CH1 file format description

Many people share .ch1 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .ch1 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .ch1 files.

1 filename extension(s) found in our database.

.ch1 - Lotus Freelance Graphics Chart

The CH1 graphic files are related to Lotus SmartSuite. The CH1 file is a Lotus Freelance Graphics Chart. Lotus Freelance Graphics is an information graphics and presentation program developed by Lotus Software. Lotus Freelance Graphics is a part of the Lotus SmartSuite.

Lotus SmartSuite
Graphic files
- / -
Lotus Freelance Graphics Chart related extensions:
VertiZontal Interlacing Image
Cartesian Document Image
PieceWise-Constant Image
Commodore 64 Interlace Hires Editor Bitmap
CoverFactory Native Bitmap Format Data
Fujitsu AutoGraFX Bitmap Object

Naturally, other applications may also use the .ch1 file extension. Even harmful programs can create .ch1 files. Be especially cautious with .ch1 files coming from an unknown source!

Can't open a .ch1 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 .ch1 file extension is often given incorrectly!

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

c1, cb1, ch, chl, chq, chw, cm1, ct1, cu1, fh1, h1, sh1

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Chromeleon Channel Raw Data
Scitex Continuous Tone
Microsoft SMS Proposed Site Control Data
ConTEXT Highlighter Data
CARE-S InfoWorks Biochemical Oxygen Detail Data
CIRCAD Schematic Document

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, 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 .ch1 file format, then write to us! >> CH1 file