.TOML

.TOML File Extension

Learn what a .toml file is, what it is used for, which programs can open it, and how to convert or troubleshoot this file format.

Data File Extension Guide 283 Searches
.TOML
Tom's Obvious, Minimal Language

Quick Facts

Basic information about this file format

Extension
.TOML
File Type
Tom's Obvious, Minimal Language
Category
Data
Best first step
Use compatible software

Quick Summary

A practical overview of the .toml file format

TOML is a configuration file format that is easy to read due to its simple syntax. It is designed to be easily parsed into data structures. TOML aims to be minimal, so it is easy to learn and use. It is often used for configuration files because it is more human-readable than formats like JSON or X…

File extension .TOML
File type Tom's Obvious, Minimal Language
Category Data
Recommended action Open with a trusted compatible app

How to open a .toml file

Start with a trusted app that supports this format

  • Check the file extension carefully and confirm that the file name really ends with .toml.
  • Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
  • Update the application if the file was created by a newer version of the software.
  • Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.

What is a .toml file?

File extension details and usage information

TOML is a configuration file format that is easy to read due to its simple syntax. It is designed to be easily parsed into data structures. TOML aims to be minimal, so it is easy to learn and use. It is often used for configuration files because it is more human-readable than formats like JSON or XML, while still being machine-parsable. TOML files are typically used to store configuration settings for software applications, data serialization, and other similar purposes. The format is designed to be unambiguous and easy to understand, even for people who are not familiar with programming. TOML is case-sensitive and uses a simple key-value pair structure, with support for tables (sections) and arrays. It supports various data types, including strings, integers, floats, booleans, dates, and arrays. The syntax is designed to be straightforward and intuitive, making it a popular choice for configuration files in many modern software projects.

Software Compatibility

Programs that may open or work with .toml files

Windows

Compatible applications

Notepad++ (with TOML plugin) Compatible
Sublime Text (with TOML package) Compatible
Visual Studio Code (with TOML extension) Compatible
Atom (with TOML package) Compatible
Any text editor Compatible

macOS

Compatible applications

TextEdit Compatible
Sublime Text (with TOML package) Compatible
Visual Studio Code (with TOML extension) Compatible
Atom (with TOML package) Compatible
BBEdit Compatible
Any text editor Compatible

Linux

Compatible applications

gedit Compatible
Sublime Text (with TOML package) Compatible
Visual Studio Code (with TOML extension) Compatible
Atom (with TOML package) Compatible
vim Compatible
nano Compatible
Any text editor Compatible

Mobile

Mobile applications

Various text editors available on iOS and Android (search for 'text editor' in app stores) Compatible
Dedicated TOML editor apps (if available) Compatible

Can .toml files be converted?

Options for saving or exporting this file to another format

In many cases, a .toml file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.

  • Use the original software that created the file when possible.
  • Check whether the application supports exporting to common formats.
  • Be careful with online converters when working with private, business, or sensitive files.
  • If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .toml file.

Why can't I open a .toml file?

Common reasons this file type may not open correctly

Wrong software

The file may require a specific program that supports the .toml format.

Incorrect extension

The file extension may have been renamed manually, even though the actual file format is different.

Corrupted file

The file may be incomplete, damaged during download, or transferred incorrectly.

Outdated app

Your software may need to be updated before it can open newer versions of this file format.

Frequently Asked Questions

Common questions about .toml files

To open a .toml file, use software that supports this file format.

  • Notepad++ (with TOML plugin)
  • Sublime Text (with TOML package)
  • Visual Studio Code (with TOML extension)
  • Atom (with TOML package)
  • Any text editor

Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.

  1. Verify that the file extension is correct.
  2. Install or update compatible software.
  3. Try another application that supports this format.
  4. Check whether the file is corrupted, incomplete, or encrypted.

A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.

File safety tips

Use caution with unknown files

Only open files from trusted sources. Before opening a .toml file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.