How to use this office tool
- Choose the required spreadsheet file.
- Select the sheet and review the header-row setting.
- Run the tool and inspect the bounded preview.
- Download the newly generated result file.
#096 · CSV & Delimited Files Tool
Add Header Row to CSV
Add a clean, custom header row to a CSV or TSV file, check the column count, preview the result, and download a newly generated delimited file.
Office File Tool
Local filerow
rows
Ad space
What this tool does
This tool inserts user-provided column names above existing data and writes a new CSV or TSV with correct quoting.
Header names are split by the chosen delimiter, checked against the widest data row, and serialized with Papa Parse.
If the number of header names differs from the data width, processing stops so columns are not mislabeled.
Supported formats
CSV and TSV are the intended inputs. XLSX and XLS can be read, but delimited output is recommended for this operation.
| Format | Support |
|---|---|
| XLSX / XLS | Browser parsing; advanced Excel features may not be preserved |
| CSV / TSV | Delimited values with local parsing |
Tips for better results
- Enter one header name for every data column.
- Avoid duplicate column names when downstream systems require unique fields.
- Keep the protect-text option enabled when spreadsheet imports may interpret formulas.
FAQ
How do I add column names to a CSV without Excel?
Upload the file, enter comma-separated header names, and download the newly serialized CSV.
What if my header has fewer fields than the CSV?
The tool stops and reports the mismatch instead of shifting or dropping data.
Can header names contain commas?
Use the visible header delimiter option; for complex names, use a tab-separated header list and TSV output.
Will existing data rows be changed?
Values are parsed and re-serialized with valid quoting, but no data row is intentionally removed.
How is CSV formula injection handled?
When text protection is enabled, values beginning with =, +, - or @ are prefixed before export.
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Processing details
| Check | Behavior |
|---|---|
| Privacy | Local browser processing |
| Preview | Limited rows and columns |
| Output | New file generated |
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