Method 2026-10-06.export-safety.1.
This is a supported date-format review, not a locale or legal-deadline decision. Dates use years 1900 through 2200. Numeric spreadsheet serial dates, named months, two-digit years, time-zone names, leap seconds and RFC 9557 annotations require separate review.
Reports summarize the first 100 result rows. Previews make whitespace and Unicode visible and are abridged after 400 characters. JSON preserves the complete parsed source. Source previews in Excel preserve positions, not exact source text.
XLSX formulas are represented as inert expression text for review, never executed. Numeric date cells remain numeric text; spreadsheet date formatting is not interpreted.
The source JSON is not an exact file-byte backup. Use Download original source in the tool and restore it through Select file. CSV findings and Excel cells are written as review text. Destination applications and repeated save/reopen behavior require separate testing. No sanitized production dataset or renamed source file is supplied.
