The File Extensions Database

.003 File Extension

  • Category: Backup Files
  • Format: Binary

What is an .003 file?

.003 is Split Archive Part 3 File

Third part of a split archive created by file splitter and combiner programs; contains the data sequentially following the data stored in a .001 and .002 file; may also have corresponding files with the extensions ".004," ".005," etc. depending on the file size.

File splitting and combining utilities are useful for dividing large files into smaller pieces that make tasks such as emailing large files more manageable.

NOTE: While the ".001," ".002," ".003". extensions are commonly used, not all of them use the same file format. Therefore, be sure to check the software that originally created the file.

Programs that open Split Archive Part 3 File
Smith Micro StuffIt Deluxe for Windows
Welltek 001 File Joiner & Splitter
Freebyte HJSplit for Java
Freebyte HJSplit
OO1 File Manager
File Splitter & Joiner
Incredible Bee Archiver
Smith Micro StuffIt Deluxe 16
Freebyte HJSplit for Java
Split & Concat
Freebyte HJSplit for Java
Freebyte HJSplit for Linux

How to solve problems with 003 files

  • Associate the 003 file extension with the correct application. On :
    Windows: Right click on any 003 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.003 files". Mac: Right click (or Ctrl-click) the 003 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .003 is Split Archive Part 3 File. Because only the current version supports the latest 003 file format. Search, therefore, e.g. on the N/A manufacturer website after an available .003 is Split Archive Part 3 File update.
  • To make sure that your 003 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.