CSV Merger
Combine multiple CSV files into one, matching columns by header name.
Everything happens locally in your browser — files are never uploaded anywhere.
Combine multiple CSV files into a single file, matching columns by header name rather than position — so files with columns in a different order, or with some columns missing, still merge correctly instead of scrambling your data.
Handy for merging exports from different systems, monthly report files, or spreadsheets collected from multiple people into one consolidated file.
Frequently asked questions
- What happens if the CSVs have different columns?
- Columns are matched by header name across all files; any column missing from a particular file is left blank for those rows rather than causing a misalignment.
- Does column order matter across the files?
- No — because matching is done by header name, not position, files can have their columns in any order and still merge correctly.
- Are my files uploaded anywhere?
- No — merging happens locally in your browser, so your data stays on your device.