Web Tools
TOML to JSON Converter
Convert TOML configuration files to JSON with configurable indentation, key sorting, and null stripping. Supports tables, arrays of tables, inline tables, strings, integers, floats, booleans, and datetimes. Real-time conversion with error reporting. Runs entirely in your browser — your data never leaves your machine.
toml json converter config cargo format
Published June 1, 2026
All interactive tools run entirely in your browser. Your data never leaves your device.
How It Works
Paste TOML content and get instant JSON output. The converter parses TOML using a built-in parser and serializes to JSON with your preferred formatting options. All processing runs entirely client-side.
Features
- Real-time conversion: JSON updates as you type TOML
- 4 indent options: minified, 2 spaces, 4 spaces, 8 spaces
- Sort keys: alphabetically sort object keys recursively
- Strip nulls: remove null values from output
- Built-in examples: basic config, Cargo.toml, array of tables
- Error reporting: clear error messages for invalid TOML
- Statistics: input/output line counts and key counts
- Copy support: one-click copy of JSON output
- Private: runs entirely in the browser — no data transmitted
Use Cases
- Rust development: convert Cargo.toml to JSON for tooling
- Configuration migration: move from TOML to JSON format
- CI/CD pipelines: transform config files between formats
- Data inspection: view TOML data in JSON structure
- API integration: convert TOML configs to JSON for API consumption