Developer tools

CSV to JSON

Convert CSV data into formatted JSON, with a preview of the result.

Anything you type or paste stays in your browser — it is not uploaded to Tools99.

Workspace: 1. Add files2. Ready3. Working4. Done — download

How this workspace works

Paste CSV data.
Convert it to formatted JSON.
Preview the result, then copy or use it.

Your text never left this browser, so there is no server copy to delete. Copy it again, start over, or continue with a related tool below.

How to use CSV to JSON

Paste CSV data.
Convert it to formatted JSON.
Preview the result, then copy or use it.

A good use for this

Turning spreadsheet data into JSON for code, an API test, or a config file.

Limits

The first row is treated as headers, so a CSV without headers will lose its first data row into field names — check the preview before using the output.