TOML to JSON/YAML Converter
Convert between TOML, JSON, and YAML formats. Bidirectional conversion with syntax validation.
Bidirectional Conversion
Convert TOML to JSON, TOML to YAML, JSON to TOML, and YAML to TOML. All four directions supported.
Full TOML Support
Handles tables, array of tables, inline tables, multi-line strings, dates, and all TOML data types.
Syntax Validation
Get clear error messages when your input has syntax errors. Fix issues before converting.
How to Convert TOML to JSON or YAML
- 1. Select a conversion mode (TOML to JSON, TOML to YAML, JSON to TOML, or YAML to TOML).
- 2. Paste your source content in the Input panel.
- 3. Click Convert to transform the data.
- 4. The converted output appears in the right panel. Click Copy to copy to clipboard.
Frequently Asked Questions
What is TOML?
TOML (Tom's Obvious Minimal Language) is a configuration file format designed to be easy to read. It is widely used in Rust (Cargo.toml), Python (pyproject.toml), and Hugo. TOML maps to a hash table and is more readable than JSON for configuration files.
When should I use TOML vs JSON vs YAML?
Use TOML for configuration files where readability matters (like Cargo.toml). Use JSON for data interchange between APIs and services. Use YAML for configuration that needs complex nesting (like Kubernetes manifests). Each format has its strengths.
Does TOML support comments?
Yes, TOML supports comments using the # symbol. This is a major advantage over JSON which does not allow comments. Comments in TOML start with # and continue to the end of the line.
Is my data processed on a server?
No. All conversion happens locally in your browser using JavaScript. Your configuration data never leaves your device.