CSV Merger Tool

 CSV Merger Tool With Header Mapping: Merge Multiple CSV Files Into One in Seconds

Upload one sample CSV, map columns from multiple CSV files, and instantly download a merged file.

✓ 100% Browser Based
✓ No Data Upload
✓ Free
✓ No Registration Required

Features

🔒 Files never leave your computer.
⚡ Merge thousands of rows in seconds.
🌍 Works in Chrome, Edge, Firefox, and Safari.
🆓 Completely free.

Use Case

  • Consolidate broker-wise capital gains statements into the ITR-required format in minutes.
  • Merge two or more CSVs

Step 1: Upload Files

Master CSV

Select the master CSV file that will serve as the base

Data CSV Files

Select one or more CSV files to merge with the master CSV

For other useful tools, visit Worthread

More info on CSV, visit Wiki