IesEdit is an editor for Tree of Savior's IES files, a binary format generated from XML data. IesEdit converts the IES files back to XML on-the-fly to allows users to edit them easily and is then able to save them as XML or once again as IES.
The editor is currently considered to be in alpha, with no features but basic data editing, though more features are planned for the future, such as editing in a table and advanced search and filtering functions.