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How the merger works

This tool reads the content of selected .txt and .csv files in your browser and composes a single text file. Processing is done client-side so your files are never uploaded to a server.

Supports drag & drop and multi-file selection. Choose a separator between files (newline, comma, or a custom line). For best results ensure files are encoded in UTF-8.

The merged output is convenient for data processing, backups or preparing lists for import into other systems without extra tooling.

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