ANN file format description

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

2 filename extension(s) found in our database.

.ann - Windows Help Annotations

The ANN data files are related to WinHelp. ANN file is a Microsoft Windows Help Annotations. Windows Help is a component of Windows that is accessible from various Windows programs. The WinHelp seems to be no longer supported.

Application:

WinHelp

Category:

Data files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

Windows Help Annotations related extensions:

.chq: Help Combined Full-text Search
.hlp: Windows Help File

.ann - ENVI Annotation Data

The ANN data files are related to ENVI. ANN file is an ENVI Annotation Data. ENVI image analysis software is used by GIS professionals, remote sensing scientists, and image analysts to extract meaningful information from imagery to make better decisions.

Application:

ENVI

Category:

Data files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

ENVI Annotation Data related extensions:

.adj: ADS40 Orientation Adjustment Data
.ads: ADS40 Header Data
.cam: ADS40 Camera Calibration Data
.dim: TripleSat DIMAP Data
.evf: ENVI Vector Data
.ker: ENVI Filter Kernel

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

Can't open a .ann 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.ann

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 .ann file extension is often given incorrectly!

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

abn, agn, ahn, amn, an, anb, ang, anh, anm, nan, nn, znn

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.anb: i2 Analyst's Notebook Data
.ahn: Our Family Tree Data
.amn: Markush AMN File
.nan: NanoScope Software Data
.abn: Alpha Five Database Export
.nn: Nero CD File List

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-ann-files

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

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