CSV ⇄ JSON Converter
Convert between CSV and JSON in your browser. Handles quoted fields and commas.
About CSV and JSON
CSV is a plain text format with delimited fields, while JSON is a structured data format. This tool converts between them entirely in your browser.
About this CSV ⇄ JSON Converter
Convert between CSV and JSON in your browser. Paste CSV to get JSON (e.g. array of objects), or paste JSON to get CSV. Handles quoted fields, commas inside values, and custom delimiters. Perfect for data migration, API integration, or spreadsheet workflows. No data is sent to servers.
Key Features
Convert CSV to JSON (array of objects)
Convert JSON to CSV
Handles quoted fields and commas in values
Custom delimiter option
First row as headers for CSV→JSON
Copy result to clipboard
Works entirely in your browser
How to Use
Paste CSV or JSON into the input area
For CSV→JSON: ensure first row is headers
For JSON→CSV: use array of objects with consistent keys
Adjust delimiter if your CSV uses semicolon or tab
Click Convert and copy the result
Popular Use Cases
Import CSV into apps that expect JSON
Export JSON API results to CSV for Excel
Transform data between systems
Generate CSV from configuration or logs
Prepare data for databases or spreadsheets
Debug or inspect CSV/JSON structure
Tips & Best Practices
CSV with commas inside fields must have those fields in quotes
JSON should be an array of objects; keys become CSV column headers
For tab-separated values, choose tab as delimiter
Large files may take a moment; processing is all client-side
Frequently Asked Questions
How are CSV headers handled?
For CSV to JSON, the first row is treated as property names; each following row becomes an object with those keys. For JSON to CSV, object keys become the header row.
What if my CSV uses semicolons instead of commas?
Use the delimiter option to select semicolon (or tab). The converter will split rows using your chosen delimiter.
Can I convert nested JSON to CSV?
The tool works best with flat JSON (array of objects with simple values). Nested objects or arrays are typically stringified; for complex nesting you may need to flatten first.
Is my data sent to a server?
No. Conversion runs entirely in your browser. Your CSV and JSON never leave your device.
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