Matched Worksheet Change Review HTML

Compare displayed cells at identical sheet names and addresses, select one matched worksheet and download its complete escaped change table.

• Exactly two XLSX files,20MiB each/40MiB combined. Source inspection requires a nonempty chosen worksheet with at most 49,999 data rows, 500 columns and 500,000 rectangular cells including its first/header row. The maintained workbook parser also limits each workbook to 50 sheets, each worksheet to 50,000 total rows, and cell text to 32,767 UTF-16 code units. Inspection selection changes per-file facts only; comparison still receives both complete originals and covers every exact matched sheet name. Sheets match exact names and cells match addresses by displayed text. Absent equals empty; equal cached formula text is unchanged. Added/removed sheets and sheet-order changes are separate source report facts, not final selected-sheet rows. No formula recalculation, formatting/charts/metadata, moved-row matching, native Excel or semantic workbook equality claim. Comparator10000records/16MiB record budget; connected operation rejects truncated or count-mismatched reports and empty differences. Complete report up to20MiB must fit next5MiB JSON input or remains as a rejected-handoff checkpoint. Final is complete inert escaped HTML source, not an executable host preview. Latest final checkpoint is filtered CSV, not full comparator report. Originals and checkpoints retain prior and omitted data. Source worksheet inspection affects facts only; comparison always covers all matched sheet names.