atom

.atomAtom Text File

GitHub · 2014

Developer
GitHub
Category
Programming
MIME Type
text/plain
First Released
2014
Open Format
Yes
File Signature
N/A (plain text)
At a Glance
.atom
Atom Text File

An .atom file is a plain text file primarily associated with the Atom text editor, used for storing code or general text content.

Reviewed on July 13, 2026
Compression
Plain text
Transparency
N/A
Editability
High
Best for
Plain text and code editing

Key Features

  • Plain text content, universally compatible.
  • Can store any type of textual data, including source code.
  • Primarily associated with the Atom text editor.
  • No inherent formatting or structural limitations beyond standard text.

Best For

  • Writing and editing code where syntax highlighting is beneficial.
  • Storing simple, unformatted text content.
  • Users who prefer the Atom text editor's features.
  • Configuration files that require plain text format.

Less Ideal For

  • Rich text documents with complex formatting (use .docx, .odt).
  • Image or media files (use .jpg, .png, .mp4).
  • Spreadsheets with formulas and data analysis (use .xlsx, .ods).
  • Presentations with slides and multimedia (use .pptx, .odp).

Common Use Cases

  • Storing source code for various programming languages.
  • Writing and saving configuration files.
  • Creating and editing simple text notes or documents.
  • Saving plain text data for export or import between applications.

How to Open It

  1. Double-click the file if Atom or another text editor is set as the default handler.
  2. Right-click the file, select 'Open With...', and choose Atom or another compatible text editor (like VS Code, Sublime Text, Notepad++).
  3. Open Atom or your preferred text editor, then use the 'File' > 'Open File' menu to navigate to and select the .atom file.

What is a .atom file?

The .atom file extension typically refers to a plain text file used by the Atom text editor. While it's not a distinct file format itself, it signifies a file created or intended to be edited within Atom. These files can contain any type of text, from programming code to simple notes. Atom is a highly customizable, free, and open-source code editor developed by GitHub, known for its user-friendly interface and extensive package ecosystem.

Programs That Open .atom Files

PlatformProgram
WindowsAtomFreeOfficial
Notepad++Free
Visual Studio CodeFree
macOSAtomFreeOfficial
TextEditFreeOfficial
Visual Studio CodeFree
LinuxAtomFreeOfficial
geditFree
Visual Studio CodeFree
AndroidQuickEdit Text EditorFree
Acode - powerful code editorFree
iOSTextastic Code EditorPaid
a-ShellFree

How to Convert .atom Files

FormatMethod
.TXTRename file extension, Save As within Atom
.MDSave As within Atom, Rename file extension if content is Markdown

Common Problems with .atom Files

⚠️ File won't open correctly.
Ensure you are using a compatible text editor. The file might be corrupted or saved with an incorrect encoding.
⚠️ Syntax highlighting isn't working.
Atom automatically detects many languages. If not, you may need to manually set the language mode or install a specific package within Atom.

Frequently Asked Questions

Is .atom a unique file format?

No, .atom files are typically standard plain text files. The extension mainly indicates it was created or is intended to be used with the Atom text editor.

Can I open .atom files with any text editor?

Yes, because they are plain text, .atom files can be opened with virtually any text editor, including Notepad, TextEdit, VS Code, Sublime Text, and more.

What is Atom?

Atom was a free, open-source text and source code editor developed by GitHub, known for its customization and package ecosystem. While development has ceased, many users still work with files created in it.

Technical Details

Files with the .atom extension are essentially standard plain text files with a UTF-8 encoding. They do not contain any special formatting or embedded data structures beyond what is typical for text files. The extension simply serves as an indicator to the operating system and applications that the file is intended to be processed as text, often within the context of code editing.

Did You Know?

Atom was often described as a 'hackable text editor for the 21st Century'.
GitHub officially sunsetted development of the Atom editor on December 15, 2022.

Security Information

As .atom files are plain text, they generally pose low security risks unless they contain malicious code disguised as text or configuration. Always be cautious when opening files from untrusted sources, especially if they are scripts or configuration files that could execute commands.

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