Protect your sensitive PDF files with robust 256-bit AES encryption. Restrict viewing, editing, copying, and printing to ensure your data stays private.
Click to select a file or drag and drop
Your files never leave your device.
This password will be required to open the PDF.
If provided, usage restrictions will be applied. Leave empty for no restrictions.
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Drag & drop or fetch the PDF document you want to secure from your device.
Enter a required User password to restrict opening, and an optional Owner password to restrict permissions (copying, printing).
Hit 'Encrypt PDF'. The robust 256-bit AES algorithm will instantly secure your file right in your browser, ready for download.
Remove password protection and restrictions from your PDF documents.
Set or change user permissions on a PDF. Modify passwords and access controls.
Remove password protection and security restrictions associated with digitally signed PDF files.
Draw, type, or upload your signature.
Remove metadata, annotations, scripts, and more.
We use 256-bit AES encryption, which is currently the highest security standard available for PDF documents. It is practically impossible to crack using brute-force methods.
The User (or Open) password is the password required to open and read the document. The Owner (or Permissions) password is required to change usage restrictions, such as preventing viewers from printing, copying text, or making edits.
Yes. By setting an Owner password, ZentoPDF automatically applies usage restrictions that disable text copying, document editing, and printing for regular viewers.
Never. All encryption operations are performed locally within your web browser using WebAssembly. Your files and passwords never leave your device, ensuring maximum privacy.
Yes, if you know the password. You can use our Decrypt PDF tool to permanently remove the password from your encrypted document.