Discover Your Mind
A personality assessment grounded in Jungian psychology and developed using established psychometric methods. 32 questions. No personal data collection. Completely free.
Four Dimensions of Personality
Your personality type emerges from these fundamental psychological preferences. Most people aren't purely one or the other—think of each dimension as a spectrum where you may lean more toward one side.
Energy Direction
Extraversion vs Introversion. Where do you direct your energy—outward to people and activities, or inward to ideas and reflections?
Information Processing
Sensing vs Intuition. Do you focus on concrete facts and details, or patterns and possibilities?
Decision Making
Thinking vs Feeling. Do you make decisions based on logic and analysis, or values and impact on people?
Lifestyle Orientation
Judging vs Perceiving. Do you prefer structure and closure, or flexibility and openness?
Simple. Scientific. Anonymous.
Based on the Open Extended Jungian Type Scales (OEJTS), developed through research with over 25,000 participants. We store anonymous test responses and derived scores for aggregate statistics and research - no names, emails, or accounts.
Start Free TestAnswer 32 Questions
Rate yourself on trait pairs using a simple scale.
Get Your Type
Discover which of the 16 personality types fits you.
Explore Your Results
Read detailed analysis of your strengths and growth areas.
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Frequently Asked Questions
Everything you need to know about the MBTI personality test
What is the MBTI personality test?
The MBTI (Myers-Briggs Type Indicator) is a personality framework based on Carl Jung's 1921 psychological types theory. It measures four dimensions: Energy Direction (E/I), Information Gathering (S/N), Decision Making (T/F), and Lifestyle Orientation (J/P). These combine to form 16 personality types, each with unique cognitive patterns. MBTI is widely used for self-discovery, career planning, and improving relationships.
What are the 16 personality types?
The 16 types are grouped into four categories: Analysts (INTJ, INTP, ENTJ, ENTP) share Intuition and Thinking; Diplomats (INFJ, INFP, ENFJ, ENFP) share Intuition and Feeling; Sentinels (ISTJ, ISFJ, ESTJ, ESFJ) share Sensing and Judging; Explorers (ISTP, ISFP, ESTP, ESFP) share Sensing and Perceiving. Each type has unique value — these reflect preferences, not capabilities.
How accurate is this free MBTI test?
This test uses the Open Extended Jungian Type Scales (OEJTS), validated with over 25,000 participants. Results can be influenced by mood and self-awareness. We display percentage scores for each dimension (not just type codes) because these continuous scores are more meaningful. Treat results as a starting point for self-exploration rather than a definitive label.
Is my data private and secure?
OpenJung is open-source with strict privacy: no names, emails, or account registration. We store anonymized test responses and derived scores for aggregate statistics and research. We use limited analytics (Google Analytics) to understand usage, which you can block with privacy tools. All code is on GitHub for anyone to audit.
How long does the personality test take?
The test has 32 questions and takes 5-10 minutes. Answer based on your true preferences, not how you think you "should" behave. Go with your first instinct — there are no right or wrong answers.
Can my MBTI type change over time?
Core preferences tend to remain stable after adulthood, though you naturally develop more balanced abilities over time. An introvert may develop strong social skills while still recharging through solitude. If results vary between sessions, it may reflect borderline preferences or mood differences — focus on score patterns rather than just the four-letter code.
What's the difference between OEJTS and the official MBTI test?
OEJTS (Open Extended Jungian Type Scales) is a free, open-source alternative to the official MBTI test. Both measure the same four Jungian dimensions. The official MBTI is copyrighted and requires payment; OEJTS is completely free and has been validated through large-scale data collection with solid psychometric properties.
How should I interpret and use my test results?
Use results as a tool for self-exploration, not a limiting label. Note which parts of your type description resonate with you; understand your strengths and blind spots for personal growth. Don't use type as an excuse for behavior or stereotype others. Personality type is one dimension of self-understanding, not the whole picture.
More Than Just a Test
Discover a complete toolkit for understanding yourself and others
MCP Server Integration
Enable AI assistants like Claude to take the MBTI test programmatically via the Model Context Protocol (MCP). Uses Streamable HTTP transport.
Claude Desktop
Add to your configuration file:
~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"openmbti": {
"url": "https://mcp.openmbti.org/mcp"
}
}
}Claude Code
Run this command in your terminal:
claude mcp add openmbti https://mcp.openmbti.org/mcpAvailable Tools
get_questions Get all 32 test questions with bilingual support quick_test Submit all answers at once and get instant results create_session Create a persistent test session Learn more about MCP at modelcontextprotocol.io
ChatGPT GPT
Take the personality test through a conversational experience with our official ChatGPT GPT. Ask questions, get explanations, and receive personalized insights.
OpenJung
Free MBTI-style personality test in ChatGPT
Features
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