CSV Header Renamer
Rename CSV column headers in place to match import templates for CRMs and tools.
About CSV Header Renamer
CSV Header Renamer lets you rename column headers in place so a CSV matches the import template of a CRM, email tool or e-commerce platform — without touching the data rows.
How to use CSV Header Renamer
- 1Paste or type your data into the input box above (a sample is pre-filled so you can try it instantly).
- 2Adjust any options on offer — delimiter, columns, formatting and so on — to match what you need.
- 3Renaming happens instantly as you type; review the result in the output panel.
- 4Click Copy to grab the output or Download to save it as a file — CSV Header Renamer keeps everything on your device.
Why use CSV Header Renamer?
- ✓Mapping export columns to a CRM or Mailchimp import format
- ✓Cleaning up cryptic or duplicated header names
- ✓Standardising headers across multiple files
- ✓100% free with no sign-up, no watermark and no usage limits
- ✓Runs entirely in your browser — your data is never uploaded or stored
- ✓Works offline once loaded, with instant results and one-click copy or download
Frequently asked questions
Does renaming change my data?+
No — only the first (header) row is edited; every data row stays exactly as it was.
Can I rename only some columns?+
Yes — leave a column's box unchanged to keep its original name, and only edit the headers you want to remap.
Is it free to use?+
Yes — it is completely free with no sign-up, no account and no usage limits. There is no watermark and no paywall, so you can process as many files as you like.
Is my data private and secure?+
Yes. This tool runs entirely in your browser using client-side JavaScript — your data is never uploaded to a server, stored or logged. Once the page has loaded you can even use it offline, which makes it safe for confidential or proprietary files.
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