A daily updated filename extension database!

ET3 file extension

The table below provides useful information about the .et3 file extension. It answers questions such as:

  • What is the .et3 file?
  • What program do I need to open a .et3 file?
  • How can the .et3 file be opened, edited or printed?
  • How can I convert .et3 files to another format?
  • Where can I find the specifications for .et3?
  • Which MIME-type is associated with the .et3 extension?

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

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

e-Szigno Recorded Delivery Data

ET3 file is an e-Szigno Recorded Delivery Data. The e-Szigno is an electronic signature creation application. e-Szigno is widely used by Hungarian barristers, notaries and by various governmental and private organizations in Hungary.
ET3 format description not yet available
Category: Other files
Application: e-Szigno
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
ET3 aliases:
ET3 related links:
ET3 related extensions:
e-Szigno Signed Document

Other types of files may also use the .et3 file extension.

The .et3 file extension is often given incorrectly!

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

e3, te3, st3, etr, et, t3, etw, ete

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Think3 Thinkdesign CAD Document
Star 3 MIDI Karaoke File
Esoteria Game Data
TADS 3 Compiled Game
Easiteach Lesson
WinTrack Object File
EpsilonTest Editor Template
eFax Document
eTextReader Document
Macromedia Freehand Template

Can't open a .et3 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 .et3 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 .et3 file extension, write to us!

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