Merge Tables

Combine several Excel or CSV files into one table — columns line up by header name, and you can add a column that records which file each row came from. Everything runs in your browser.

Your data never leaves this browser

The file is parsed, previewed and charted on your own device. Nothing is uploaded — not even a sample. Close the tab and the data is gone.

Add at least one file to merge. Everything runs locally.

Import a file to get started. Everything runs locally.

How it works

  1. 1.Drop in two or more files at once (Excel, CSV, TSV or JSON) — every worksheet counts as one source.
  2. 2.Choose whether columns line up by header name (recommended) or by column position.
  3. 3.Tick Add a column recording which file each row came from if you want to keep track of the source.
  4. 4.Press Merge the tables, check the summary and the new columns, then export as CSV or Excel.

Frequently asked questions

Do I get free credits to try Merge Tables?
Yes — new accounts get 3 free credits to spend on any tool, Merge Tables included. After that you only pay for what you run.
How many credits does Merge Tables cost?
Everything runs in your browser and nothing is uploaded: free accounts pay 1 credit per run, and Pro or Pro+ members run it as often as they like.
Is the content I paste private?
Merge Tables uses your input only to generate the result. Stored results are deleted automatically by our retention policy, and you can remove any run from your history.
Do I need to install anything?
No. Merge Tables works in any modern browser — nothing to download or install.