JSON to TOML Converter
Convert JSON to TOML format
Input JSON
Converted TOML
What is JSON to TOML Converter?
Need to convert your JSON (JavaScript Object Notation) to TOML (Tom's Obvious, Minimal Language)? This tool does that instantly. TOML is a human-readable configuration format that's perfect for config files, while JSON is standard for APIs. Convert between them whenever you need.
According to MDN Web Docs, both JSON and TOML are popular data formats. TOML is often used in config files (like Cargo.toml for Rust, pyproject.toml for Python, or package.json alternatives), while JSON is standard for APIs. Our converter handles the conversion perfectly, preserving all your data structure.
Everything happens in your browser – your data stays private. Convert, download, and use your TOML file right away.
What Makes This Tool Different
Automatic Conversion
Paste JSON and get TOML instantly. We handle all the syntax differences – quotes, brackets, commas – everything gets converted correctly.
Structure Preservation
Your data structure stays intact. Nested objects, arrays, and all values are preserved exactly as they were in JSON.
Validation Built-In
We validate your JSON first, so you know the conversion will work. Invalid JSON gets caught before conversion starts.
File Upload Support
Got a big file? Just upload it. Works great for converting those massive JSON configs or API responses without copy-pasting.
Download TOML
One click to download your TOML file. Drop it into your project, use it in Cargo.toml, pyproject.toml, or any TOML-based config.
Syntax Highlighting
Beautiful syntax highlighting for both JSON input and TOML output. Visual feedback helps you verify the conversion looks right.
How It Works
Paste or Upload JSON
Paste your JSON into the left editor, or click "Upload" to load a file. The JSON should be valid – objects, arrays, nested structures all work. You can also click "Sample" to see an example.
Automatic Conversion
As soon as you paste, the converter processes your JSON and displays the TOML output on the right. All your data structure is preserved, just in TOML format now.
Download or Copy
Click "Download" to save the TOML file, or "Copy" to copy it to your clipboard. The TOML is ready to use in your config files or applications.
When You'd Actually Use This
Rust Projects
Convert JSON configs to TOML for Cargo.toml files. TOML is the standard format for Rust project configuration, and this tool makes it easy to convert JSON data into TOML format.
Python Projects
Convert JSON to TOML for pyproject.toml files. Many Python tools now use TOML for configuration, and this converter helps you migrate from JSON.
Config File Migration
Migrating from JSON configs to TOML? This tool makes it easy. Convert your existing JSON configuration files to TOML format quickly.
Tool Compatibility
Some tools require TOML format. Convert your JSON data to TOML when working with tools like Cargo, Poetry, or other TOML-based systems.
Common Questions
Is my JSON data stored?
Nope. Everything happens right in your browser. Your JSON never leaves your computer – we don't even see it.
What JSON formats work?
The converter works with any valid JSON structure – objects, arrays, nested objects, and mixed types. It analyzes the structure and converts it to equivalent TOML.
How are nested objects handled?
Nested objects become TOML tables (sections). Arrays stay as arrays, and all data types (strings, numbers, booleans, null) are preserved correctly.
Can I convert TOML back to JSON?
Yep. Use our TOML to JSON converter to convert TOML files back to JSON format.
What if my JSON has special characters?
Special characters are properly handled in TOML. Strings with quotes or other TOML syntax characters are escaped correctly.
Does it work with large datasets?
Yep. Since everything happens in your browser, it depends on your device. Small to medium JSON structures convert instantly. Really huge structures might take a few seconds.
Other JSON Tools You Might Need
Conversion is just one JSON task. Here are other tools that work well together:
Need to learn more about JSON? Check out the official JSON.org website or the comprehensive guide on MDN. For TOML, check out TOML.io.