CSV merger that lines up mismatched columns by header, browser-only
This article describes a browser-only tool designed to merge two or more CSV files, intelligently aligning mismatched columns by their header names. The tool ensures data integrity by filling in blanks for missing columns rather than shifting data, and operates entirely on the user's device without uploading any files.
Why it matters
This tool offers a secure and efficient solution for data manipulation, particularly useful for users who need to combine datasets with varying structures without compromising privacy or requiring server-side processing.
Drop two or more CSV files and download them combined into one - mismatched columns line up by name, with blanks filled in rather than data shifted into the wrong column. Nothing is uploaded.
Up to 20MB per file. Stays on this device.
Nothing is sent anywhere. Turn off your Wi-Fi and this page still works - try it.
Two files with different columns, combined into one table. A missing column becomes a blank cell, not a misaligned row.
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