A daily updated filename extension database!

SD4 file extension

The table below provides useful information about the .sd4 file extension. It answers questions such as:

  • What is the .sd4 file?
  • What program do I need to open a .sd4 file?
  • How can the .sd4 file be opened, edited or printed?
  • How can I convert .sd4 files to another format?
  • Where can I find the specifications for .sd4?
  • Which MIME-type is associated with the .sd4 extension?

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

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

.sd4 file extension details

Smart Diary Suite 4 Database

Smart Diary Suite 4 Database .sd4 file icon
SD4 file is a Smart Diary Suite 4 Database. Smart Diary Suite 4 is a completely customizable personal information manager for Microsoft Windows.
SD4 format description not yet available
Category: Data files
Application: Smart Diary Suite 4
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
SD4 aliases:
SD4 related links:
SD4 related extensions:

Other types of files may also use the .sd4 file extension.

.sd4 file extension error

The .sd4 file extension is often given incorrectly!

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

sde, cd4, sw4, ss4, sdt, sc4, qd4, d4, sv4, sr4, sdr, sd, s4d, ds4

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

ArcSDE Connection File
Dymo DiscPainter Document
IBM Rational SDL Suite Data
TIFF Screened Data
Dataphor Source Code
SIR Procedure Definitions Data
STK Satellite Database Main File
Micrografx Designer 4 Graphic
Micrografx Designer Document
RIAM AVA Motion S4D Data
open .sd4 file

Can't open a .sd4 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 .sd4 file association, check the FAQ.

.sd4 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 .sd4 file extension, write to us!

.sd4 file extension

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