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Data & Spreadsheet Transformation Tool

Free CSV to JSON & JSON to CSV Converter

Easily convert comma-separated values (CSV) into structured JSON arrays, or convert JSON payloads back into spreadsheet-ready CSV tables with custom delimiters and privacy.

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Workflow

How To Convert Between CSV & JSON

1

Paste Table or Array

Paste data exported from Microsoft Excel, Google Sheets, SQL database dumps, or REST APIs.

2

Instant In-Browser Parse

The engine maps headers to object keys with automatic type conversion and delimiter detection.

3

Export .json or .csv

Copy the formatted output with one click or download the generated file to your local computer.

FAQ

Frequently Asked Questions

The converter adheres strictly to standard RFC 4180 CSV specifications. Any commas or quotation marks enclosed within double quotes (`"123 Main St, Apt 4"`) are preserved safely as single cell values without breaking columns.

100% confidential. All CSV parsing and JSON serialization are executed entirely inside your browser's local JavaScript memory. Your files and table data are never transmitted over the internet to any external server.

Yes. For nested child arrays or sub-objects, the converter automatically serializes them into valid JSON strings within their respective table cell, preventing data loss while maintaining clean rows.

Because processing occurs on your device, you can convert datasets with tens of thousands of rows smoothly without server timeouts or API payload limits.
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