DWGLock is a powerful and fast DWG tool, protecting drawing files from being modified or copied. It is a stand-alone application requiring no AutoCAD. Fetures include powerful encryption, protect the entities in drawing from copying and modifying. Recipients can view protected drawing file and add lines and markups to it. Batch encryption drawings in full folder and support lock drawings with passwords. The latest version supports AutoCAD drawing from R14 to 2019.