CSV Column Add/Remove
Reshape headers and manage columns without Excel. Add new columns or strip unwanted ones.
Last updated: April 30, 2026
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CSV Column Add/Remove — No Uploads Required
Take control of your CSV structure with our Column Manager. Often, data exports contain too many columns or are missing key fields needed for your next step. Our tool allows you to visually select which columns to keep, reorder them, and add new empty or constant-value columns without needing heavy spreadsheet software. Perfect for preparing data for database imports or cleaning up messy system exports. All processing is done locally, ensuring your data remains private.
Why This Tool Exists
What makes this useful — and why I built it this way.
Data Minimalism: Strip away unnecessary data to reduce file size and complexity.
System Ready: Format columns exactly as required by your target application.
Time Saving: Manage columns in seconds without opening Excel or Google Sheets.
Privacy First: Your sensitive data is processed entirely in your browser.
No Learning Curve: A simple, simple interface for complex structural changes.
When You'd Use This
Real situations where this tool saves the day.
Import Preparation: Strip unwanted columns from CRM exports before importing to a new system.
Data Cleaning: Remove sensitive PII columns from a dataset before sharing it with a team.
Header Normalization: Reorder columns to match a specific template for automated processing.
Field Addition: Add a new 'Source' or 'Status' column to multiple files at once.
Log Analysis: Keep only the timestamp and message columns from a verbose system log.
Using CSV Column Add/Remove
It's straightforward — here's how it works.
Upload your CSV file to the manager.
Use the checkbox list to select which columns to keep.
Drag columns to change their order in the output.
Click 'Add Column' to insert a new field with a default value.
Preview the modified structure and download your new CSV.
Questions People Ask
Honest answers about how this works.
Will it change my data values?
Great question. No, the tool only affects the structure (columns). Your row data remains exactly as it was in the original file.
Can I really rename columns?
Honestly? Yes, you can easily edit the header name of any existing or new column.
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