What this tool does
CSV Column Editor
The first row supplies the headers. Keep or remove each column, move it up or down in the output order, and enter a replacement header. Review the transformed table before downloading UTF-8 CSV.
Private, local-first data tools
CSV Column Editor
Keep only the fields you need, arrange them for the destination, and rename headers before downloading a new CSV.
Processed in your browserNo account requiredEncoding and delimiter controlsIncomplete exports are blocked
CSV input settings
Choose the corresponding file again after changing a setting.Choose a CSV file or try the sample.
How to use it
- Choose the CSV and confirm its encoding, delimiter, headers and column count.
- Select the columns to keep, move them into order and edit the output header names.
- Apply the changes, compare the preview and row count with the source, then download CSV.
Common tasks
- Remove unused fields before importing a CSV into another system.
- Reorder identifiers and required fields to match a documented column layout.
- Rename headers without opening the data in spreadsheet software.
Privacy and local processing
Local files are read by a dedicated browser worker and are not uploaded to an application server. File contents and filenames are not included in analytics events. Loading a public URL is an explicit direct request from your browser and may fail when the remote server blocks CORS.
Supported edge cases
- Empty or duplicate source headers stop the operation because columns cannot be addressed unambiguously.
- A header row is required. You cannot remove every column or create duplicate output headers.
- Cell values remain text, so identifiers such as 00123 are not converted to numbers.
Frequently asked questions
Does this overwrite my source CSV?
No. The browser builds a separate result and downloads it as columns-edited.csv.
Can I edit individual cell values?
This page changes which columns are kept, their order and their header names. It does not provide cell-by-cell editing.