The Basic CNC Viewer is free. No license is required and it will never expire.

U.S. Law Restrictions.
You may not download this software and may not accept the terms of the EULA if you are a person barred from trade under the laws of the United States

This software must not be relied upon to validate an NC machine program for use in a commercial application. Please see the EULA for limit of liability and restrictions.

See releases page for future releases.

01/01/2007 Initial release
is a BETA release and should not be used in ANY production environment.

V1.0.0.2
Improved error handling in parser.
Added viewports and display settings to stored settings. Allowed parser to be more tolerant.
Fixed a problem with the settings dialog. Fixed a problem where sometimes an M-code was treated as a motion code. Added support for sub program repeats and drill repeats. Added auto-refresh.
Refesh will be triggered when the gcode modified time changes. 07/15/2007
Fixed a problem with the progress bar.

7/29/2007
Fixed a problem viewing small elements <.001 long.
Removed Click Once deployment because too many people are having trouble with it.

7/29/2007
Version skipped.

11/11/2007
Added support for passing file argument on startup.
Improved tolerance of processor. 

V1.0.0.11
Fixed a problem with rapid positioning.

V1.0.0.12
Fixed some problems with the code parser.

V1.0.0.13
Version skipped.

V1.0.0.14
Fixed a problem with EULA window and added information display.

V1.0.0.15
Fixed a problem where the last line in some files was not processed.

V1.0.0.16
Added a Play toolbar.

V1.0.0.17
Fixed a performance problem.

V1.0.0.18
Fixed a problem with Vista and Windows 7 where the program will not start.

V1.0.0.19
4/11/2010
Fixed a problem where graphics are invisible when no tool is specified.

V1.0.0.20
9/15/2010
Added integer option to machine precision.
Improved comment character options to allow single character comment lines.

V1.0.0.21
10/05/2010
Added notification when the graphics performance is slow
so that the user may adjust the settings.

V1.0.0.22
04/19/2015
Added setting to ignore whitespace while parsing.

V1.0.0.23
04/24/2015
Added ClickOnce deploy and attempted to fix a localization problem.

V1.0.0.24
05/02/2015

V1.0.0.25
06/20/2015
Added machine limits display.

V1.0.0.26
06/26/2015
Zoom at mouse position.

V1.0.0.27
10/04/2015
Added touch support.
DotNet 4.

V1.0.0.28
10/19/2015
Added editor panel.

V1.0.0.29
10/30/2015
Bug fixes.

V1.0.0.30
11/02/2015
Fixed a tool color problem when creating a new file.

V1.0.0.33
3/20/2016
Many fixes and added support for Macro-B

V1.0.0.34
4/05/2016
Bug fixes and added propertygrid for Macro-B settings

V1.0.0.36
5/16/2016
Improved error handling for macro files. Fixed display units in the viewer.

V1.0.0.37
Fixed display units in the viewer again
Added feedrate display in the viewer Atl+F
Added end point display in the viewer Alt+P
Improved error handling for macro files. Fixed display units in the viewer.

V1.0.0.38
Fixed rotary motion problem

V1.0.0.39
Minor fixes

V1.0.0.40
Improved work offset support

V1.0.0.41
Fixed a problem when editor was not displayed.
 
V1.0.0.43
Recompiled to include all current fixes.
 
V1.0.0.44
Added setting to invert axees.
 
V1.0.0.45 11/10/2019
Added G51 support.
Fixed View Shift setting were not being saved.
Fixed a G28 problem.
Improved viewer rotation.
Improved viewer mouse location readout.
Added measurement to the viewer.
Added view history to the viewer Ctrl+Z Ctrl+Y.

V1.0.0.46 2/14/2020
V1.0.0.47 2/16/2020

Recompiled to include all current fixes.
Added cutter comp markers, A+O  
V1.0.0.50
Minor fixes
Editor is now Avalon Edit
 
V1.0.0.63
Signed installer and exe

V1.0.0.64
Fixed a problem with G68 not working properly
Upgraded to DOTNET 4.8
Fixed a problem where graphics lingered from last file