Data & Tables
Table Merger
Merge tables online by appending rows or joining on matching columns locally in your browser without uploading data.
Tool
Merge tables online by appending rows or joining on matching columns locally in your browser without uploading data.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this Table Merger to combine two compatible tables in the browser. The tool appends rows with matching columns or join tables by a selected key column, showing unmatched rows and duplicate keys clearly. It is designed for careful local merges where users need to see conflicts before exporting the combined result.
Examples
- Table A id,name,email 1,Ada,[email protected] 2,Ben,[email protected] Table B id,plan,renewal 1,Pro,2026-09-01 2,Starter,2026-10-15
Frequently Asked Questions
Is my table data uploaded to a server?
No. The tool parses, transforms, previews, and exports data locally in your browser without uploading your input.
Can tables be merged by a key column?
Yes. The merger supports joining by matching keys and should report missing, duplicate, or unmatched keys.
What if columns do not match?
For appending, missing columns can be created with empty values. For joins, conflicting column names should be renamed or reviewed before export.
Does the merger change the source tables?
No. It should create a combined result while keeping the original inputs available during the session.
What file sizes are practical in the browser?
Small and medium tables are the best fit. Very large files can use a lot of memory because parsing, previews, and exported results all live inside the browser tab.