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How the merger works

How to merge multiple TXT and CSV files into one?

Select or drag & drop the files you need into the tool, choose a separator (new line, comma, semicolon, or custom), and click Merge. Everything happens right in your browser — no data is sent to a server.

Is it safe to merge files online?

Yes, completely. All processing is done locally in your browser — no file ever leaves your device. Your data confidentiality is guaranteed, and no information is shared with third parties.

How to use

  • 1

    Select files

    Click the area or drop multiple .txt/.csv files to load them into your browser.

  • 2

    Choose separator

    Pick a separator to insert between files (newline, comma, etc.).

  • 3

    Check order

    Files are merged in the order they were added. Reset and re-add to change order.

  • 4

    Merge

    Click "Merge & Download" — the browser will build and download the resulting file.

  • 5

    Verify output

    Open the downloaded file to verify separators and encoding.

FAQ