JSON to CSV Converter

Convert a JSON array of objects to CSV format. Auto-generates headers from keys, flattens nested objects, and lets you download as a .csv file. Free, private, no uploads.

JSON Input
CSV Output
Enter a JSON array of objects above. CSV output updates automatically.

How It Works

1

Paste JSON Array

Enter a JSON array of objects (e.g. [{"name":"John"},{"name":"Jane"}]). The tool validates your JSON instantly.

2

Choose Flatten Option

Toggle “Flatten nested objects” to convert nested fields like address.city into dot-notation column headers.

3

Review CSV Preview

The CSV output updates automatically with headers as the first row. The status bar shows the number of rows and columns.

4

Download or Copy

Click “Download CSV” to save the result or “Copy CSV” to copy it to your clipboard for use in spreadsheets.

About JSON to CSV Converter

This converter transforms a JSON array of objects into a properly formatted CSV (Comma-Separated Values) file. It automatically extracts all unique keys across every object to build the header row. Nested objects can be flattened using dot notation (e.g. address.city) for cleaner columns, or left as serialized JSON strings. Values containing commas, double-quotes, or newlines are properly escaped per RFC 4180. All processing happens entirely in your browser — no data is uploaded to any server. Use the result directly in Excel, Google Sheets, or any CSV-compatible application.

Auto-Generated Headers

Headers are extracted from all unique keys across every object in the array. Deeply nested paths use dot notation when flattening is enabled.

Nested Object Support

Flatten nested objects into dot-notation columns, or keep them as JSON strings within a single cell. Handles arrays, booleans, numbers, and null values.

Proper CSV Escaping

Fields containing commas, double quotes, or newlines are automatically wrapped in double quotes with internal quotes escaped according to RFC 4180.

100% Private & Free

All processing is done in your browser with pure JavaScript. No server uploads, no data leaves your device. Works offline after page load.

📋 Common Use Cases

Data Integration

Convert CSV exports to JSON for API development, or JSON to CSV for spreadsheet analysis. Bridge data formats without writing conversion scripts.

Document Conversion

Transform documents between formats for compatibility — DOCX to PDF for sharing, HTML to Markdown for CMS migration, or images to JPG for web optimization.

Development Workflow

Convert between data serialization formats during development. Transform API responses, config files, or test data between JSON, XML, and CSV.

Content Migration

Move content between platforms by converting to the required format. HTML to Markdown for static site generators or Markdown-ready CMS platforms.

🪜 How to Use This Tool

  1. Upload or paste your source file
    Drag and drop a file or paste your data directly. Most converters accept files up to 50MB and auto-detect the input format.
  2. Set conversion options
    Choose output format, quality settings, delimiter preferences, or encoding options depending on the converter type.
  3. Convert and preview
    Click convert and review the output. Text-based converters show a live preview; file converters display the output file details.
  4. Download the result
    Click download to save the converted file to your device. Your original and converted files are never uploaded to any server.

📚 Related Guides

Frequently Asked Questions

Are these converters free?▼
Yes. All converters are completely free. No signup needed.
How accurate is the unit converter?▼
It uses standard conversion factors for length, mass, temperature, area, volume, and speed. Results are precise to 6 decimal places.