TSV Column Appender

The TSV Column Appender Tool allows you to add a new column to the end of each row in a tab-separated file. Insert values line-by-line, set a column header, and instantly preview, copy, or export the result.

Paste your input above or import a file below.
No file chosen
Supported file types: .tsv, .txt
Rows: 0, Columns: 0
Options
Header Row Present
Trim Whitespace

How to Use:

  1. Paste your tab-separated data into the Input TSV field or import a .tsv or .txt file.
  2. Enter one value per row in the Values to Append field.
  3. Use the Options panel to configure the output:
    • Toggle Header Row Present if the first row contains column headers.
    • Enter a Header for New Column (used if header is enabled).
    • Toggle Trim Whitespace to clean up each value.
  4. Click Append Column to update the output in real time.
  5. Use Copy Output or Export to File to save the result.
  6. Click Clear All to reset the tool.

What TSV Column Appender Tool Can Do:

  • Adds a new column to the end of each row in TSV data.
  • Supports inserting a header and matching one value per line.
  • Automatically adjusts rows and cleans extra whitespace.
  • Live preview with row/column tracking and flashing feedback.
  • Fully supports import, export, and copy-to-clipboard features.

Example:

Input TSV:

Name	Math	Science  
Alice	85	90  
Bob	88	76  
Charlie	90	88

Values to Append:

Pass  
Fail  
Pass

Header for New Column:

Result

Result:

Name	Math	Science	Result  
Alice	85	90	Pass  
Bob	88	76	Fail  
Charlie	90	88	Pass

Common Use Cases:

Use this tool to append tags, statuses, outcomes, or additional attributes to rows in a TSV file. Ideal for preparing structured data for import, enriching reports, or aligning external datasets.

Useful Tools & Suggestions:

Once you’ve appended new columns, TSV Column Prepender gives you the option to add more data to the beginning for things like IDs or categories. And if you’re reordering after all that, TSV Column Swapper makes rearranging everything a lot smoother without breaking the format.

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