a2t

.a2tAutoCAD Text File

Autodesk · 1982

Developer
Autodesk
Category
Documents
MIME Type
text/plain
First Released
1982
Open Format
Yes
File Signature
Not applicable (plain text file)
At a Glance
.a2t
AutoCAD Text File

An .a2t file is a plain text file format used by AutoCAD to store and manage textual data within CAD drawings.

Reviewed on May 24, 2026
Compression
Plain text
Transparency
No
Editability
High
Best for
CAD text data

Key Features

  • Plain text format, easily readable and editable with standard text editors.
  • Stores textual annotations and elements specific to AutoCAD drawings.
  • Facilitates the export and import of text data from CAD projects.
  • Can contain various types of text-based CAD information.

Best For

  • Storing and transferring text elements for AutoCAD.
  • Simple export/import of textual annotations.
  • Reviewing CAD text content outside of AutoCAD.
  • Automating text creation in AutoCAD drawings.

Less Ideal For

  • Storing complex graphical data.
  • Sharing entire drawings with full graphical fidelity.
  • As a primary format for non-textual CAD elements.
  • General document creation outside of CAD contexts.

Common Use Cases

  • Exporting text labels and dimensions from an AutoCAD drawing.
  • Importing pre-formatted text into an AutoCAD drawing.
  • Archiving textual annotations from CAD projects separately.
  • Programmatic generation or modification of text within CAD files.

How to Open It

  1. Open AutoCAD and use the 'Import' or 'Insert' commands, selecting the .a2t file.
  2. Open the .a2t file in any standard text editor (like Notepad, VS Code, Sublime Text) to view its raw content.
  3. Use specific commands within AutoCAD to place or manage the text data from the .a2t file.

What is a .a2t file?

An .a2t file is a plain text file primarily used by AutoCAD to store specific text elements and annotations within a drawing. These files can contain information such as line text, multiline text, dimensions, and other textual data that are part of a CAD project. While it's a text-based format, it's structured in a way that AutoCAD can easily parse and integrate its content into drawings. This makes it useful for exporting or importing text data, allowing for easier manipulation or archiving of textual information associated with CAD designs.

Programs That Open .a2t Files

PlatformProgram
WindowsAutoCADPaidOfficial
Notepad++Free
macOSTextEditFreeOfficial
BBEditPaid
LinuxgeditFree
VimFree
Web BrowserGoogle DocsFree

How to Convert .a2t Files

FormatMethod
.DWGAutoCAD Import/Export
.TXTSave As in Text Editor, AutoCAD Export

Common Problems with .a2t Files

⚠️ Text not appearing correctly in AutoCAD.
Ensure the .a2t file's content adheres to AutoCAD's expected text syntax and encoding. Check for any special characters or formatting issues.
⚠️ Unable to open the .a2t file.
Verify that the file is indeed a plain text file. If it's corrupted or not a standard .a2t, it might require specific recovery tools or might be an entirely different file type.

Frequently Asked Questions

Can I edit an .a2t file directly in AutoCAD?

Yes, you can import the .a2t file into AutoCAD and edit the text objects as you would with any other text within the drawing.

Is .a2t a graphical file format?

No, .a2t is strictly a text-based format and does not contain graphical data; it only stores textual annotations.

Can I use .a2t files for other CAD software?

While it's a plain text file, other CAD software may not recognize its specific structure. It's primarily intended for use with Autodesk products.

Technical Details

The .a2t format is essentially a plain text (ASCII) file, meaning its contents can be read and edited with any standard text editor. However, it adheres to a specific structure or syntax that AutoCAD recognizes for its text objects. This allows AutoCAD to interpret the data and place it correctly within a drawing environment, such as handling formatting and positioning.

Did You Know?

The .a2t extension is a less common format compared to AutoCAD's primary drawing files like .DWG and .DXF.
Because it's plain text, you can also find .a2t files used for simple script-like commands or configurations within some software, though this is not its primary AutoCAD purpose.

Security Information

As .a2t files are plain text, they generally pose no direct security risks like executable files. However, always ensure the source of any downloaded .a2t file is trusted, as it could potentially contain links or references to malicious content if misused.

Related Extensions