Open main menu

Wikipedia β

TOML is a configuration file format that is intended to be easy to read due to more obvious semantics which aims to be "minimal". TOML is designed to map unambiguously to a dictionary.

Filename extension .toml
Internet media type not registered
Developed by Tom Preston-Werner
Initial release 23 February 2013; 5 years ago (2013-02-23)
Latest release
(July 10, 2018; 7 days ago (2018-07-10))
Type of format Data interchange
Open format? Yes

"TOML", the name, is an acronym for "Tom's Obvious, Minimal Language"[1] referring to its creator: Tom Preston-Werner.

TOML is used in a number of software projects [2] and is implemented in a large number of programming languages,[3][4] despite having been flagged by its author as an unstable specification pending attainment of version 1.0.[1]

TOML is inspired by .INI file syntax, but with a more formal specification.[5]


TOML's syntax largely consists of key = "value" pairs, [section names], and #comments.

It specifies a list of supported data types: String, Integer, Float, Boolean, Datetime, Array, and Table.


# This is a TOML document.

title = "TOML Example"

name = "Tom Preston-Werner"
dob = 1979-05-27T07:32:00-08:00 # First class dates

server = ""
ports = [ 8001, 8001, 8002 ]
connection_max = 5000
enabled = true


  # Indentation (tabs and/or spaces) is allowed but not required
  ip = ""
  dc = "eqdc10"

  ip = ""
  dc = "eqdc10"

data = [ ["gamma", "delta"], [1, 2] ]

# Line breaks are OK when inside arrays
hosts = [