Merger · 100% Local
CSV Merger
Drop two CSV files and combine them into one. Aligns columns automatically and downloads a merged file. Nothing leaves your browser.
File APrimary file
File BFile to append
Merged CSV
Nothing leaves your browser
Both CSV files are read and merged entirely in-browser. No files are uploaded anywhere. Works fully offline.
Smart column alignment
When files have different columns, Rawsort aligns them by header name and fills missing values with empty cells.
Source tracking
Optionally add a source column so you can tell which rows came from File A and which from File B after merging.