TOML <-> JSON Converter

TOML to JSON & JSON to TOML Converter

This free online tool provides instant, bidirectional conversion between TOML and JSON data formats. The entire conversion process runs directly in your browser, ensuring your configuration files and data remain completely private and secure. Simply paste your TOML or JSON data into either editor to convert between formats in real-time.

How do I convert TOML to JSON?

To convert TOML to JSON, paste your TOML configuration into the code editor on giga.tools and click the convert button. The tool instantly parses your TOML file and displays the equivalent JSON structure with proper formatting and indentation. This is particularly useful when working with configuration files that need to be consumed by JSON-based APIs or applications. Once converted, you can use our JSON formatter to ensure perfect readability.

How can I convert JSON to TOML?

Converting JSON to TOML is equally straightforward. Paste your JSON data into the editor, click the conversion button, and the tool will generate the corresponding TOML configuration. This is ideal when you want to create human-readable configuration files from JSON data exported by applications or APIs.

What is TOML format?

TOML (Tom's Obvious, Minimal Language) is a configuration file format designed to be easy to read and write. Created by Tom Preston-Werner, TOML uses a simple syntax with key-value pairs and supports complex data structures like arrays and nested tables. It's widely used in projects like Cargo (Rust package manager), Poetry (Python dependency management), Cloudflare Wrangler (CLI Client for the Cloudflare Workers Platform), and many modern configuration systems.

Why convert TOML to JSON?

You might convert TOML to JSON when integrating configuration data with web services, APIs, or JavaScript applications that natively consume JSON. Many backend systems and data pipelines expect JSON input, so converting from TOML enables you to use human-friendly TOML files during development while providing JSON output for production systems. If you need to convert between TOML and YAML instead, use our TOML to YAML converter.

Is this TOML <-> JSON converter safe for sensitive data?

Yes, this converter is completely secure for sensitive configuration files. Since all conversion logic runs entirely within your browser, your data is never uploaded to any server or transmitted over the internet. Your API keys, credentials, and private configurations remain on your local machine throughout the conversion process.

Does this tool validate TOML and JSON syntax?

Yes, the converter automatically validates both TOML and JSON syntax during conversion. If your input contains syntax errors—such as invalid TOML keys, malformed JSON brackets, or incorrect data types—the tool displays a clear error message to help you identify and fix the problem. This makes it function as both a converter and a validator.

Can I convert Rust Cargo.toml files to JSON?

Absolutely. This tool handles Cargo.toml files from Rust projects without any issues. Simply paste your entire Cargo.toml content into the converter, and it will generate the equivalent JSON representation of your package metadata, dependencies, and build configurations.

How do I convert Python pyproject.toml to JSON?

To convert a pyproject.toml file used by Python tools like Poetry or setuptools, paste the complete TOML content into the converter. The tool will parse all sections including project metadata, dependencies, and build system requirements, outputting properly structured JSON that maintains the hierarchy and data types from your original TOML file.

Is this TOML to JSON converter free?

Yes, the TOML <=> JSON converter on giga.tools is completely free to use. There are no sign-ups, subscriptions, usage limits, or hidden fees required to convert between TOML and JSON formats.