WebAnno is a general purpose Web-based annotation tool for a wide range of linguistic annotations. It offers annotation project management, freely configurable tagsets, and the management of users in different roles. It uses technology from the brat rapid annotation tool for visualizing and editing annotations in a Web browser. It supports annotation and visualization of arbitrarily large documents, pluggable import/export filters, the curation of annotations across various users, and farming out annotations to a crowdsourcing platform.
