tsvkit.org
TSV (Tab-Separated Values) utilities, in the browser
Say hi →

Prepend TSV Column

updated 19 May 2026

prepend column
Drop a .tsv file here, or
ready

Prepend Column

Inserts a new column at position 1. Every data row gets the fill value (default empty). For a column at the end use append; for anywhere in between use insert.

Privacy

100% client-side. No upload. See the privacy policy.