By Team Hypomnema · Data & spreadsheets
Stack CSV files by matching headers or join two tables by key, with inner, left and full joins.
Use the guide alongside the working tool.
Open CSV Merger & Joiner →A workflow to try
Stack monthly sales exports whose columns are in different orders, or join an orders table to a customer table using Customer ID.Use your own input and inspect the actual preview and exported result before sharing.
When to use CSV Merger & Joiner
Stack CSV files by matching headers or join two tables by key, with inner, left and full joins.
Stack monthly sales exports whose columns are in different orders, or join an orders table to a customer table using Customer ID.
Prepare, review and export
Open two to eight tables together.
Stack rows with aligned headers, or join the first two tables using selected key columns.
Choose matching rules, prepare the result and inspect it before downloading.
Limits that affect the result
5 MB combined; output limited to 25,000 rows, 64 columns and 200,000 cells. Joins use the first two opened tables; duplicate keys produce all matching combinations, including matching empty keys.
Ready to apply this workflow?
Try CSV Merger & Joiner →Explore a related workflow
- CSV Duplicate Remover: A Practical Guide
Remove duplicate rows using selected keys, keep first or last matches and review removed rows separately.
- CSV Compare: A Practical Guide
Compare two CSV exports by unique key and report added, removed and changed records with before/after values.
- CSV Splitter: A Practical Guide
Split a CSV into row-sized parts or groups by a column, keeping headers in every downloaded file.
- CSV Editor: A Practical Guide
Edit CSV cells and headers, sort rows, undo changes and export CSV, XLSX or JSON locally.
Keep your original files and review the result. Found unclear instructions? Contact Team Hypomnema.