Privacy-First CSV Numeric Cleaner

Problem

Automated number cleanup can corrupt order IDs, postal codes, leading zeros, long numbers, and formula-like cells.

Solution

Built a conservative browser-only parser and classifier that changes only evidence-supported numeric fields, protects ambiguous or identifier-like columns, and optionally hardens formula cells.

Deliverables

Drag-and-drop upload; quoted-field parsing; column classification; preview; selectable corrections; formula detection; CSV export; JSON audit.