>> TO4 file

TO4 file format description

Many people share .to4 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .to4 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .to4 files.

1 filename extension(s) found in our database.

.to4 - Top 4 Compressed Data

The TO4 archive files are related to Top 4. TO4 file is a Top 4 Compressed Data. Top 4 is an old compressor software by Tobias Svensson. The Top 4 seems to be no longer supported.

Top 4
Archive files
- / -
Top 4 Compressed Data related extensions:
oZip Compressed Data
ljArchive Archive
Liberty Instruments LAUD Program Update
File Lock Pro Encrypted Archive
Zardoz Archive
Amiga Zoom Compressed Archive

Naturally, other applications may also use the .to4 file extension. Even harmful programs can create .to4 files. Be especially cautious with .to4 files coming from an unknown source!

Can't open a .to4 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 can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .to4 file extension is often given incorrectly!

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

tot, tp4, t4, tk4, toe

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

LG Phone Rom
RollerCoaster Tycoon Track Picture
TaxCut Federal Data
TerrAlign Alignment Configuration
Top 4 Compressed Data
Wintec WSG-1000 Mark Database

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .to4 file format, then write to us!

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