Security
🔒 100% Client-Side Private
Protect PDF
Encrypt PDF documents with custom passwords securely in your browser.
🔒 Select PDF Document
Choose PDF or Drag & Drop Here
Supports standard PDF documents
How to Use Protect PDF
1
Upload your Document
Drag and drop your PDF file into the designated box or click to select from your device.
2
Configure Settings
Choose your preferred parameters or modes and preview the outcome.
3
Process and Download
Click the action button to process instantaneously in your browser and save your new file.
Frequently Asked Questions
How strong is the PDF encryption?▾
KoTool uses standard 128-bit/256-bit AES encryption compliant with Adobe Acrobat standards.