TOML to JSON Converter Online
Convert TOML configuration files to JSON format instantly.
Processed locally in your browserTOML
Drag & drop a file here, or
Max 5MB
JSON
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Features
- ✓Real-time TOML to JSON conversion
- ✓Built-in example presets (Cargo.toml, pyproject.toml)
- ✓TOML validation with error details
- ✓Customizable JSON indentation
- ✓File upload and download support
Frequently Asked Questions
- What is TOML?
- TOML (Tom's Obvious Minimal Language) is a configuration file format that is easy to read and write. It is commonly used in Rust (Cargo.toml), Python (pyproject.toml), and Hugo projects. TOML maps unambiguously to a hash table and is designed to be minimal and obvious.
- How do I convert TOML to JSON?
- Paste your TOML content into the left panel, and the JSON output will appear instantly on the right. You can also upload a .toml file or select one of the built-in presets (Cargo.toml, pyproject.toml, Hugo config) to see the conversion in action.
- Is TOML better than JSON for configuration?
- TOML is often preferred for configuration files because it supports comments, is more human-readable, and has a cleaner syntax for nested structures. JSON is better for data interchange and API communication. Many modern tools like Rust's Cargo and Python's pip use TOML for configuration while using JSON for data.
- Does this tool validate my TOML?
- Yes, the converter validates your TOML in real-time. A green "Valid" badge appears when the TOML is correctly formatted, and specific error messages with line numbers are shown when there are syntax errors.
- Is my data secure?
- Absolutely. All TOML parsing and JSON conversion happens entirely in your browser using JavaScript. No data is transmitted to any server. Your configuration files stay on your device.