🔧 JSON to CSV Converter — Free, Private, Browser-Only
Paste a JSON array of objects and get a ready-to-use CSV. Nested objects become dot-notation columns. Nothing is uploaded.
Input
Result
Private by design. This tool runs entirely in your browser — nothing you enter or add is uploaded to any server.
How it works
- Paste a valid JSON array of objects into the input box.
- Click Convert to CSV. Nested objects are flattened using dot notation.
- Copy the result or use it in a spreadsheet. All processing stays in your browser.
Examples
- Convert an API response array into a CSV for Excel or Google Sheets.
- Flatten nested user records so address.city becomes its own column.
- Prepare data for import into a database or analytics tool.
Frequently asked questions
Does my JSON get uploaded?
No. Conversion runs entirely in your browser. Your data never leaves your device.
What JSON format is expected?
An array of objects, for example [{"name":"Ada","age":36}]. Nested objects are flattened.
How are nested fields handled?
Objects become columns with dot notation such as address.city. Arrays are stringified.
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