Prepend CSV Columns
Add new columns to the start of every row in CSV.
FreeNo uploadNo sign-up
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How to use the Prepend CSV Columns
- Type or paste your input into the Input box, or upload a text file.
- Adjust the options under the tool. The result updates as you type.
- Copy the output or download it as a file.
Private by design
The Prepend CSV Columns runs entirely in your web browser. Nothing you enter or open here is uploaded to a server, so it is safe to use with private data and works even when your connection drops after the page has loaded.
Frequently asked questions
Is the Prepend CSV Columns free?
Yes. The Prepend CSV Columns on Codegres.org is completely free, with no sign-up, no limits and no watermark.
Is my CSV uploaded anywhere?
No. The Prepend CSV Columns runs entirely in your browser using JavaScript, so your CSV never leaves your device and is not stored or seen by anyone.
Does the Prepend CSV Columns work on my phone?
Yes. It works in any modern browser on Android, iPhone, Windows, Mac and Linux, with nothing to install.