A daily updated filename extension database!

ALTH file extension

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

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

Table of Contents

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

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

✅ QuickHelp for Mac Data

ALTH file is a QuickHelp for Mac Data. QuickHelp is a development tool for creating and deploying application help files to Mac OS X and Windows.
ALTH format description not yet available
Category: Data files
Application: QuickHelp for Mac
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
ALTH aliases:
ALTH related links:
ALTH related extensions:
QuickHelp for Windows Data

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

🚫 The .alth file extension is often given incorrectly!

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

alt, ath, lth

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Microsoft Dynamics AX Application Label Temporary File
Athena Task File
Alphacam Lathe Thread
Roxio Label Creator Style Data

🔴 Can't open a .alth 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 .alth 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 .alth file extension, write to us!

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