A daily updated filename extension database!

A03 file extension

The table below provides useful information about the .a03 file extension. It answers questions such as:

  • What is the .a03 file?
  • What program do I need to open a .a03 file?
  • How can the .a03 file be opened, edited or printed?
  • How can I convert .a03 files to another format?

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

0 extension(s) and 2 alias(es) found in database

✅ ARJ Compressed Archive

ARJ Compressed Archive .arj file icon
ARJ file is an ARJ Compressed Archive. It is the native format of ARJ (dos) and WinARJ archiver. Like other archives, ARJ files are data containers, they store one or several files in the compressed form.
ARJ format description not yet available
Category: Archive files
Application: WinARJ
Mime-type: application/x-arj-compressed
Magic number: -
Magic string: -
Sample: -
ARJ aliases:
a00, a01, a02, a03, a04, a05, a06, a07, a08, a09, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24
ARJ related links:
ARJ related extensions:
LH ARC Compressed Archive

Compressed Microsoft Cabinet File

Gzip Compressed File

LHarc Compressed Archive

StuffIt Expander Archive

Tape Archive

Unix Gzipped TAR Archive

Compressed File

ZIP Archive

Zoo Compressed Archive

✅ WOW! Diagnostic Firmware Module

WOW! Diagnostic Firmware Module .h86 file icon
H86 file is a WOW! Diagnostic Firmware Module. WOW! Diagnostic is a software and hardware solutions for car service and repair.
H86 format description not yet available
Category: Data files
Application: WOW! Diagnostic
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
H86 aliases:
H86 related links:
H86 related extensions:
WOW! Diagnostic Registration Data

WOW! Diagnostic Firmware Data

WOW! Diagnostic Configuration Data

WOW! Diagnostic Log Data

WOW! Diagnostic Data

WOW! Diagnostic Exclude Data

WOW! Diagnostic P0 Data

WOW! Diagnostic USB Data

WOW! Diagnostic Properties Data

WOW! Diagnostic Firmware Module Info

Other types of files may also use the .a03 file extension.

🚫 The .a03 file extension is often given incorrectly!

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

ap3, w03, x03, z03

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

InfoZIP ZipSplit Splitted ZIP Archive
VS10XX VSOS Application
Asprova Project
Yamaha SY Series Sample
Paradox Secondary Index
WinZip First Split Zip

🔴 Can't open a .a03 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 .a03 file association, check the FAQ.

🔴 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 .a03 file extension, write to us!

Browser: Abbreviation Application Archive Audio Configuration Data Development Disk Image Document Ebook Font Game Data GIS Graphic Malware Multimedia Other Project Scam Unknown Video
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