PDF Encryption: Password Protection and Permission Controls

Two types of PDF passwords

PDFs support two password types:

• User password: Required to open/view the PDF
• Owner password: Required to bypass permission restrictions (print, copy, edit)

Encrypting a PDF

const res = await fetch('https://pdfrelay.com/api/v1/convert', {
  method: 'POST',
  headers: { 'Authorization': 'Bearer sk_live_...', 'Content-Type': 'application/json' },
  body: JSON.stringify({
    source: 'html',
    content: html,
    options: {
      encrypt: true,
      user_password: 'viewerpass',
      owner_password: 'adminpass',
      no_print: true,
      no_copy: true,
      no_modify: true,
    },
  }),
});

AES-256 encryption. Works with both the Rust engine and any PDF viewer that supports the standard.