Convert your TOML configuration files to structured JSON format. Parse TOML data from Cargo.toml, pyproject.toml, and other config files into valid JSON.
JSON output will appear here...
About TOML to JSON Converter
The TOML to JSON Converter by TooliFyra is a free online tool that parses TOML (Tom's Obvious Minimal Language) configuration data and converts it to JSON format. JSON is the most widely used data interchange format on the web, making this conversion essential when you need to process TOML configuration data in web applications, APIs, or scripts that expect JSON input.
How to Use
Paste your TOML data into the left textarea, including any table sections and key-value pairs.
Click "Convert to JSON" to parse the TOML and generate JSON output.
Review the formatted JSON in the right panel with proper indentation.
Copy the JSON output to use in your applications, APIs, or data pipelines.
Key Features
Full TOML ParserHandles sections, subsections, dotted keys, inline tables, and multi-line strings.
Formatted JSONOutputs properly indented, human-readable JSON with syntax highlighting.
Type DetectionAutomatically detects and converts TOML types including strings, integers, floats, booleans, dates, and arrays.
Nested TablesCorrectly parses [table.subtable] syntax into deeply nested JSON objects.
Error HandlingProvides clear, descriptive error messages when TOML syntax is invalid.
Client-Side ProcessingAll parsing happens in your browser. Your configuration data never leaves your device.
Benefits of Using Our Converter
Manually converting TOML to JSON is prone to errors, especially with complex nested structures and various TOML data types. Our converter handles all the complexity for you, producing valid JSON output every time. This is particularly useful when integrating configuration data from Rust, Python, or Go projects into JavaScript or Node.js applications that expect JSON.
Use Cases
Web DevelopersConvert TOML configs from backend projects to JSON for use in frontend build tools and frameworks.
DevOps EngineersTransform TOML configuration files into JSON for automation scripts and infrastructure management.
Full-Stack DevelopersBridge the gap between backend TOML configs and frontend JSON requirements in full-stack projects.
Data EngineersParse TOML metadata files into JSON for data pipeline configuration and orchestration tools.
Why Choose TooliFyra?
TooliFyra provides free, reliable developer tools that work directly in your browser. Our TOML to JSON converter handles edge cases that other converters miss, including multi-line strings, inline tables, and dotted keys. The tool is completely free with no sign-up required, and all processing happens client-side to protect your data privacy.
Frequently Asked Questions
The converter supports sections, subsections, dotted keys, inline tables, multi-line strings, arrays, and all standard TOML data types including dates and times.
Yes, you can paste the contents of any TOML file including pyproject.toml, Cargo.toml, or any other TOML configuration file for conversion.
If the TOML syntax is invalid, the tool displays a descriptive error message indicating where the parsing issue occurred so you can fix it.
Yes, the output is always valid, properly formatted JSON that can be parsed by any JSON parser or used directly in JavaScript applications.