Excel & CSV File Merger
Start with 3 files below, add more if needed, then merge and download instantly.
Max files: 20 | Max each file: 200MB | Total: 200MB
Output Format
Header-Aware Merge
Combines rows based on column headers across all uploaded sheets.
Private & Secure
Everything runs inside your browser. Files are not sent to server.
Fast Download
One click merge with instant XLSX or CSV output file download.
How It Works
1
Add Files
Select CSV/XLS/XLSX files using the upload boxes.
2
Merge Data
Click Merge Files to combine rows in one unified table.
3
Download
Download merged output in XLSX or CSV format.