Office Add-in Excel: Type-Preserving PII
Source: anonym.community research
Summary
Research Source Excel PII Tools Break Cell Types and Miss Hidden Data anonym.community March 2026 feature analysis View Source Standard PII anonymization treats Excel cells as text, converting numbers to strings. This breaks formulas, sorting, filtering, and pivot tables. Additionally, hidden rows and columns contain PII that is invisible in the default view but present in the file — most tools skip hidden cells entirely. Multi-sheet workbooks require sheet-by-sheet processing, with inconsistent entity handling across sheets.
Evidence & Data Points
- Standard PII anonymization treats Excel cells as text, converting numbers to strings. This breaks formulas, sorting, filtering, and pivot tables. Additionally, hidden rows and columns contain PII that is invisible in the default view but present in the file — most tools skip hidden cells entir
Solution
The Solution: How cloak.business Addresses This Type-Preserving Processing cloak.business's Office Add-in preserves cell data types during anonymization. Number cells remain numbers. Boolean cells remain booleans. Date cells remain dates. Only text content containing PII is modified. Formulas that reference anonymized cells continue to function correctly. Hidden Row and Column Detection The add-in scans all cells, including hidden rows and columns. PII in hidden cells is detected and anonymized alongside visible content. Users receive a notification when PII is found in hidden areas, with the option to review before processing. Multi-Sheet Batch Processing Process all sheets in a workbook in a single operation. Entity detection is consistent across sheets — if 'John Smith' appears in
Compliance Context
Compliance Mapping This feature addresses GDPR Article 5(1)(d) (accuracy — type-preserving processing maintains data accuracy), GDPR Article 17 (right to erasure — hidden cells containing PII are detected and processed), and data quality requirements for regulatory submissions where numeric integrity is mandatory. cloak.business's GDPR, HIPAA, PCI-DSS, ISO 27001, SOC 2 compliance coverage, combined with Customer-selected hosting, provides documented technical measures organizations can reference in their compliance documentation.