AllDevUtils

TOML to JSON Converter

TOML to JSON Converter

About TOML to JSON Converter

Convert TOML to JSON and JSON to TOML online with our free converter. Transform configuration files, migrate between formats, and validate TOML syntax. Ideal for Cargo.toml, pyproject.toml, and Hugo configs.

Example

Input (TOML)

[server]
host = "localhost"
port = 8080

Output (JSON)

{
  "server": {
    "host": "localhost",
    "port": 8080
  }
}

Why Use TOML to JSON Converter?

  • Convert config files — Transform TOML configs to JSON for tools that require JSON.
  • Migrate between formats — Switch between TOML and JSON for different project needs.
  • Validate TOML syntax — Catch parsing errors and invalid structure before deployment.

TOML to JSON Converter FAQs

What is TOML?

TOML (Tom's Obvious Minimal Language) is a configuration file format designed to be easy to read. It is used by tools like Cargo (Rust), pyproject.toml (Python), and Hugo.

When should I use TOML over JSON?

TOML is better for human-edited configuration files because it supports comments, is less verbose, and has a cleaner syntax for nested structures. JSON is better for data exchange between systems.

Does this tool preserve comments?

No. Comments are a TOML feature that has no equivalent in JSON. When converting TOML to JSON, comments are stripped. Converting back to TOML will not restore them.

Where is TOML commonly used?

TOML is the default configuration format for Rust (Cargo.toml), Python (pyproject.toml), and Hugo. It is designed to be easy to read and map to a hash table.

What are the differences between TOML and YAML?

TOML uses explicit key-value pairs and tables, making it less ambiguous than YAML. YAML supports more complex data structures but is sensitive to indentation errors.