An open trial will be conducted at the Child and Mental Health Service (CAMHS) unit in the rural county Jämtland in Sweden to test the feasibility and efficacy of Internet-delivered Cognitive Behavior Therapy (ICBT) for children with anxiety disorders in a clinical setting. 20 children with a principal diagnosis of Generalized Anxiety Disorder (GAD), separation anxiety, specific phobia and their parents will be recruited from the CAMHS-center in Östersund. They will receive 12 weeks of therapist-supported ICBT and will be assessed by clinician ratings and child- and parent-reports at baseline, post-treatment and 3 month follow-up. The primary outcome measures the Clinical Global Impressions - Severity scale (CGI-S). Secondary outcome measures include clinician rated global functioning, and child and parent-rated anxiety and functioning.

Inclusion Criteria:

• 8-12 years of age
• Fulfilling diagnostic criteria for Generalized Anxiety Disorder (GAD), Separation anxiety, Specific phobia
• Ability to read and write Swedish
• Daily access to the internet
• A parent that is able to co-participate in the treatment
• Participants on psychotropic medication must have been on a stable dose for the last 3 months prior to baseline assessment

Exclusion Criteria:

• Diagnosed autism spectrum disorder or Attention-deficit/hyperactivity disorder (ADHD), or principal primary disorder other than GAD, Separation anxiety, Specific phobia
• Acute/severe psychiatric problems such as suicidal risk or severe depression
• Ongoing psychological treatment for anxiety disorders
• Ongoing child custody dispute or abuse in the family