Mingmist/ Tools
繁中

Encrypt PDF and Set Permissions

Protect a PDF with an open password and configure printing, copying, modification, form, and assembly permissions.

Local processingOriginals preservedDirect export

Tool workspace

Processing stays in this tab
The source must be an unencrypted PDF.
Used to change permissions. Leave blank to generate and display one.

User permissions

Permission restrictions are voluntarily enforced by PDF readers and are not unbreakable DRM.

How to use

  1. Add an unencrypted PDF.
  2. Set the open password, owner password, and user permissions.
  3. Test the result in another reader and retain the original.

Privacy

Input and files are processed in the current browser tab. Mingmist does not receive the content unless you independently share the result elsewhere.

Limitations

Uses a pinned version of a third-party open-source encryption library. Output uses AES-128; permission flags are not unbreakable DRM and do not replace secure storage or transfer.

FAQ

Can permissions completely prevent copying or printing?

No. PDF permissions are enforced by readers and can be bypassed with the owner password or software that ignores restrictions.

Which encryption is used?

This version raises the document header to PDF 1.7 and uses the AES-128 standard security handler.

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