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TDT1 file extension

The table below provides useful information about the .tdt1 file extension. It answers questions such as:

  • What is the .tdt1 file?
  • What program do I need to open a .tdt1 file?
  • How can the .tdt1 file be opened, edited or printed?
  • How can I convert .tdt1 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

✅ AACS Thumbnail Data File

TDT1 file is an AACS Thumbnail Data File. Advanced Access Content System (AACS) is a specification for managing content stored on the next generation of prerecorded and recorded optical media for consumer use with PCs and CE devices. menu.tdt1 and menu.tdt2 contain the thumbnail picture data pointed to by the menu.tidx file. menu.tdt1 is encrypted by the Unit Key for the CPS_Unit associated to the menu thumbnail in a BDAV directory. menu.tdt2 is not encrypted.
Category: Data files
Application: VLC Media Player
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
TDT1 aliases:
TDT1 related links:
TDT1 related extensions:
AACS Thumbnail Index File

Other types of files may also use the .tdt1 file extension.

🚫 The .tdt1 file extension is often given incorrectly!

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

dt1, td1, tdt

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

DTED Level 1 Data
THOR Datatree File
AVCHD Thumbnail Data
PLINK Transmission Disequilibrium Test Report
Teledisk Floppy Image

🔴 Can't open a .tdt1 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 .tdt1 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 .tdt1 file extension, write to us!

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