The Schweizerisches Idiotikon documents the Alemannic vernacular in Switzerland from the 13th through to the 21st century. Sixteen volumes published so far with more than 135,000 entries amount to the most comprehensive historical dictionary of a German language region. The whole printed work will comprise 17 volumes. Sixteen volumes of the Schweizerisches Idiotikon have been published so far; volume 17 is in progress. In recent years, various projects for improved accessibility to the invaluable contents of the dictionary have been carried out step by step: the digitisation of the printed parts, the extension of existing and the implementation of new indexes. Since 2010, the Schweizerisches Idiotikon has been available online. Different methods of access have been implemented since to simplify its use.