Configuration Format Conversion

TOML (Tom's Obvious Minimal Language) and JSON (JavaScript Object Notation) are both popular configuration formats with different strengths. TOML emphasizes human readability with a clear, table-based structure, while JSON provides a more compact, machine-friendly format.

Common Use Cases

Converting package manifests between language ecosystems
Migrating configuration between tools that prefer different formats
Debugging configuration issues by examining alternative representations
Learning TOML structure by comparing with equivalent JSON

Step-by-Step Instructions

Paste TOML or JSON content into the input field
Click "Convert" to transform to the opposite format
Use "Swap Direction" to toggle conversion direction
Copy or download the converted result

Examples

Simple TOML Configuration

title = "Example"
[server]
port = 8080
enabled = true
hosts = ["alpha", "beta"]

Nested JSON Structure

{
  "database": {
    "connection": {
      "host": "localhost",
      "port": 5432,
      "ssl": true
    },
    "timeout": 30.5
  }
}

Frequently Asked Questions

What TOML features are supported?

This converter handles basic key-value pairs, arrays, tables, and inline tables. Advanced features like table arrays and specific date formats may have limited support.

Are there any size limitations?

Large files are processed in chunks to prevent browser blocking. For very large configurations (10MB+), consider using dedicated offline tools.

How accurate is the conversion?

The conversion is best-effort and handles common patterns. For production use, verify results with official TOML validators and JSON parsers.

Does this tool preserve comments?

No, comments are lost during conversion as JSON doesn't support them. TOML comments are discarded when converting to JSON.

How It Works

Methodology & Limitations

TOML parsing uses recursive descent for tables and arrays
JSON conversion uses native JSON.parse/stringify with error handling
Type inference for numbers, booleans, and strings
Limited support for advanced TOML date/time formats
No preservation of comments or formatting whitespace

TOML to JSON and JSON to TOML Converter

Menu

TOML to JSON and JSON to TOML Converter

AI Assistant

Was this tool helpful?