JSON to INI — Free Online INI Configuration File Generator

What Is the INI File Format?

INI is a configuration file format consisting of sections, keys, and values. It has no formal specification but follows de facto conventions dating back to MS-DOS (Windows 3.x win.ini, system.ini).

[database]
host = localhost
port = 3306
name = myapp_production

[server]
host = 0.0.0.0
port = 8080
debug = false

[logging]
level = info
file = /var/log/myapp.log

INI Format Structure

INI Format Rules

• Sections are declared in square brackets: [section]

• Keys and values are separated by = (or sometimes :)

• Comments start with ; or #

• Sections group related keys

• Keys must be unique within a section

• Values are always strings (no formal type system)

• Duplicate sections are typically merged by parsers

What Is JSON?

JSON (JavaScript Object Notation) is a lightweight, human-readable text format defined by RFC 8259. It supports nested objects, arrays, and typed values (strings, numbers, booleans, null).

JSON vs. INI — Key Differences

JSON-to-INI Conversion Logic

The conversion maps JSON objects to INI sections and key-value pairs:

Input JSON:

{
   "database": {
       "host": "localhost",
       "port": 3306,
       "name": "myapp"
   },
   "server": {
       "host": "0.0.0.0",
       "port": 8080,
       "debug": false
   }
}

Output INI:

[database]
host = localhost
port = 3306
name = myapp

[server]
host = 0.0.0.0
port = 8080
debug = false

Why Convert JSON to INI?

Where INI Files Are Used

Core Features

1. Dual Input Modes

• File Upload: Drag and drop or select a .json file.

• Code Editor: Paste or type raw JSON with syntax highlighting and real-time validation.

2. Automatic Section Detection

Nested JSON objects are automatically converted to INI [sections]. Top-level keys with primitive values are placed in a default section.

3. Privacy by Design

All processing runs entirely in your browser. No data is uploaded to any server.

How to Use This JSON to INI Converter

Step 1: Provide Your JSON Data

Choose one of two input methods:

• Upload a file: Click "Choose File" and select a .json file, or drag it into the upload area.

• Paste data: Click "Enter Data" to switch to the code editor. Paste your JSON. A "Valid JSON" badge confirms correct formatting.

Step 2: Convert

Click Convert. The INI output appears in the "Output Data" panel.

Step 3: Copy or Download

• Click Copy to Clipboard to paste into a .ini file.

• Premium users can click Download File to save.

Complete Example

Example — Application Config

Input JSON:

{
   "database": {
       "host": "localhost",
       "port": 5432,
       "name": "myapp_production",
       "user": "admin",
       "password": "secret",
       "pool_size": 10
   },
   "server": {
       "host": "0.0.0.0",
       "port": 8080,
       "debug": false,
       "cors_origins": "*"
   },
   "logging": {
       "level": "info",
       "file": "/var/log/myapp.log",
       "max_size_mb": 100,
       "rotate": true
   }
}

Output INI:

[database]
host = localhost
port = 5432
name = myapp_product
ionuser = admin
password = secret
pool_size = 10

[server]
host = 0.0.0.0
port = 8080
debug = false
cors_origins = *

[logging]
level = info
file = /var/log/myapp.log
max_size_mb = 100
rotate = true

Example — Flat Key-Value Config

Input JSON:

{
   "app_name": "MyApp",
   "version": "2.1.0",
   "environment": "production",
   "max_connections": 100,
   "timeout_seconds": 30
}

Output INI:

app_name = MyApp
version = 2.1.0
environment = production
max_connections = 100
timeout_seconds = 30

Example — PHP-style Configuration

Input JSON:

{
   "PHP": {
       "engine": "On",
       "short_open_tag": "Off",
       "precision": 14,
       "output_buffering": 4096,
       "max_execution_time": 30,
       "memory_limit": "256M",
       "error_reporting": "E_ALL",
       "display_errors": "Off",
       "log_errors": "On"
   },
   "Date": {
       "timezone": "UTC"
   },
   "Session": {
       "save_handler": "files",
       "save_path": "/tmp",
       "use_strict_mode": "1",
       "cookie_httponly": "1",
       "cookie_secure": "1",
       "gc_maxlifetime": 3600
   }
}

Output INI:

[PHP]
engine = On
short_open_tag = Off
precision = 14
output_buffering = 4096
max_execution_time = 30
memory_limit = 256M
error_reporting = E_ALL
display_errors = Off
log_errors = On

[Date]
timezone = UTC

[Session]
save_handler = files
save_path = /tmp
use_strict_mode = 1
cookie_httponly = 1
cookie_secure = 1
gc_maxlifetime = 3600

Example — Git Configuration

Input JSON:

{
   "user": {
       "name": "John Doe",
       "email": "[email protected]"
   },
   "core": {
       "editor": "vim",
       "autocrlf": "input"
   },
   "push": {
       "default": "simple"
   },
   "alias": {
       "st": "status",
       "co": "checkout",
       "br": "branch"
   }
}

Output INI:

[user]
name = John Doee
mail = [email protected]

[core]
editor = vim
autocrlf = input

[push]
default = simple

[alias]
st = status
co = checkout
br = branch

INI Format Limitations

Frequently Asked Questions （FAQ）

• Does the tool upload my data?

  No. All conversion happens locally in your browser using JavaScript. Your data never leaves your device.

• What is the INI file format?

  INI is a configuration file format with [sections] and key = value pairs. It is used by PHP, Python, Git, MySQL, Windows applications, and many other systems for settings and configuration.

• How does the conversion work?

  Top-level JSON keys with primitive values become key-value pairs. Nested JSON objects become INI [sections] with their keys as key-value pairs inside each section.

• Can I convert nested JSON objects?

  One level of nesting maps cleanly to INI sections. Deeply nested objects (objects within objects within objects) cannot be fully represented in INI's flat section structure.

• What happens to JSON arrays?

  Arrays are serialized as comma-separated values in the INI output.

• What happens to JSON booleans and nulls?

  Booleans become string values (true / false). Nulls become empty values.

• What input format is required?

  Valid JSON — either an object or an array. Objects produce the most natural INI output with sections.

• Is there a file size limit?

  The tool processes data entirely in your browser. Files up to 10 MB typically convert without issues on modern hardware.

• Can I use this on mobile?

  Yes. The tool is responsive and works on smartphones and tablets.