Password Protect PDF
Encrypt your PDF to restrict unauthorized access, editing, and printing.
How to Password Protect a PDF
1.
Upload PDF – Drop the PDF file you want to encrypt into the upload area.
2.
Set Password – Enter and confirm the password. The document will be encrypted before download.
3.
Download Protected PDF – Save the encrypted PDF. Anyone opening it will need the password.
AES Encryption Applied
Upload a PDF file and set a password. The tool applies standard PDF password encryption to the document, locking it so any reader application will prompt for the password before rendering the content. The original layout, images, and embedded fonts are preserved exactly.
Permission Restrictions
Beyond the open password, PDF encryption supports permission flags that restrict specific actions on the document even for users who know the password—such as preventing printing, copying text selections, or modifying the file content. These restrictions are embedded in the encrypted output alongside the password.
Forgetting the Password
There is no password recovery mechanism built into the PDF encryption standard. If you lose the password after encrypting, the document becomes permanently inaccessible. If you need to remove an existing password from a PDF you already own, use the unlock PDF tool instead. To add an additional layer of visual protection on sensitive content, consider using the redact PDF tool as well.
Frequently Asked Questions
What type of encryption is applied to the PDF?
The tool uses standard PDF password encryption, which is recognized and enforced by all major PDF readers including Adobe Acrobat, Preview, and browser-based viewers.
Can I restrict editing and printing even if the user has the password?
Yes. PDF encryption supports permission flags that limit specific actions—such as printing, copying text, or modifying content—independently from the document open password.
Can I encrypt multiple PDF files at once?
This tool processes one PDF at a time. For multiple documents, repeat the process for each file individually.
Will adding a password change the visual layout or quality?
No. Encryption is applied as a security wrapper around the existing PDF structure. Text, images, fonts, and page layout remain completely unchanged.
What happens if I forget the password after encrypting?
There is no built-in recovery mechanism in the PDF standard. If the password is lost, the document becomes inaccessible. Store your password in a secure location before distributing the file.
Can I remove or change the password later?
Yes. If you know the current password, you can use the unlock PDF tool to remove it, then re-encrypt the file with a new password.
Is the PDF processed securely on your servers?
Yes. The file is transmitted over an encrypted HTTPS connection. All uploaded documents and encrypted outputs are automatically deleted from the server shortly after processing.
Does this tool work on scanned or image-based PDFs?
Yes. The encryption layer is applied to the entire PDF file container regardless of whether the content is text-based or scanned images.