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Prepend a TSV Column Examples

Review practical Prepend a TSV Column examples so you can understand expected input, output, and common patterns faster.

Why examples matter for Prepend a TSV Column

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.

Example pages are especially useful for text tools because they show what good input looks like, what kind of output to expect, and how the tool behaves in common scenarios.

Prepend a TSV Column examples

Add a source column first

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.

Add environment first

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.

How to use these examples

  1. Put the new column header on the first line
  2. Put one value per TSV row after that
  3. Leave a blank line
  4. Paste the TSV below
  5. Run the tool to add the new first column

Common mistakes in sample input

The number of new values does not match the number of TSV data rows

Fix: Provide one new value for each TSV row below the header.

Forgetting the blank line before the TSV body

Fix: Put the new header and values first, then a blank line, then the TSV.

Using spaces instead of real tabs in the TSV

Fix: Make sure the TSV itself uses tab-separated columns.

Next steps

After reviewing these examples, run the live tool with your own input. If your task involves a follow-up step, the related page can help you move to the next tool in the workflow.

Run the main tool

Open the main Prepend a TSV Column page and test your own real input.

Open Prepend a TSV Column