UNK file format description

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

2 filename extension(s) found in our database.

.unk - Lotus Notes Unknown Attachment File

The UNK data files are related to Lotus Notes. The UNK file is a Lotus Notes Unknown Attachment File. Lotus Notes is the "classic" client for accessing the Domino/Notes server and processing e-mail, appointments, contacts and much more. The att1.unk file is received by Lotus Notes if the original message was transmitted with MIME encoding.

Application:

Lotus Notes

Category:

Data files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

Lotus Notes Unknown Attachment File related extensions:

.nbo: nMod n-Body Model
.jammix: Jammix Enhancer Music Transformation Data
.xsu: UNICOM Sample User XML Data
.subs: AvantGo Subscription Data
.cyh: CyberHttp Injector Data
.ssfn: Steam Guard Data

.unk - Shimadzu UVProbe Data

The UNK data files are related to UVProbe. The UNK file is a Shimadzu UVProbe Data. UVProbe is multifunctional, easy-to-use software supplied as standard with Shimadzu UV-VIS Spectrophotometers.

Application:

UVProbe

Category:

Data files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

Shimadzu UVProbe Data related extensions:

.skindex: Apple Mail Index Data
.sta: MAME Saved State Data
.nscr: Nitro Screen Resource
.wvt: IDGS101 Waveform Data
.tpl: NoteTab Template File
.lfview: Leapfrog Viewer Scene

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

Can't open a .unk 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:

example.unk

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.

Open Control Panel > Control Panel Home > Default Programs > Set Associations.
Select a file type in the list and click Change Program.

The .unk file extension is often given incorrectly!

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

hnk, ink, jnk, knk, nk, ubk, uk, unl

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.hnk: Internet Explorer HTML Help Index
.knk: KNK Studio Cutting Docment
.uk: English Language Info File
.unl: Garmin Unlock Key
.jnk: General Temporary File
.ink: Tablet PC Digital Ink

Operating systems

DataTypes.net 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.

https://datatypes.net/open-unk-files

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