Born and raised in Slovenia, she studied guitar playing with Sonja Prunnbauer in Freiburg and with Oscar Ghiglia in Basel. Over the last 20 years, she completely dedicated herself to interpretations of new music on an emotional as well as intellectual level with an immense stage presence. Several new works originated, including important premieres by Vinko Globokar, Nicolas A. Huber, Beat Furrer, Georg Friedrich Haas, Helmut Oehring, Martin Smolka, Arturo Fuentes und Uroš Rojko.

She appears as a soloist and chamber musician with noted ensembles including Ensemble Experimental des SWR, Ensemble Mosaic, Academy of the Ensemble Modern, Aleph Guitar Quartet, Slowind, SWR Radio Symphony Orchestra Stuttgart, Slovenian Philharmonic, and Slovenian Radio. In addition, she has worked with the soloists such as Sylvia Nopper, Luka Juhart, Uroš Rojko, Teodoro Anzellotti, Ernesto Molinari, Isao Nakamura, Petra Hoffmann, and Renate Greiss-Armin. She also appears at numerous festivals of contemporary music in Europe and Asia, including Musik Eclat (Stuttgart), Maerzmusik (Berlin), Musik Protokoll (Graz), Musica Viva (Munich), Internationale Weingartener Tage für Neue Musik, Hamburger Klangwerktage, Warsaw Autumn, Archipel (Geneva), Rote Fabrik (Zurich), Pan Festival (Seoul), Villa Massimo (Rome), Slowind Festival (Ljubljana), Teatre Metropol (Tarragona), ISCM World Music Days.

Klara Tomljanovič lives in Karlsruhe.