Convert JSON to INI Online Free
Transform JSON data into legacy-compatible INI configuration format instantly in your browser. No server upload, no signup, no limits.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts your JSON data to INI configuration format directly in your browser. INI files are widely used for application settings, Windows configuration, and legacy system configuration files. Your data stays on your device for complete privacy. Free, instant, no signup.
Convert JSON to INI
Drop your JSON file here to convert it instantly
Drag & drop your .json file here, or click to browse
Convert to INI instantly
JSON vs INI: Format Comparison
Key differences between the two formats
| Feature | JSON | INI |
|---|---|---|
| Structure | Nested objects and arrays supported | Flat key-value pairs in sections |
| Comments | Not supported in standard JSON | Supported with ; or # syntax |
| Data types | String, number, boolean, null, array, object | All values stored as strings |
| Nesting | Unlimited nested structures | Two levels: sections and key-value pairs |
| File size | Compact binary representation | Human-readable text format |
| Parsing | Fast native parsing in most languages | Simple line-by-line parsing |
| Use case | APIs, web apps, modern config files | Legacy apps, Windows config, simple settings |
When to Convert
Common scenarios where this conversion is useful
Windows application configuration
Many Windows applications and legacy software use INI files for configuration. Convert JSON settings to INI format for compatibility with older Windows programs.
Legacy server configuration
Web servers like Apache, PHP configurations, and older Linux services often use INI format. Convert JSON configs to INI for legacy system compatibility.
Simple configuration files
INI format is easier to edit by hand than JSON and doesn't require JSON parsing libraries. Convert JSON to INI for user-editable configuration files.
Migration from modern to legacy systems
When migrating from modern JSON-based configuration to older systems that only support INI, convert your existing JSON configs to the required format.
Who Uses This Conversion
Tailored guidance for different workflows
System Administrators
- Convert JSON configuration files to INI format for legacy system compatibility
- Transform JSON settings to INI for older web servers and applications that require INI configuration
Software Developers
- Convert JSON application settings to INI format when working with legacy codebases or Windows applications
- Transform JSON configuration to INI for compatibility with older libraries that only support INI parsing
Windows Developers
- Convert modern JSON configuration to INI format for Windows applications and services
- Transform JSON settings files to INI for compatibility with Windows registry-style configuration
How to Convert JSON to INI
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1
Upload your JSON file
Drag and drop your .json file onto the converter, or click to browse your files. Files of any size are supported.
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2
Automatic conversion
Your JSON is parsed and converted to INI format instantly in your browser. Nested objects become sections, arrays are handled appropriately.
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3
Download the INI result
Click Download to save your converted .ini file. The output uses standard INI formatting with clear section headers and key-value pairs.
Frequently Asked Questions
Nested JSON objects are flattened into INI sections. Each object becomes a section header [section_name], with its properties as key-value pairs below. Deeply nested objects use dot notation like [parent.child] for section names.
JSON arrays are converted to multiple INI keys with indexed suffixes. For example, an array ["a", "b", "c"] becomes key_0=a, key_1=b, key_2=c. This preserves all array data in INI format.
Yes. INI values containing equals signs, semicolons, or hash symbols are properly quoted or escaped to prevent parsing issues. String values with special characters are automatically quoted.
Yes. Since conversion runs in your browser, file size is limited only by available memory. However, very large nested JSON structures may result in complex INI files that are harder to read.
INI format only supports string values, so all JSON data types (numbers, booleans, null) are converted to their string representations. Boolean true becomes "true", numbers become their string equivalent.
Boolean values are converted to strings: true becomes "true", false becomes "false". JSON null values are converted to an empty string or "null" depending on the specific requirements.
No. The entire conversion happens in your browser using JavaScript. Your JSON data never leaves your device, making it safe for sensitive configuration files.
The conversion preserves all data but is not perfectly lossless due to INI format limitations. Complex nested structures are flattened, and all values become strings. The INI file contains all original data but in a restructured format.
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