CSV Merge and Split Tools Free
Merge multiple CSVs or split one by row count. Preview, download. Handles headers. In the browser.
Upload 2 or more CSV files. Headers from the first file are used; duplicate headers in other files are skipped.
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Frequently asked questions
- What can the CSV tool do?
- Merge: combine two or more CSVs into one (with optional duplicate header handling). Split: divide one CSV by row count and download parts as ZIP.
- How does merging handle headers?
- You can keep the first file's header and skip duplicate headers from other files. Preview before downloading.
- What parses the CSV?
- PapaParse is used to read and write CSV. It handles quoted fields and different line endings.
- Are my files uploaded?
- No. All processing runs in your browser. Your CSVs never leave your device.
- Can I split by custom row count?
- Yes. In the split tab you choose how many rows per file. The tool chunks the CSV and offers them in a ZIP.