Client financial data and third-party tools
Tax returns, financial statements, and client records carry an obligation of confidentiality that most accountants take seriously — and uploading them to a generic online converter, even briefly, means trusting that service's security and retention practices with data you didn't generate the right to share.
Converting locally in the browser sidesteps that trust question: the PDF-to-Excel or PDF-to-Word conversion happens on your machine, so client financial data never becomes another company's problem to secure.