CSV Tools
CSV Merge
Combine multiple CSV files into one, aligning columns automatically.
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What is CSV Merge?
Combines multiple CSV files into a single file, aligning columns by header name even if column order differs between files.
How it works
Each file is parsed separately, column headers are unioned across all files, and missing columns are filled with blanks.
- Add CSV files. Paste 2+ CSV files. Label each file for the source column.
- Configure options. Toggle the source file tracking column.
- Get merged output. Rows from all files are stacked with aligned columns.
Examples
Monthly exports
Combine Jan.csv, Feb.csv, Mar.csv into one merged file even if column order varies.
Common mistakes
Inconsistent headers
Columns present in only one file get blank values in rows from other files.
Alternatives
CSV Deduplicator
For removing duplicates after merging.
Frequently asked questions
What if headers differ?
All unique headers across files are unioned. Missing values are left blank.