Merge Text Files
Combine multiple text files (.txt, .md, .csv…) into a single document with your choice of separator. Merged locally — nothing is uploaded.
How to use Merge Text Files: Open Merge Text Files — it runs entirely in your browser with no setup. Paste or type your input into the text area, or upload a file where supported. Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server. Everything runs inside your browser, so your data never leaves your device.
Click or drop text files (.txt, .md, .csv…)
Combined locally in your browser — nothing is uploaded.
Combine multiple text files (.txt, .md, .csv…) into a single document with your choice of separator. Merged locally — nothing is uploaded. Merge Text Files is a free, browser-based tool in the Filevane text tools collection — there is nothing to install, no account to create and no watermark on your results. It works on desktop, tablet and mobile, and because the work happens on your own device it stays fast even with large inputs.
How to use Merge Text Files
- Open Merge Text Files — it runs entirely in your browser with no setup.
- Paste or type your input into the text area, or upload a file where supported.
- Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server.
- Review the output instantly; large inputs are handled locally without lag.
- Copy the result to your clipboard or download it. Your data never leaves the page.
Why use Merge Text Files?
- 100% free with no limits, no sign-up and no watermarks.
- Private by design — your data are processed in your browser and never uploaded to a server.
- Fast and lightweight, with instant results even on a phone or a slow connection.
- Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
- Part of a full text tools suite, so related merge text files tasks are one click away.
Is it private and secure?
Your privacy is built in. Merge Text Files runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.
Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.
You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.
Learn more
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Frequently asked questions
How do I merge multiple text files into one?
Drop or select the text files you want to combine, choose a separator (a blank line, a divider, or the file name as a header), then download the single merged file. It all happens in your browser.
Which file types can I combine?
Any plain-text format — .txt, .md, .csv, .log, .json and similar. The files are joined as text in the order you add them.
Can I control the order and what goes between files?
Yes. Reorder the files before merging and pick the separator inserted between each one, so the boundaries stay clear in the combined document.
Are my files uploaded to a server?
No. The files are read and merged locally with your browser's File API — nothing is sent anywhere, so even confidential documents stay on your device.
Related tools
See all free text tools or browse the full tool catalogue.