Merge CSV Files
Combine multiple CSV files by stacking rows or joining columns. Free, no signup required.
Drag & drop your files here or click to browse.
Accepted: CSV — Max size: 50MB
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How to Merge CSV Files
Upload two or more CSV files and choose your merge mode. 'Stack rows' appends all rows from each file into one (useful when files have the same columns). 'Join columns' places files side by side (useful when files have different data about the same records). Download the merged CSV instantly.
Why Merge CSVs?
Data often comes in multiple CSV files — monthly reports, exported segments, or data from different sources. Merging them into a single file makes analysis, import, and sharing much simpler.
Frequently Asked Questions
For 'stack rows' mode, files with different columns will have missing values filled as empty. For 'join columns' mode, files can have any columns.