Drop PDF file here
or click to select
How to Use
Upload PDF: Drag and drop or click to select a PDF file. Your file is processed locally in the browser.
Set Password: Enter an open password (required, min 6 characters) and optionally a permissions password to restrict print/edit/copy.
Encrypt & Download: Click "Encrypt PDF" to protect your file, then download the encrypted PDF. All processing is local.
Use Cases
Contracts: Protect confidential contracts before sharing to ensure only authorized persons can view.
Privacy: Secure personal ID scans, bank statements, and other sensitive PDF documents.
Academia: Protect research papers and thesis documents before submission.
Internal: Encrypt internal company documents like financial reports and strategy plans.
Technical Details
PDF Encryption Standards: PDF supports RC4 and AES encryption. This tool uses pdf-lib for AES-256 encryption. Password complexity directly affects security - use at least 8 characters with mixed types.
Frequently Asked Questions
Can I decrypt it later?
Yes, with the password. For removing protection, use a PDF unlock tool. Remember your password - it cannot be recovered.
Are files uploaded to a server?
No. Everything runs locally in your browser. Files never leave your device.
What password types are supported?
Open password (required to view) and permissions password (restricts print/copy/edit). Set one or both.
Maximum file size?
Up to 100MB recommended. Limited by browser memory. Use desktop software for larger files.
Will it work on all devices?
Yes. Standard PDF encryption works with Adobe Acrobat, browser viewers, and mobile PDF apps.
PDF Password Protect | No Signup, Client-Side ยท Data Never Uploaded
Free to Use ยท No Registration Required ยท Privacy Safe
Feedback: dexshuang@google.com