Practical support for anonymizing and pseudonymizing qualitative research data is offered by:

• The anonymization tool QualiAnon for semi-automated anonymization of text-based data:
  https://www.qualiservice.org/de/helpdesk/webinar/tools.html
• The accompanying guide by Mozygemba and Hollstein (2023):
  User Manual: QualiAnon – Tool for the anonymization of text data (v1.3)