Data analysts and backend engineers frequently need to convert spreadsheet data into JSON for API consumption, database seeding, or configuration files. Export your Excel or Google Sheets data as CSV, then paste it here to get clean JSON output with proper type inference.
Excel Export Workflow
In Excel: File → Save As → CSV (Comma delimited). In Google Sheets: File → Download → Comma Separated Values. Then paste the CSV content into this tool. Numbers are automatically detected and converted to JSON numbers (not strings), and empty cells become null.
Handling Special Characters
Excel CSV exports often contain quoted fields with commas inside them ("New York, NY"), special characters, and Unicode text. Our parser correctly handles RFC 4180 CSV format including escaped quotes ("") within fields and multi-line cell values.
Nested JSON from Flat CSV
If your CSV has columns like "address.city" and "address.state", the converter creates nested JSON objects. This dot-notation mapping is perfect for converting flat database exports into structured API response shapes.
Privacy & Security
All processing happens in your browser's local memory. Your data — whether it's API responses containing authentication tokens, Kubernetes cluster configurations, or database exports with PII — never touches any external server. JSON Studio is 100% client-side by design.