Protect PDF
Encrypt a PDF with a password (AES-256).
Drag & drop files here, or click to choose
.pdf · up to 3 files
Files are sent over encrypted HTTPS, processed on our servers, and permanently deleted within 2 hours.
About this tool
Protect PDF adds a password so only people you share it with can open the document — essential for contracts, statements, medical records, or anything confidential you're about to email. The file is encrypted, so its contents can't be read without the password you set.
Choose a strong password and share it with recipients separately from the file itself. Protection is applied in seconds, free, with no watermark and no sign-up.
How it works
- Choose your .pdf file(s)
- Pick your options
- Download the result
Frequently asked questions
How do I password-protect a PDF?
Upload the PDF, set a password, and download the encrypted file. Anyone opening it will need that password.
What encryption is used?
The PDF is encrypted with a strong standard so its contents can't be read without the password.
Can I remove the password later?
Yes — use our Unlock PDF tool on a document you can open to remove the password again.
How should I share the password?
Send it separately from the file — for example by text or a different email — so the two never travel together.
Is it free and private?
Yes. Free, no sign-up, and your file is deleted from our server within 2 hours.