Sort CSV by any column — without uploading your file.

Yes. Add sort keys in priority order — the first key is primary, the second breaks ties, the third breaks further ties. Example: sort by country ascending, then revenue descending — alphabetical by country, but within each country, highest revenue first.

Text sort is alphabetical — "10" comes before "2" because "1" sorts before "2". Number sort compares numerically — 2 comes before 10. Pick number sort for any column that's actually numeric.

If your dates are in ISO format (YYYY-MM-DD or YYYY-MM-DD HH:MM:SS) they sort chronologically as strings. Other formats may not sort as you expect — convert to ISO first with Find & Replace, or add a date-sort mode in an upcoming release.

In text sort, "01" sorts differently from "1". In number sort, they're equal (both become 1). Choose based on whether leading zeros are meaningful — ZIP codes should sort as text to keep "01234" together; quantities should sort as numbers.

Yes. Rows with equal sort-key values retain their original input order. This matters when you want to preserve upstream ordering for ties.

Each sort key has its own direction — ascending or descending. You can mix them: sort by date ascending, revenue descending, in the same operation.

Yes. Drop an XLSX and sort exactly like CSV. Output back to XLSX or convert to CSV/TSV.

Browser sort is heavily optimized. 2 million rows sort in a few seconds on modern hardware. For 10M+ rows, you'll want a database — but sort will still work, just slowly.

Yes. Cells keep their original types. Sort only changes row order — never cell values.

"💾 Save settings" stores your output format. Sort keys depend on column names and aren't saved per session since the next file might have different columns.

Yes. As you pick a column, type (text/number/date), and direction, the preview table updates live — showing the first 10 rows as they'd appear in the sorted file. This lets you catch issues (e.g. dates treated as text, numbers with currency symbols) before downloading. The full file is sorted across all rows on download.

Add a second sort key. Click + Add sort key and pick a second column. Keys are applied in order from top to bottom — so the example would be: Key 1 = country (Text, Ascending), Key 2 = revenue (Number, Descending). Rows are grouped by country, then highest-revenue rows appear first within each country. You can drag-reorder by removing and re-adding keys.