Share a PDF, not your internals
Business redaction is usually columns and names, not a full legal production. Same strip engine. Same rule: you choose the boxes. Encrypt after with Protect PDF if the cleaned file still should not be world-readable.
Typical fields
Unit cost, margin, employee IDs, other clients in a mixed export, comments in the margin. Walk landscape financials slowly — small type hides in headers.
Speed vs care
Local processing is instant in the sense of no upload queue. It is not instant in the sense of skipping review. A missed salary column is still a leak.
Large archives
Very large files and folder-scale redaction are Premium. The engine is still local pdf-lib, not a mystery OCR VPS.