Protect PDF

Set a password to control who can open, print, or copy your PDFs. Strong AES encryption — your file is sent securely, protected, and never stored.

1 Upload PDF
Drop your PDF here or click to browse files
Private & Encrypted
Leave empty to use filename_protected.pdf. “.pdf” is added automatically.
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Important: Remember your password. If you lose it, the PDF cannot be recovered or opened.
FYI: The protected file's size may be slightly smaller or larger than the original. This is normal — encryption rewrites the PDF's internal structure. Your content is unchanged.
2 Security Settings
Required to open the PDF. Minimum 6 characters with at least two of: lowercase, UPPERCASE, numbers, symbols.
⚠ Passwords do not match
Controls what viewers can do with the PDF.
How to use this tool — guide & FAQ

How to password protect a PDF

Add a password to a PDF so only people with the password can open it — useful for salary slips, bank statements, contracts and ID documents. Protection uses strong AES encryption, the standard for securing PDFs.

How to protect a PDF

  1. Upload the PDF you want to lock.
  2. Type a strong password — and keep a copy somewhere safe, because it cannot be recovered.
  3. Download the password-protected PDF.

How your file is handled

To apply encryption, your PDF is sent over a secure HTTPS connection, protected on our server, and then discarded — it is not stored, logged, or shared. If you lose the password, we cannot unlock the file for you.

FAQs

Is it free? Yes — no watermark and no sign-up.

What encryption is used? Strong AES encryption, the accepted standard for protecting PDF files.

Can I remove the password later? Yes — if you know the password, open the file and save an unprotected copy.

Related guide: how to password protect a PDF. Other tools: Compress PDF, Sign PDF, Edit PDF.