CSV ↔ JSON Converter

Convert between CSV and JSON in both directions. Paste CSV (first row = headers) or a JSON array of objects to convert.

About this tool

CSV (comma-separated values) and JSON are both used for tabular data. CSV is simple and works in spreadsheets; JSON is common in APIs and code. This tool converts CSV to a JSON array of objects (first row = keys) and vice versa, so you can move data between systems or formats.

How to use

For CSV to JSON: paste CSV with headers in the first row, then click CSV → JSON.
For JSON to CSV: paste a JSON array of objects (same keys in each), then click JSON → CSV.
Copy the result for use in your app or spreadsheet.

When to use this tool

Converting API response arrays to CSV for Excel or Google Sheets.
Turning spreadsheet exports (CSV) into JSON for scripts or APIs.
Migrating data between systems that use different formats.
Preparing sample data: CSV for spreadsheets, JSON for code.

Tips

CSV with commas inside values should be quoted; our parser assumes simple comma-separated columns. Complex CSV may need a dedicated library.
JSON to CSV uses the keys of the first object as column headers. All objects should have the same keys for consistent columns.

FAQ

My CSV has commas inside a cell—what do I do?: This tool uses a simple split on commas. If your CSV has quoted fields with commas, the conversion may be wrong. Use a proper CSV parser or escape commas before pasting.
Can I convert nested JSON?: The tool expects a flat array of objects. Nested objects or arrays will be stringified into a single column. Flatten your JSON first for best results.