What happens to deeply nested JSON?

Keys nested beyond one level are flattened using dot notation (e.g., server.host.port becomes host.port inside the [server] section).

Are arrays supported in INI?

INI has no native array syntax. Array values are serialized as a JSON-encoded string on one line so no data is lost, though some INI parsers may not interpret them automatically.

What about null values?

null is written as an empty string (key=) in the INI output, which is the most widely accepted representation.

Are boolean values preserved?

Yes. true becomes true and false becomes false in the INI output, matching the convention used by Python configparser and most modern parsers.

Is the conversion lossless?

For objects with string, number, boolean, and null values the conversion is lossless. Complex nested structures beyond two levels are flattened, which may require manual adjustment.

JSON to INI Converter

Name: JSON to INI Converter
Availability: InStock
Author: Nham Vu

Paste JSON and instantly get a well-formatted INI configuration file with sections derived from top-level object keys.

JSON Input

INI Output

Options: Add section comments Quote string values Sort keys alphabetically

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Summary

Paste JSON and instantly get a well-formatted INI configuration file with sections derived from top-level object keys.

How it works

Paste or type a JSON object into the input panel on the left.
Top-level string/number/boolean values are written as global key=value pairs.
Top-level object values become INI sections ([section]).
Nested objects inside sections are flattened with dot notation.
Click "Copy INI" to copy the result to your clipboard.

Use cases

Convert application settings stored as JSON into INI config files.
Migrate configuration between tools that read different formats.
Generate .ini files for PHP, Python, Windows apps, or game configs.
Quickly inspect how a JSON structure maps to INI sections.
Produce INI files for CI/CD pipelines from JSON environment definitions.

Frequently Asked Questions

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Last updated: 2026-05-23 · Reviewed by Nham Vu