TSV Prepend Column

Insert a new column at the first (leftmost) position in a TSV table with a default value.

How It Works & Processing Standards

Insert a new column at the first (leftmost) position in a TSV table with a default value.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Desktop max file size: 50MB
  • Mobile max file size: 20MB

TSV Prepend Column is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use TSV Prepend Column

  1. 1
    Paste TSVEnter tab-separated data.
  2. 2
    Set Column DetailsSpecify header label and default value.
  3. 3
    Copy ResultExport the updated TSV table.

Examples

Prepend Category
Input: item price Book 15
Result: Prepend [cat="media"]: cat item price media Book 15

Common Use Cases

  • Adding fixed category or region prefixes to TSV tables
  • Adding index or status columns before Excel pasting
  • Standardizing multi-file dataset structures

Frequently Asked Questions (FAQ)

Are tab separators inserted automatically?

Yes, tab separators are cleanly positioned between the new column and existing fields.

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