TOML Converter

Convert TOML to JSON and back online for free. Parse and serialize TOML configs — pyproject.toml, Cargo.toml — locally in your browser.

TOML

[server]
host = "0.0.0.0"
port = 8080
tls = true

[server.limits]
max_requests = 1000
timeout_secs = 30.5

[database]
url = "postgres://localhost/db"
pool = [1, 4, 8]

JSON

{
  "server": {
    "host": "0.0.0.0",
    "port": 8080,
    "tls": true,
    "limits": {
      "max_requests": 1000,
      "timeout_secs": 30.5
    }
  },
  "database": {
    "url": "postgres://localhost/db",
    "pool": [
      1,
      4,
      8
    ]
  }
}

About TOML Converter

Convert TOML configuration files to JSON and back — useful for pyproject.toml, Cargo.toml and other TOML-based configs.

Powered by smol-toml and runs entirely in your browser; nested tables, arrays of tables, dates and dotted keys are preserved.