Add AES-256 password protection to any PDF in seconds. Free, no signup.
Upload PDF
Max 100 MB. Files auto-delete after 1 hour.
Pick a password you can remember. There's no recovery, losing it means losing the PDF.
We re-write the PDF with AES-256 encryption, the same algorithm Adobe Acrobat uses. Anyone who opens the file in any PDF reader will be asked for the password.
We never store your password. Files auto-delete one hour after upload.
Drop the PDF you want to protect.
Pick a password of at least 8 characters - store it safely, we don't keep it.
Recipients will need the password to open the file.
AES-256, the same encryption used by Adobe Acrobat Pro and modern PDF readers.
Yes - use the Unlock PDF tool with the same password you set.
It's transmitted over HTTPS only to apply encryption, never stored, and the file is deleted within one hour.
Yes - we apply a single password that restricts opening; once opened, all standard permissions are granted.
Lock PDF with a password online for free using PDF Studio. AES-256 encryption protects your confidential documents - invoices, contracts, ID scans - with the same standard used by Adobe Acrobat.