CSV Select Columns & Sort

Create a focused CSV or TSV by selecting column positions in the order you want, then sort by a column in that selected output. Review the selection checkpoint and the final sorted table before downloading.

• The first row is the header. Selected column positions use the original table; sort positions use the selected output.
• Text sorting is stable, deterministic and case-sensitive. Numeric mode compares signed decimal and exponent values exactly, retains original cell spelling, and fails on blanks or nonnumeric values.
• Final formula protection preserves complete bounded signed decimal/exponent numbers and adds an apostrophe to formula or control-prefixed expressions. CSV/TSV imports may infer types; import identifier columns as text. Protection OFF retains literal expressions with spreadsheet execution risk.
• Inputs and intermediate admission are limited to 5 MiB; final output is limited to 20 MiB.
• Use UTF-8 text with a consistent number of fields per row. Ragged rows and malformed quoting fail before processing; blank physical lines in a multi-column table must be represented as correctly shaped empty records.
• A table may contain up to 50,000 data rows, 500 columns and 500,000 cells. Processed files quote every cell and use CRLF record separators.