Convert CSV to JSON Online (Header Detection)
Convert CSV to JSON (array of objects) with header detection, in your browser.
🔒 100% client-side — no data sent
Convert a CSV file to JSON (an array of objects) in one click, with automatic header detection. Conversion runs 100% in your browser, so your data is never sent to a server. Perfect for turning a spreadsheet export into usable JSON.
What is it for?
- ▸ Turn an Excel or Google Sheets export into JSON
- ▸ Prepare CSV data for an API or a NoSQL database
- ▸ Convert a CSV table into an array of objects for JavaScript
- ▸ Inspect and clean tabular data before import
FAQ
How do I convert a CSV to JSON?
Paste or drop your CSV content into the tool: the first row is detected as the header and each following row becomes a JSON object whose keys match the columns. You instantly get an array of objects ready to copy.
Is my CSV file uploaded anywhere?
No. Processing happens entirely in your browser with JavaScript. No data is sent to or kept on a server, so you can convert confidential files without any risk of leakage.
Does the tool handle commas inside values and quotes?
Yes. The parser respects quoted fields, including when they contain commas or line breaks, following the standard CSV format. Headers are detected automatically to name the keys.