AI Document Platform
Add password protection to any PDF instantly.
Encrypt your PDF with a password so only authorized recipients can open it. All processing happens locally in your browser — your file never leaves your device.
- Price
- Free
- Input
- PDF file
- Output
- Encrypted PDF
PDF
Upload a PDF to protect
Drag and drop a PDF here, or choose a file from your device.
PDF only. Set a password and download your encrypted PDF.
or upload from
Waiting for upload
Drop files here or click upload.
- Accepted files: PDF
- Files: 1
- Per-file limit: 50.0 MB
FAQ
PDF password protection questions
How do I password protect a PDF?+
Upload a PDF, enter a password of at least 4 characters, and download the encrypted result.
Is my PDF sent to a server?+
No. All encryption happens in your browser. Your file and password never leave your device.
What encryption standard is used?+
DockDocs uses AES-128 encryption, which is supported by all major PDF readers.
Can I recover a forgotten password?+
No. Keep your password safe — encrypted PDFs cannot be opened without the correct password.
Protect PDF
Add password protection to your PDF.
Use DockDocs to encrypt PDFs with a password — entirely in your browser.