JustLabel is a powerful printing engine with queue support and an integrated web-based WYSIWYG template editor. Its main attribute is the ability to print labels with different data using a REST API, simply by sending the data and template name. Templates are stored within the system, and the provided data is merged with the template on the fly by the engine, creating a fully-featured label. The system works with all printers that support ZPL and is available in both desktop and server versions. If used as server it can handle hundreds of printers even on huge company. One unique feature is the ability to generate an MS Excel sheet with predefined columns assigned to dynamic data fields from the template. By filling in records, you can easily print a label for data coming from each record. Additionally, the system allows programming of RFID labels if the printer supports that feature.