JSON to CSV Converter

Transform JSON objects into spreadsheet-ready CSV instantly. 100% Client-Side. Zero tracking.

Raw JSON Input

CSV Output

Rows Exported: 0 Output Size: 0 Bytes

🔒 PRIVACY NOTE: Your files are processed entirely within your web browser. We do not upload, store, or share your data with any servers. 100% secure and private.

How it works

A simple, smart, and completely secure local conversion tool.

Input JSON

Paste your JSON text or switch to File Upload mode to drag and drop a .json, .jsonl, or .ndjson file directly.

Choose Output Style

Flatten nested object keys for spreadsheet-friendly columns, or quote every field for maximum CSV compatibility.

Copy or Download

Click copy or download to grab your CSV instantly. Everything runs locally in your browser memory.

The Difference

JSON vs. CSV

JSON is a structured data format that supports nested objects, arrays, booleans, and null values. CSV is a flat tabular format that works beautifully with Excel, Google Sheets, and database imports.

Security First

Why convert locally?

JSON files often contain sensitive customer records, internal API responses, analytics events, or exports from private systems. File Gulp processes your JSON entirely inside your browser memory using JavaScript, ensuring zero data exposure to external servers.

How our converter works

Flexible Input: Accepts a JSON array of objects, a single JSON object, or line-by-line JSON records (JSONL / NDJSON).
Smart Headers: The converter builds CSV columns from the union of keys found across your records, preserving discovery order.
Nested Data: If enabled, nested object keys are flattened using dot notation like address.city. Arrays are safely stringified into a single CSV cell.
Proper Escaping: Commas, quotes, and line breaks are escaped according to CSV rules so your output opens cleanly in spreadsheet tools.