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Text File Merger

100% Client-Side

Merge multiple text, markdown, CSV, or code files into a single consolidated document with customizable separators and file headers.

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Drop multiple text or code files here .txt, .md, .csv, .json, .js, .log — select multiple files

Separator Between Files:

Merged Document Preview

How to Use Text File Merger

Upload Files

Select or drop multiple text files (Markdown, CSV, TXT, code).

Set Separator

Choose double newlines, markdown horizontal rules, or file name headers.

Download Merged File

Export the combined master document in a single click.

✓ Multi-File Dropzone

Accepts dozens of files simultaneously and organizes them in an editable list.

✓ Header Tags

Optionally prefixes each merged section with === File: filename === for clarity.

✓ Zero Server Storage

Confidential source code and server logs are combined purely in browser memory.

🔒 Complete Client-Side Isolation

This tool runs entirely in your local browser runtime. No logs, analytics tracking, or remote server transmissions occur.

Upload or paste CSV spreadsheet data to view, search, and inspect records in a clean, responsive data table with zero server uploads.

Convert CSV spreadsheet tables into structured JSON arrays of objects with automatic header mapping and data type detection.

Convert JSON arrays of objects into RFC 4180 compliant CSV files with automatic key union and quotation escaping in your browser.