Encrypt PDF Online — Add Password Protection to PDF Files
Secure your PDF with password protection. Set user password to restrict opening and owner password to control printing, copying and editing permissions. All processing in your browser.
Upload PDF to Encrypt
Click or drag & drop
PDF Encryption & Password Protection
Secure your documents with strong encryption
Password Protection
Set a user password to prevent unauthorized opening and an owner password to control document permissions.
Permission Control
Restrict printing, copying text, and editing individually — full control over what recipients can do.
100% Private
All encryption runs locally in your browser. Your PDF and passwords are never sent to any server.
FAQ
We use AES-128 or AES-256 encryption, the same standard used by banks and governments. Your PDF is securely protected against unauthorized access.
The user password (open password) is required to open the PDF. The owner password controls permissions like printing, copying, and editing. You can set both or just one.
Yes — set a user password for opening and use the permission checkboxes to disable printing while keeping the document viewable.
Yes — AES-256 is military-grade encryption. Combined with a strong password, your documents are highly secure.
Yes — use our Unlock PDF tool to remove restrictions from a password-protected PDF (you'll need the password).
No — the content, layout, and formatting remain identical. Only access control is added.
No hard limit — since processing runs in your browser, it depends on your device's memory. Most PDFs up to 100MB work fine.
Related Tools
Other PDF tools you may find useful
Protect Your PDF with a Password Now
Free, instant PDF encryption — no signup, no upload.