Converters

CSV Column Renamer

Rename CSV header columns in bulk with a simple mapping.

Converters

Local only

CSV data

Renames (old = new, one per line)

Everything stays in your browser

Your text is processed on your device — nothing is uploaded to a server.

How it works

Paste CSV with a header row. Columns can be given by name or number. Use “old = new” (or old -> new) per line; data rows are untouched.

Good to know

How do I use it?

Enter your csv data, adjust the options and press “Rename”. Check the result, then copy or download it.

How does it work?

Paste CSV with a header row. Columns can be given by name or number. Use “old = new” (or old -> new) per line; data rows are untouched.

Is my data uploaded?

No. Everything is processed in your browser and nothing is sent to a server. No account is needed.