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Details of the .sdef file extension

The table below provides useful information about the .sdef file extension. It answers questions such as:

  • What is the .sdef file?
  • What program do I need to open a .sdef file?
  • How can the .sdef file be opened, edited or printed?
  • Where can I find the specifications for .sdef?
  • Which MIME-type is associated with the .sdef extension?
  • How can I convert .sdef files to another format?
  • What are other, similar filename extensions to .sdef?

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

.sdef file extension details

AppleScript Dictionary Document

AppleScript Dictionary Document .sdef file icon
SDEF file is an AppleScript Dictionary Document. AppleScript is Apple's powerful and versatile native scripting technology for Mac OS X.
Category: Development files
Application: Mac OS X
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
SDEF aliases:
SDEF related links:
SDEF related extensions:
MS-DOS Batch File

Command File

Unix Shell Script

Mac OS X Installer Package

AppleScript Script

KSH Shell Script

AppleScript Script Bundle

AppleScript Scripting Addition

AppleScript Droplet

Other types of files may also use the .sdef file extension.

.sdef file extension error

The .sdef file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

sdf, def, sde, sef, sdev

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Iconics GraphWorx32 Symbol Library
Microsoft SQL Server Database
C++ Definition File
Binary Editor Definition Data
ArcSDE Connection File
Encryptafile Signature
open .sdef file

Can't open a .sdef file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .sdef file association, check the FAQ.

.sdef file extension

Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .sdef file extension, write to us!

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