CSV to JSON
Convert CSV to JSON online in your browser without uploading your text to a server.
What this tool does
NexKit CSV to JSON converts CSV text into a JSON array of objects, entirely in your browser, using the first row as column headers and updating live as you type.
Every value is kept as plain text. Values like "007" or "00501" keep their leading zeros rather than being silently converted to numbers.
How to convert CSV to JSON
Paste your CSV text into the box, with the first row as column headers. The JSON result appears immediately and can be copied with one click.
Accuracy and limits
Correctly handles quoted fields containing commas or line breaks and doubled-quote escaping, not just simple comma-splitting.
Privacy and file handling
Your CSV text is converted entirely in your browser. It is not uploaded to NexKit servers by this tool.
Frequently Asked Questions
Is my text uploaded?
No. Your CSV text is converted locally in your browser. It is not uploaded to NexKit servers by this tool.
Will leading zeros be preserved?
Yes. Every value is kept as plain text, so values like "007" or a zip code like "00501" keep their leading zeros rather than being silently converted to numbers.
What is used as the JSON keys?
The first row of the CSV is used as column headers, which become the JSON object keys for every following row.