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ERR_PDF_PASSWORD_PROTECTED — PDF Password Protected

HTTP Status: 400 Retryable: No Automatic retry: None. Password-protected PDFs cannot be processed without the password.

What the User Sees

This PDF is password-protected and cannot be processed. (ERR_PDF_PASSWORD_PROTECTED)

What Causes This Error

The PDF has encryption applied, either as an open password (required to view the document) or as a permissions password (restricts printing, copying, editing). This is detected during the preflight check via the encrypted blocker code.

Even PDFs with permissions-only restrictions (no open password required) cannot be reliably processed because the encryption prevents automated text extraction and page rendering. Some PDF libraries can bypass permissions-only encryption, but this is legally and ethically questionable, so the system rejects all encrypted PDFs.

The encryption is embedded in the PDF structure and is detected before any credits are charged or conversion work begins.

Resolution Steps

For Users

  1. Open the PDF in Adobe Acrobat, enter the password, then use File > Save As to save a new copy without password protection.
  2. Online tools like SmallPDF or iLovePDF can remove passwords if you have the password. Upload the file, enter the password, and download the unprotected version.
  3. If the PDF only has permissions restrictions (you can view but not copy/print), open it in Adobe Acrobat Pro and remove the security settings under File > Properties > Security.
  4. If you do not have the password, contact the document author to request an unprotected version.
  5. Some PDF viewers (like Chrome’s built-in viewer) can open permissions-restricted PDFs — try printing to PDF from that viewer to create an unprotected copy.

For Administrators

  1. No admin action is needed for this error — it is working as designed.
  2. The encryption detection is in services/pdf-preflight.ts via the encrypted blocker code.
  3. Do NOT implement password-protected PDF support or encryption bypass — this raises legal and licensing concerns.
  4. If users frequently ask about this, consider adding a help article explaining how to remove PDF passwords.