CSV Column Inserter

The CSV Column Inserter Tool allows you to insert a new column at any position in your CSV file. Define custom values, choose the column index, and configure options like delimiter, whitespace trimming, and header row handling. Supports live preview and file export.

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

How to Use:

  1. Paste your CSV into the Input CSV field or import a .csv or .txt file.
  2. In the Values to Insert box, enter one value per row.
  3. Use the Options panel to customize behavior:
    • Toggle Header Row Present if the first row is a header.
    • Set a Header for New Column (applies only if header row is enabled).
    • Choose the Insert at Column Index (0 = beginning of row).
    • Toggle Trim Whitespace to clean up values.
    • Set a custom Delimiter (default is comma).
  4. Click Insert Column to apply changes instantly.
  5. Use Copy Output or Export to File to save your result.
  6. Click Clear All to reset everything.

What CSV Column Inserter Tool Can Do:

  • Inserts a new column at any index in the CSV structure.
  • Accepts one insert value per row and aligns them with existing data.
  • Automatically updates headers when enabled.
  • Supports flexible formatting with delimiter and trimming options.
  • Live output with flashing preview and row/column counter.

Example:

Input CSV:

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

Values to Insert:

024  
2024  
2024

Insert at Column Index:

1

Header for New Column:

Year

Result:

Name,Year,Math,Science  
Alice,2024,85,90  
Bob,2024,88,76  
Charlie,2024,90,88

Common Use Cases:

Use this tool to insert timestamps, tags, metadata, version numbers, or any contextual data directly into a specific location in each row. Ideal for preparing files for import into systems that require structured data with new fields.

Useful Tools & Suggestions:

Once you’ve inserted new columns into your CSV, CSV Column Replacer is useful if you need to tweak those values later without shifting everything again. And if you’re setting up the structure for export or review, CSV Column Exporter helps you pull just the sections that matter.

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