal.

Do you store my password?

No. Passwords are used in-memory during processing only and are never logged or persisted.