JunoPDFAES-256 encryption
Password protect PDF
Encrypt your PDF with an AES password directly on your device.
Password protect PDFPDF
Password protect PDF
or drop your PDF here
✓ No uploads✓ No sign-up✓ Local processing
Local processing
Password required to open
Open. Edit. Done.
Three clear steps without uploading the document to a server.
Choose your PDF document
From your device
Use the tools in the editor
Review the result immediately
Download the result to your device
Save a new copy
Your document stays on your device.
Why use this tool: Password protect PDF
Encrypt your PDF with an AES password directly on your device.
Private browser processing
The tool uses the PDF editor and keeps the document on your device. You do not have to wait for an upload or trust a cloud service with the file contents.
Review before download
Review the result before downloading and continue using text, signature, image and page organization tools. Changes are written only when you choose to export a new PDF.
Original and compatibility
Keep a copy of the original when working with important documents. Complex PDFs can contain embedded fonts, layers or restrictions that depend on the software used to create them.
Long and complex documents
Multi-page documents use progressive thumbnails and an automatic mode for large files. Pages do not have to be rendered all at once, which reduces memory use and interface delays. Actual performance depends on the device, file size and graphical complexity of the PDF.
Check before sharing
Before exporting, review the pages and every element you added. The downloaded file is a new copy, which preserves the original and lets you compare the result. For legal or administrative documents, always confirm the required signature type, document requirements and PDF compatibility expected by the recipient.
Capabilities, output and limitations
Password protect PDF
Encrypt your PDF with an AES password directly on your device.
- AES-256 encryption
- Local processing
- Password required to open
The result is created as a separate copy on your device. Review the preview, pages and compatibility before sharing an important document.
How to use Password protect PDF
Encrypt your PDF with an AES password directly on your device.
Check the document
Encrypt your PDF with an AES password directly on your device.
AES-256 encryption
Choose a long, unique password and encrypt the new copy with AES-256.
Export a new copy
Reopen the PDF with its password and send the file and password through separate channels.
AES-256 encryption
Encrypt your PDF with an AES password directly on your device.
On-device processing
The document is processed locally in your browser with no cloud upload or registration.
Output and limitations
JunoPDF does not store or recover the password; without it the file may become unusable.
Specific review
Reopen the PDF with its password and send the file and password through separate channels.