aft

.aftAFT File

Autodesk · 1987

Developer
Autodesk
Category
Documents
MIME Type
application/vnd.autocad-ascii-text
First Released
1987
Open Format
No
File Signature
N/A (plain text files do not typically have a unique header signature)
At a Glance
.aft
AFT File

An AFT file is a plain ASCII text file primarily used for storing textual data related to AutoCAD drawings or similar CAD applications.

Reviewed on June 9, 2026
Compression
Plain text
Transparency
No
Editability
High
Best for
Simple text data

Key Features

  • Plain ASCII text format for human readability.
  • Simple structure, easily editable with text editors.
  • Supports textual data related to CAD drawings.
  • High compatibility across various software due to plain text nature.

Best For

  • Storing and sharing simple, human-readable text data.
  • Accompanied notes or labels for CAD projects.
  • Text-based data that needs broad software compatibility.

Less Ideal For

  • Storing complex graphical data or drawings.
  • Maintaining formatting or rich text elements.
  • Large datasets requiring efficient compression.
  • Applications that strictly require binary input/output.

Common Use Cases

  • Storing textual annotations for CAD drawings.
  • Exporting simple text-based data from CAD software.
  • Creating simple configuration or note files for related applications.
  • Sharing basic textual information that doesn't require complex formatting.

How to Open It

  1. Open with any standard text editor like Notepad (Windows), TextEdit (macOS), or Gedit (Linux).
  2. Some CAD software, including AutoCAD, can open these files directly.
  3. If double-clicking doesn't work, right-click the file, choose 'Open With', and select a text editor.

What is a .aft file?

An AFT file is essentially a plain text file that contains ASCII characters, often used to store drawing information or text data related to AutoCAD drawings. These files are not complex binary formats; instead, they are designed to be human-readable and easily editable with standard text editors. While not a primary drawing format itself, AFT files can serve as a supplementary data store, potentially holding notes, labels, or specific textual components associated with CAD projects. Their simplicity makes them compatible with a wide range of software.

Programs That Open .aft Files

PlatformProgram
WindowsNotepadFreeOfficial
WordPadFreeOfficial
AutoCADPaidOfficial
macOSTextEditFreeOfficial
PagesPaid
AutoCAD for MacPaidOfficial
LinuxGeditFreeOfficial
VimFree
EmacsFree
AndroidQuickEdit Text EditorFree
Google DocsFree
iOSNotesFreeOfficial
PagesPaid
Web BrowserGoogle Drive (Docs)Free
Online Text Editors (e.g., codeanywhere.com)Free

How to Convert .aft Files

FormatMethod
.TXTSave As in text editor, Copy/Paste into new .txt file
.DXFExport from AutoCAD if structure allows

Common Problems with .aft Files

⚠️ File contains non-ASCII characters or encoding issues.
Ensure the file is saved strictly as ASCII. If opened in a word processor, re-save it as plain text with ASCII encoding.
⚠️ Cannot open the file in CAD software.
Verify that the AFT file contains data in a format the CAD software expects. It might be purely text and not compatible with drawing data interpretation.

Frequently Asked Questions

Is an AFT file a drawing file?

No, an AFT file is a plain text file that can contain information related to drawings, but it is not a drawing format itself. It's for textual data.

Can I edit an AFT file with any text editor?

Yes, because it's a plain ASCII text file, you can use any standard text editor like Notepad, TextEdit, or Gedit to view and edit its contents.

What is the main difference between AFT and TXT files?

Functionally, they are very similar as both are plain text. AFT files are often specifically associated with CAD applications (like AutoCAD) for storing related textual data, while TXT is a general-purpose text file.

Technical Details

AFT files are structured as plain ASCII text, meaning they consist solely of characters that can be represented in the 7-bit ASCII encoding. They do not employ any specific compression algorithms or complex binary structures. AutoCAD itself, and other compatible CAD software, can interpret the content within these files, which typically relates to drawing elements or textual annotations.

Did You Know?

The 'AFT' designation in AutoCAD context often refers to ASCII text.
Its human-readable nature makes it useful for simple configuration or log data within specific software ecosystems.

Security Information

AFT files, being plain text, are generally safe. However, as with any file type, avoid opening files from unknown or untrusted sources, as malicious text could potentially be used in conjunction with vulnerable software, though this is rare for simple text files.

Related Extensions