File Merger Tool
Merge multiple CSV, TXT or Excel files into one. Drag to reorder, auto-map columns by header, preview and download — all in your browser.
1Select files to merge
2Review & configure
Drag to reorder — the first file is the primary: its header defines the output columns.
Skip headers
Drop the first row of every file except the primary.
Auto-map columns by header
Re-orders each file's columns to match the primary's header.
Merge all sheets
Include every sheet of each Excel workbook.