JSON to TOML Converter
Convert JSON to TOML instantly with our free online tool.
All conversions happen in your browser. No data is sent to our servers. Press Cmd/Ctrl + Enter to convert.
How to Convert JSON to TOML
Paste your JSON content into the input panel and click Convert. The TOML output will appear instantly. You can copy the result or download it as a .toml file.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data format used extensively in web development and APIs. While great for data exchange, TOML is often preferred for configuration files due to its readability.
What is TOML?
TOML is a configuration file format designed to be easy to read and write. It has a clear, minimal syntax and maps directly to hash tables. TOML is used by Cargo (Rust), pip/poetry (Python), and many other tools.
Common Use Cases
Convert JSON to TOML when creating Cargo.toml for Rust projects, pyproject.toml for Python, or any configuration file where TOML's readability is preferred over JSON's syntax.
Frequently Asked Questions
Will the TOML output preserve my data structure?
Yes, the converter maintains the exact structure of your JSON data, converting objects to TOML tables and arrays appropriately.
Is the TOML output properly formatted?
Yes, our converter produces clean, properly formatted TOML that follows the TOML 1.0 specification.
What JSON structures work best?
TOML requires a root object (not an array or primitive). Nested objects become TOML tables, and arrays of objects become arrays of tables.
Why would I convert JSON to TOML?
TOML is more human-readable for configuration files. It's the preferred format for Rust projects (Cargo.toml), Python projects (pyproject.toml), and many CLI tools.