Free & Secure JSON Tool

Convert JSON to CSV & Excel Instantly

The professional developer's choice for flattening complex JSON structures, cleaning data, and parsing CSV files. All processing happens 100% in your browser for complete privacy.

Launch ConverterLearn More
json.ziaratechqlabs.in/converter
input.json
{
"users": [
{
"id": 1,
"name": "Alex",
"role": "Admin",
"active": true
},
{
"id": 2,
"name": "Sarah"
}
]
}
output.csv
id
name
role
active
1
Alex
Admin
true
2
Sarah
-
-
Export Ready
Local Processing
Blink Speed
Enterprise Secure
Works Offline
Smart Processing

Flatten Nested JSON
Without Writing Code

Say goodbye to complex Python scripts or manual data entry. Flattiq automatically detects nested objects and arrays in your JSON data and flattens them into a clean, tabular format ready for Excel or Google Sheets.

  • Handles deep nesting with dot notation support
  • Respects array structures automatically
  • Preserves data types during conversion
  • Instant preview before download
// Input: Nested JSON
{
  "user": {
    "id": 123,
    "name": "Sarah",
    "address": {
      "city": "New York",
      "zip": "10001"
    }
  }
}
// Output: Flattened CSV
user.id, user.name, user.address.city, user.address.zip
123, Sarah, New York, 10001

100% Client-Side Execution

Your data never leaves your browser. Not even a single byte is sent to our servers.

Enterprise Grade Privacy

Security That You Can
Trust Completely

In an era of data breaches, why risk uploading your sensitive JSON files to unknown servers? Flattiq processes everything locally using advanced JavaScript engines right in your browser.

No Database

We don't have a database to store your files even if we wanted to.

Fast Execution

Zero latency from network transfers. Large files process instantly.

How It Works

1

Paste or Upload

Paste your JSON code directly or upload a .json file from your computer.

2

Configure

Choose specific fields, handle nested arrays, and clean up empty rows.

3

Export

Download your converted data as CSV or Excel immediately.

Why Choose Flattiq?

Built for developers, data analysts, and anyone who needs clean data fast.

100% Private

Your data never leaves your device. We process everything locally in your browser.

Blazing Fast

No upload/download wait times. Large files are processed instantly using your CPU.

Smart Flattening

Automatically handles deep nesting and arrays so you don't have to manually restructure data.

Developer Ready

Clean output format, accurate data types, and instant JSON validation.

Frequently Asked Questions

Everything you need to know about the tool.

Is it really free?
Yes, Flattiq is completely free to use for unlimited conversions. We support the tool via non-intrusive ads.
Is my data safe?
Absolutely. Unlike other converters, we process your files entirely within your web browser. Your data never passes through our servers, ensuring complete privacy.
What formats are supported?
Currently, we support converting JSON to CSV, JSON to Excel (XLSX), and CSV/Excel back to JSON. We are constantly adding support for more formats.
Can I handle large files?
Since processing is local, performance depends on your device's memory. generally, files up to 50MB-100MB work smoothly on modern computers.

Ready to simplify your data?

Join thousands of developers who save hours on data formatting tasks every day.

Start Converting Now