#063 · Rows Columns & Cells Tool

Rename Excel Columns

Upload a spreadsheet, select the sheet, set the header row, and enter replacement names separated by commas. Blank replacement names keep the original header.

Office File Tool

Local browser processing

Drop spreadsheet here

XLSX, XLS, CSV, or TSV
or click to choose a file

No file selected

Worksheet

Header row

row

Output format

Preview limit

rows

Preserve formulas Trim cell whitespace Keep empty rows Protect text values

How to use this office tool

Select or drop the supported file.
Review the detected sheet and adjust the operation-specific options.
Process the file, inspect the limited preview and output counts, then download the new result.

What this tool does

Each supplied name replaces the matching header cell from left to right.

Only the selected sheet is renamed. Duplicate or blank new names are flagged before export.

XLSX, XLS, CSV, and TSV inputs are supported. Output is a new XLSX workbook.

Supported formats

XLSX, XLS, CSV, and TSV inputs are supported. Output is a new XLSX workbook.

Format	Use
XLSX / XLS	Workbook data and formulas where applicable
CSV / TSV	Delimited tabular data with detected quoting

Tips for better results

Keep a copy of the original before changing production data.
Use a clear, unique header row.
Check identifiers, dates, formulas, and a sample of output rows.

FAQ

Does Rename Excel Columns upload my spreadsheet?

No. Processing happens in your browser, and the selected file is not sent to Calloffice.

What happens to formulas when I use this rename tool?

Formula cells are preserved where the selected operation can retain them, but the browser does not reproduce Excel's full calculation engine.

Can I use large files with Rename Excel Columns?

Yes, within your browser's available memory. The preview is capped, and very large workbooks may take longer or need to be split first.

How are dates, IDs, and leading zeros handled?

The tool uses displayed spreadsheet values where appropriate and avoids intentional numeric conversion unless the selected operation requires it. Review identifier columns after export.

What should I check before using the downloaded file?

Check the preview, output counts, headers, and a few representative rows. Keep the original file until the result has been verified.

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Processing summary

Stage	Behavior
Input	Rows Columns & Cells
Privacy	Local browser processing
Download	Newly generated result file

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