JSON to TOML Converter & JSON Repair Tool

Fix Invalid JSON Before Converting to TOML

Many JSON files fail to convert because of syntax errors. The built-in JSON repair feature can fix common formatting problems before TOML conversion.

• Missing quotes around property names
• Single quotes instead of double quotes
• Trailing commas and duplicate commas
• Missing commas between object properties
• Missing closing braces and brackets
• Unfinished arrays before the next object property
• JavaScript comments and JavaScript object syntax

JSON Repair Features

Before and After JSON Repair Example

Before repair:

{
  app: {
    name: 'jsonkit-api',
    enabled: true,
  }
}

After repair:

{
  "app": {
    "name": "jsonkit-api",
    "enabled": true
  }
}

How JSON to TOML Conversion Works

This converter parses JSON in your browser, validates TOML-compatible values, and writes readable TOML for config files, tooling, documentation, and DevOps workflows.

• JSON objects become TOML tables and key-value pairs.
• JSON arrays become TOML arrays when values are TOML-compatible.
• Strings, numbers, and booleans are preserved.
• TOML does not support null values, so nulls are reported clearly before conversion.

JSON to TOML Example

Input JSON example:

{
  "app": {
    "name": "jsonkit-api",
    "version": "1.0.0",
    "enabled": true,
    "ports": [3000, 3001],
    "database": {
      "host": "localhost",
      "port": 5432,
      "ssl": false
    }
  }
}

Output TOML example:

[app]
name = "jsonkit-api"
version = "1.0.0"
enabled = true
ports = [3000, 3001]

[app.database]
host = "localhost"
port = 5432
ssl = false

JSON to TOML FAQ

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