Sort data rows by one column while keeping the header fixed and preserving source order when values compare equally.
Inputs are limited to 1 MiB, 10,000 rows, and 256 columns.
Nothing is placed in a URL, account, or remote log.
Strict, bounded, local processing
Ordering is locale-aware, case-insensitive, and numeric-aware, so 2 sorts before 10 without silently converting stored cell values.
Rows are paired with their original position before sorting. When selected cells compare equally, that position breaks the tie and keeps the source order deterministic.
The header never participates in the sort and remains the first record.
The comparator recognizes numeric segments for useful ordering but does not rewrite, round, or coerce cell values. Define a typed schema when exact decimal or date semantics matter.
