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CQT file extension

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

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

✅ Mail.dat Container Quantity Data

Mail.dat Container Quantity Data .cqt file icon
CQT file is a Mail.dat Container Quantity Data. Mail.dat is the standard embraced by a significant portion of the mail production industry and the US Postal Service. Mail.dat is a relational database of nineteen "connected" files describing each characteristic that can exist within a mailing.
Category: Data files
Application: PostalOne!
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
CQT aliases:
CQT related links:
CQT related extensions:
Mail.dat Mail Piece Unit File

Mail.dat Postage Account File

Mail.dat Component File

Mail.dat Container Summary File

Mail.dat International Container Label File

Mail.dat Package Quantity File

Mail.dat Walk Sequence File

Mail.dat Package Label File

Mail.dat Piece Detail File

Mail.dat Special Fees File

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

🚫 The .cqt file extension is often given incorrectly!

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

cq, cqf, ct, qct, qt, sqt, xqt

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Scitex Continuous Tone
ETCBC Chapter Data
CQUAL Configuration
QuickTime Movie
Quick Chart Data
PCAnywhere Command Queue Data
QuarkXPress Article Template
Silicon Graphics Iris Cliptexture
Compiled SQR Script
TIFF Contone File

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

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