Text Tools
Add a new TSV column at the beginning of every row.
Use this tool to prepend a new column to TSV data. It is useful when you need to add a fixed field, source tag, environment marker, or other leading column before existing TSV data.
Use this tool to prepend a new column to TSV data. It is useful when you need to add a fixed field, source tag, environment marker, or other leading column before existing TSV data.
Use prepend a tsv column when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
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Input
source api api name role John admin Anna editor
Output
source name role api John admin api Anna editor
Useful when you want every row labeled with its source.
Input
env prod prod id title 1 Book 2 Pen
Output
env id title prod 1 Book prod 2 Pen
Adds a new leading field before the existing TSV columns.
Fix: Provide one new value for each TSV row below the header.
Fix: Put the new header and values first, then a blank line, then the TSV.
Fix: Make sure the TSV itself uses tab-separated columns.
It adds a new column at the beginning of the TSV and fills it with your provided values.
Yes. You should provide one value for each TSV data row.
No. It only adds a new first column and keeps the others in place.
The tool returns an error so you can fix the input.
Prepend adds the new column first, while Append adds it at the end.