Password Protect PDF
Encrypt PDF files with an open password, owner password, and custom document permissions.
Last updated: June 9, 2026
Upload a PDF to protect
Drag & drop or browse
Protection Settings
No password yet
Encryption happens locally in your browser memory. Keep the open password somewhere safe, because protected PDFs cannot be opened without it.
Password Protect PDF — No Uploads Required
Secure sensitive PDF files directly in your browser with real password-based encryption. Add an open password required to view the document, set an optional owner password for administrative access, choose modern AES-256 encryption or legacy RC4 compatibility, and control permissions such as printing, copying, editing, annotations, form filling, accessibility extraction, and page assembly. Your file is read locally, encrypted in memory, and downloaded back to your device without being uploaded to a remote server.
Why This Tool Exists
What makes this useful — and why I built it this way.
Keep Confidential PDFs Safer: Add open-password protection before sharing contracts, invoices, reports, or records.
Control Document Usage: Limit copying, editing, printing, and page changes based on your delivery needs.
Private Local Encryption: Protect documents in browser memory without uploading sensitive files to a server.
When You'd Use This
Real situations where this tool saves the day.
Client Delivery: Send password-protected proposals, statements, and signed documents.
Internal Records: Restrict copying or editing on HR, finance, and legal PDFs.
Controlled Review: Allow comments or form filling while blocking content modification.
Using Password Protect PDF
It's straightforward — here's how it works.
Upload the PDF file you want to protect.
Enter and confirm the open password, or generate a strong password automatically.
Optionally add an owner password for administrative control.
Choose AES-256 for modern security or RC4 only when older PDF readers need compatibility.
Adjust document permissions for printing, copying, editing, annotations, forms, extraction, and page assembly.
Click 'Protect & Download' to save the encrypted PDF.
Questions People Ask
Honest answers about how this works.
Does this tool really encrypt the PDF?
Honestly? Yes. The tool applies PDF password encryption to the document bytes before download. Use AES-256 for modern PDF readers and RC4 only for legacy compatibility.
What even is the difference between open and owner passwords?
The open password is required to view the PDF. The owner password is used by PDF software to manage or override permission restrictions such as printing, copying, or editing.
Can I reallymgira recover my password if I forget it?
No. Encryption happens locally in your browser and passwords are not stored or uploaded. Keep a copy of the password in a secure password manager.
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