Merge CSV files
Combine multiple CSV files into a single file, with no spreadsheet to open and no delimiters to fix. Upload your CSVs, choose the columns, and download the result.
- Reads CSV from any source — system exports, tools, and reports
- 100% private: your CSVs are processed on your device and never leave it
- You decide which columns make it into the final file
How to merge CSV files in 3 steps
- 1
Upload your CSVs
Drag in your CSV files. On the Free plan, merge up to 3 files at a time.
- 2
Choose the columns
See the detected columns in each CSV and keep only the ones that matter in the result.
- 3
Download the merged CSV
Generate the final file and download a clean new CSV, ready to use.
Free vs Pro
Free
Pro
Max file size
1 MB
2 MB
Rows per spreadsheet
500
5,000
Processing
Local (browser)
Priority server
Support
Community
Priority email support
Frequently asked questions
- Is merging CSV files with Tablix free?
- Yes. The Free plan includes 1 merge per month, with up to 3 files, 500 rows, and 3 columns in total. Need more? The Pro plan raises every limit.
- Are my CSV files safe?
- They are. On the Free plan, all processing happens right in your browser — your CSVs are never uploaded to any server.
- How many CSV files can I merge at once?
- On the Free plan, up to 3 files per merge, totaling 500 rows, 3 columns, and 1 MB. The Pro plan expands all of these limits.