Many people write Tcl code using just their favorite editor and the Tcl interpreter to test and debug. The [Tcl editors] and [IDE] pages list editors and IDE's and how they support in developing Tcl code.

Tools have been developed to assist in testing and debugging Tcl code. The [tcltest] package is part of Tcl and can be used to build test suites. The [Category debugging%|%debugging] page list many tools to assist in debugging.