JSON to TOML Converter — Convert JSON Config to TOML Format

What is TOML?

TOML (Tom's Obvious Minimal Language) is a configuration file format designed to be human-readable and unambiguous. It is the primary config format for Rust (Cargo.toml), Python (pyproject.toml), and Hugo static sites.

JSON vs TOML: Key Differences

Comments: TOML supports # hash comments; JSON does not
Dates: TOML has a native datetime type; JSON uses strings
Readability: TOML uses flat dot-notation sections; JSON uses nested braces
Use case: JSON for APIs and data; TOML for configuration files

When to Use JSON to TOML Conversion

Migrating a Node.js package.json config to pyproject.toml
Building a Rust package and needing to write Cargo.toml from JSON specs
Converting Hugo or Zola site configuration between formats

Frequently Asked Questions

Can I use this to generate Cargo.toml from JSON?

Yes. Paste your package metadata JSON and the converter produces TOML suitable for Cargo.toml (manual tweaking of [dependencies] format may be needed).

Does TOML support nested objects like JSON?

Yes, via [section.subsection] syntax and inline tables { key = "value" }.

What is the TOML equivalent of a JSON array?

TOML arrays use the same square bracket syntax: tags = ["rust", "web", "api"]. Arrays of tables use [[tablename]] syntax.

JSON to TOML: Convert JSON to TOML for Rust, Python & Go