AuDHDTest.org — Free AuDHD & ADHD Self-Screening Tool

AuDHDTest.org is a free, private online screening platform for adults exploring whether they may have co-occurring autism and ADHD, built around the clinically validated AQ-10 autism screening and ASRS-5 ADHD screening instruments developed at Cambridge and the WHO respectively. The combined AuDHD screener runs to sixteen questions and takes around three minutes, returning an instant breakdown of autism and ADHD trait scores without requiring an account, an email address or any personal data. The site also offers standalone autism and ADHD screeners, the in-depth eighty-question RAADS-R autism assessment, the CAT-Q masking questionnaire and a full combined instrument running to 111 questions — all free, all private, and available in twelve languages.

The platform exists to address a well-documented diagnostic gap: research consistently shows that 50–70% of autistic people also meet criteria for ADHD, yet the two conditions are frequently missed together because their traits can mask each other, and most assessment pathways still treat them separately. AuDHDTest.org makes a structured first step accessible to anyone with a browser and three minutes — particularly relevant for adults who are not yet sure whether to pursue a formal assessment, who want to understand their experience before approaching a clinician, or who face cost or waitlist barriers to formal diagnosis.

Results include a plain-language explanation of what the scores suggest, what the validated instruments can and cannot tell you, and signposting to professional support where relevant. The site is clear that it is an educational and screening resource, not a medical diagnostic instrument, and does not assess children. Screening is free permanently with no subscription or paywall.