Live tool
Protect PDF
Require a password before your PDF opens. PDFit applies AES-256 encryption and returns the protected document directly.
Private processing
Choose a PDF and password
Anonymous limit: one file, 10 MB, up to 150 pages.
- Your password is used only for this request and is never stored in job history or analytics.
- PDFit cannot recover a forgotten password—keep it somewhere safe.
- The input and result are removed after delivery, with a cleanup fallback.
Quick guide
How to password-protect a PDF
Encrypt a PDF with an AES-256 password without placing the password in history or analytics.
Choose a PDF
Select one PDF up to 10 MB and 150 pages.
Enter a strong password
Use a password you can share separately and store safely.
Encrypt and download
Create the protected PDF and save it immediately.
When this tool helps
- Protect a document sent by email
- Add a password to a personal archive
- Secure a client handoff before upload
Common questions
Can PDFit recover my PDF password later?
No. PDFit does not store the password, so keep a recoverable copy in a trusted password manager.
What encryption does Protect PDF use?
The current tool creates AES-256 password-protected PDFs for documents within the displayed free limits.