A daily updated filename extension database!

THUMB file extension

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

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

✅ jAlbum Thumbnail

THUMB file is a jAlbum Thumbnail. jAlbum is a PC desktop application to create and manage image galleries to be displayed in Web pages.
THUMB format description not yet available
Category: Graphic files
Application: JAlbum
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
THUMB aliases:
THUMB related links:
THUMB related extensions:

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

🚫 The .thumb file extension is often given incorrectly!

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


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

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