Merge CSV Files
Combine multiple CSV files into one. Automatically aligns columns. Free, runs in your browser.
Drag & drop your files here, or click to browse
Add up to 20 files
Done!
DownloadHow to Merge CSV Files
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1
Upload CSV files
Drag and drop multiple CSV files or click to browse.
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2
Preview merged data
See the combined data with aligned columns.
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3
Download merged CSV
Click "Download" to get the merged CSV file.
Frequently Asked Questions
Upload multiple CSV files. They are automatically combined row by row. Columns are matched by header name.
No. Files with different columns are merged with all unique columns. Missing values are left empty.
Up to 20 CSV files at once. There is no row limit — the tool handles large datasets efficiently.
No. CSV merging runs entirely in your browser using PapaParse. Your data never leaves your device.
The output CSV uses standard comma separation. The tool auto-detects the delimiter of input files (comma, semicolon, tab) so it works with any CSV variant.
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Ready to merge csv files?
Combine multiple CSV files into one. Automatically aligns columns. Free, runs in your browser.