JSON to TOML Converter
Convert JSON to TOML format
Input JSON
Converted TOML
What Is JSON to TOML?
TOML (Tom's Obvious Minimal Language) is a config format used by Cargo, Poetry, and many tools. This tool converts JSON to TOML. The JSON spec and TOML spec define the formats; conversion runs in your browser. Nothing is sent to a server.
JSON to TOML Examples
Convert JSON to TOML. Telecom-themed example:
Example: Subscriber config
TOML output:
Click the Sample button above to load more examples into the editor.
How to Use This Tool
Paste or Upload JSON
Paste your JSON or upload a file. Use Sample to load an example.
Review the TOML Output
The right panel shows converted TOML. Nested objects become TOML tables.
Copy or Download
Use Copy or Download. For formatting JSON first, use the JSON Formatter. For validation, use the JSON Validator.
Where JSON to TOML Helps
When migrating config from JSON to TOML (e.g. for Python's Poetry or Rust's Cargo), paste your JSON here to get TOML. API responses in JSON can be converted for config files. For the reverse, use TOML to JSON. For YAML, use JSON to YAML.
Frequently Asked Questions
When to use TOML vs JSON?
TOML is human-friendly for config files. JSON is better for APIs and machine-to-machine data.
Is my data sent anywhere?
No. Conversion runs in your browser.