CSV to JSON Converter

Runs in your browser — your files never leave your device

Convert CSV into clean JSON right in your browser. Choose your delimiter, treat the first row as a header, and copy or download the result. Your data never leaves your device.

First row is a header

CSV

JSON

How to use it

1
Paste your CSV
Paste or type CSV into the input box. Everything stays in your browser.
2
Set the options
Choose the delimiter and whether the first row is a header.
3
Copy or download
Copy the JSON to your clipboard or download it as a .json file.

CSV into structured JSON

Paste a comma-, tab- or semicolon-separated file and get a JSON array back. With "first row is a header" on, each row becomes an object keyed by the column names; turn it off to get plain arrays. Numbers and booleans are detected automatically.

Private and instant

Spreadsheets often hold sensitive data, so this converter runs entirely in your browser — no upload, no account, no limits. Conversion is instant as you type, and the output is ready to copy or download.

Frequently asked questions

Is my CSV uploaded to a server?

No. Conversion happens entirely in your browser; your data never leaves your device.

Can I choose the delimiter?

Yes — comma, tab or semicolon. The columns are split accordingly.

How are headers handled?

With "first row is a header" on, each CSV row becomes a JSON object keyed by the header names. With it off, rows become arrays of values.

Can I convert JSON back to CSV?

Yes — switch the direction, or use the dedicated JSON to CSV converter.

Developer

JSON to CSV

Convert a JSON array of objects to CSV in your browser. Pick a delimiter and copy or download the spreadsheet instantly. Nothing is uploaded — your data stays on your device.

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