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Every instrument here is public domain or free to use, administered in full, and scored with its official rules — no AI in your numbers. Taking tests is free; completing more than one unlocks a richer integrated report.
The Comprehensive Profile
Every test below is free, and stays free. The one paid thing on this platform is the Comprehensive Profile: an integrated, AI-written narrative across all the tests you've completed, with change over time when you retake one. Generate it from any results page.
Big Five (IPIP-50)
FreeMeasures the five broad domains of personality: Extraversion, Agreeableness, Conscientiousness, Neuroticism, and Openness to Experience.
50 items · ~10 min
IPIP-NEO-120
Profile coreFreeJohnson's 120-item public-domain inventory measuring the Five Factor Model in depth: five broad domains plus thirty narrow facets (e.g. Anxiety, Assertiveness, Altruism, Self-Discipline). The most detailed personality profile on this platform.
120 items · ~20 min
PHQ-9
FreeA widely used 9-item screening measure for symptoms of depression over the past two weeks. A screener, not a diagnosis.
9 items · ~3 min
GAD-7
FreeA widely used 7-item screening measure for symptoms of anxiety over the past two weeks. A screener, not a diagnosis.
7 items · ~2 min
PCL-5
FreeA 20-item screening measure of post-traumatic stress symptoms over the past month, developed by the U.S. National Center for PTSD. Please note: the questions ask about reactions to a very stressful experience, which some people find difficult — you can stop at any time. A screener, not a diagnosis.
20 items · ~5 min
SAPAS
FreeAn 8-question screen for personality difficulties. A positive screen does not mean you have a personality disorder — it only means a fuller assessment with a professional could be informative. Around 1 in 7 people screen positive.
8 items · ~1 min
SD3
FreeA 27-item research measure of three 'dark' but normal-range personality traits: Machiavellianism, narcissism, and trait psychopathy. Everyone scores somewhere on these dimensions — elevations describe interpersonal-style tendencies, never a diagnosis.
27 items · ~4 min
Levenson Self-Report Psychopathy Scale (LSRP)
Not offered: the item text sits in an APA-copyrighted journal article with no reproduction rights we could verify — the same standard that keeps the MCMI off this site. The SD3's trait-psychopathy subscale covers adjacent ground.