Pro · Business · Enterprise · Files deleted after 1h
Password Protect PDF
Encrypt a PDF with a password so only people who have it can open the file — strong AES-256.
Protect a PDF with a password →A Pro tool — one free try with a free account · Files permanently deleted after 1 hour
Strong AES-256 encryption
The PDF is encrypted with the modern AES-256 standard — opening it requires the password you set.
Simple to share securely
Send the protected PDF and the password separately; only holders of the password can open it.
Private & fast
Uploaded over HTTPS, processed on EU servers, never shared, and your password is used only for this conversion and never stored.
How it works
1
Upload your PDF
Drag and drop your .pdf file or click to browse.
2
Set a password
Type the password that will be required to open the PDF.
3
Download the protected PDF
Ready in seconds — click Download.
Common questions
Is this a Pro tool?
Yes — the PDF tools are part of the Pro tool set (Pro, Business and Enterprise). The everyday format converters stay free.
What encryption is used?
AES-256 — the same strong standard used by modern secure PDFs. The password you choose is required to open the file.
Do you keep my password?
No. The password is used only to encrypt this one file during the conversion and is never stored or logged. If you lose it, the PDF can't be opened.
Is there a file size limit?
Pro raises the limit to 500 MB per file with 3,000 credits a month; larger plans go higher.