無料オンライン TXT → CSV コンバーター
完全無料、ブラウザベースのTXTファイルをCSVに変換する方法。アカウント不要、ソフトウェア不要、サーバーへのアップロード不要 — .txtファイルをドロップしてテーブルをプレビューし、CSVをダウンロードするだけ。
データのライブテーブルプレビューがここに表示されます。
100% free and private — your .txt stays on your device.
Convert TXT to CSV online, for free
Looking for a free online TXT to CSV converter with no catch? This tool runs entirely in your browser. There is nothing to install and no sign-up, and because the conversion happens on your device, your files are never uploaded.
Drop a .txt file onto the box or paste its contents. The converter detects the delimiter, splits the text into columns, and shows a live preview. Keep the output on CSV and download — or copy it straight to your clipboard.
Want the paste-focused version? See online text to CSV. Need many files at once? Use the batch converter.
How to use it
貼り付けまたはアップロード
Add your text or drop a file — it is read locally in your browser, never uploaded.
Preview & adjust
Check the live table and the row / column counts, then tweak the delimiter or options if a column looks off.
Copy or download
Grab the result with Copy or Download. You can reopen recent conversions from this device too.
Input and output example
Upload a .txt and download CSV — free and entirely in your browser.
product price
Pen 1.20
Pad 3.50product,price
Pen,1.20
Pad,3.50Why a browser-based converter is safer
無料でも自分のデータを渡す必要はありません。
Nothing leaves your device
Many “online” converters upload your file to a server to process it. This one does all parsing locally with JavaScript, so confidential lists, exports and customer data stay private. You can even use it offline once the page has loaded.
No sign-up, no limits to unlock
There is no account wall and no paid tier hiding the useful features. Delimiter detection, header handling, encoding options and Excel-safe numbers are all available immediately.
Drag, drop, done
Drag a .txt straight from your file manager, or click to browse. Pasting works too, which is handy when the text is already on your clipboard.
Still fully featured
Being free and private does not mean basic: you get the same ten output formats, live table preview, copy, download and on-device history as every other tool here.
Free without the trade-offs
“Free” online tools often recoup the cost in other ways — uploading your files, gating useful options behind an account, or wrapping the page in heavy tracking. This converter takes a different approach: it is free because it is simple, doing its work in your browser with no server to pay for and no file to store. That means there is nothing to sign up for and nothing held back; delimiter detection, header handling, encoding controls and Excel-safe numbers are all available the moment the page loads. It also means your text files stay private, which is the whole point when the data is sensitive. If you outgrow single-file conversion, the batch tool handles up to fifty files at once, and the same options carry over, so moving from one file to many does not mean relearning anything.
Free Online TXT to CSV Converter — FAQ
Is it really free?
Yes. There is no charge, no account and no feature paywall.
Are my files uploaded?
No. Conversion runs in your browser; your .txt never leaves your device.
Do I need to install anything?
No. It works in any modern browser with no extension or app.
Can I drag and drop files?
Yes, drag a .txt onto the box or click to choose it.