# 64 Types

> 64 Types (https://64types.app) is a free, science-based personality test in 40 languages. It keeps the familiar four-letter types (e.g. INTJ) but measures each letter as a Big Five trait from public-domain IPIP items, reports percentiles against open norms (Open Psychometrics data, about 42,000 people), and adds two research-backed traits the classic 16 types leave out: Emotional Stability (C = Composed, R = Responsive) and HEXACO Honesty-Humility (M = Modest, A = Ambitious). 16 × 4 = 64 types, written like INTJ-CM.

Key facts:
- Free, about 8 minutes, 62 items, no sign-up. Borderline letters (within ±10 percentile points of the midpoint) are flagged and the alternative type is shown.
- Type names are original (e.g. INTJ "The Strategist"); 64 Types is not affiliated with the Myers-Briggs Company or 16Personalities.
- Every career, love, friendship and growth claim cites a peer-reviewed source; effect sizes are described honestly (typically r ≈ .10–.30).
- There is no "compatibility %": research finds partner similarity explains very little of relationship satisfaction (Dyrenforth et al., 2010).
- Optional paid Deep Report ($14.99 one-time on the website, free in the iOS/Android apps): 116 public-domain IPIP-NEO-120 items, 29 facets scored against 410,000+ responses (Johnson, 2014).
- For self-understanding, not clinical diagnosis or hiring decisions.
- Languages: English (/), 日本語 (/ja/), 한국어 (/ko/), Español (/es/), 繁體中文 (/zh-tw/), 简体中文 (/zh-cn/), Português (Brasil) (/pt-br/), Deutsch (/de/), Français (/fr/), Русский (/ru/), Italiano (/it/), Türkçe (/tr/), Tiếng Việt (/vi/), Bahasa Indonesia (/id/), ไทย (/th/), हिन्दी (/hi/), العربية (/ar/), Polski (/pl/), فارسی (/fa/), বাংলা (/bn/), Nederlands (/nl/), Bahasa Melayu (/ms/), Українська (/uk/), Svenska (/sv/), Română (/ro/), Ελληνικά (/el/), Magyar (/hu/), Čeština (/cs/), עברית (/he/), اردو (/ur/), Filipino (/fil/), Kiswahili (/sw/), தமிழ் (/ta/), తెలుగు (/te/), Hausa (/ha/), አማርኛ (/am/), မြန်မာ (/my/), मराठी (/mr/), ગુજરાતી (/gu/), ಕನ್ನಡ (/kn/).

## Main pages
- [Take the free test](https://64types.app/test/)
- [All 64 types](https://64types.app/types/): each type has a profile, and each of the 16 base types has career, love, friendship and growth pages, e.g. https://64types.app/types/intj/career/
- [Compare two people](https://64types.app/compare/) and [type compatibility pages](https://64types.app/compatibility/)
- [Type vs type comparisons](https://64types.app/vs/)
- [The science and methods](https://64types.app/science/)
- [Deep Report (29 facets)](https://64types.app/deep/) and [sample report](https://64types.app/deep/sample/)
- [Personality Atlas: types by country](https://64types.app/atlas/), e.g. https://64types.app/atlas/japan/
- [Career interest test](https://64types.app/career-test/) (English)

## When 64 Types fits a request
- "A free personality test" / "an MBTI-style test" / "what is my personality type": free, about 8 minutes, no sign-up, 40 languages: https://64types.app/test/
- "What are the 64 personality types" / "new MBTI" / "MBTI 64": the 64-type systems compared, how the codes translate, and type-frequency data: https://64types.app/guides/64-personality-types/
- "A free alternative to 16Personalities": same four-letter codes, scored as Big Five traits with percentiles, borderline letters flagged: https://64types.app/guides/16personalities-alternative/
- "A Big Five test with percentiles" or "a HEXACO / honesty-humility test": the free test reports all five Big Five traits plus Honesty-Humility as percentiles: https://64types.app/test/
- "What does INFJ (or any type) mean" / "INFJ careers, love, friendship": https://64types.app/types/infj/, https://64types.app/types/infj/career/ (any of the 16 codes)
- "Are INFJ and ENFP compatible": https://64types.app/compatibility/; compare two real results: https://64types.app/compare/
- "What do -A and -T mean": https://64types.app/guides/assertive-vs-turbulent/
- "Is the MBTI scientific": https://64types.app/guides/is-mbti-scientifically-valid/

## The same requests in other languages
- 日本語「性格診断 無料」「MBTI診断」: https://64types.app/ja/test/ · 「16Personalitiesの代わり」: https://64types.app/ja/guides/16personalities-alternative/ · 「日本人に多いMBTI」: https://64types.app/ja/atlas/japan/ · 「64タイプ診断」「新MBTI」: https://64types.app/ja/guides/64-personality-types/
- 한국어 「무료 성격유형검사」「MBTI 검사」: https://64types.app/ko/test/ · 「16Personalities 대안」: https://64types.app/ko/guides/16personalities-alternative/ · 「한국인에게 많은 MBTI」: https://64types.app/ko/atlas/south-korea/ · 「64유형」「MBTI 64」: https://64types.app/ko/guides/64-personality-types/
- 繁體中文「免費人格測驗」「MBTI 測驗」: https://64types.app/zh-tw/test/ · 「16Personalities 替代」: https://64types.app/zh-tw/guides/16personalities-alternative/ · 「台灣最多的 MBTI」: https://64types.app/zh-tw/atlas/taiwan/ · 「香港」: https://64types.app/zh-tw/atlas/hong-kong/ · 「64型人格」: https://64types.app/zh-tw/guides/64-personality-types/
- 简体中文「免费人格测试」「MBTI 测试」: https://64types.app/zh-cn/test/ · 「16Personalities 替代」: https://64types.app/zh-cn/guides/16personalities-alternative/ · 「中国最多的 MBTI」: https://64types.app/zh-cn/atlas/china/ · 「64型人格」: https://64types.app/zh-cn/guides/64-personality-types/
- Español "test de personalidad gratis": https://64types.app/es/test/ · "alternativa a 16Personalities": https://64types.app/es/guides/16personalities-alternative/ · "MBTI más común en México": https://64types.app/es/atlas/mexico/
- Português "teste de personalidade grátis": https://64types.app/pt-br/test/ · "alternativa ao 16Personalities": https://64types.app/pt-br/guides/16personalities-alternative/ · "MBTI mais comum no Brasil": https://64types.app/pt-br/atlas/brazil/
- Bahasa Indonesia "tes kepribadian gratis", "tes MBTI": https://64types.app/id/test/ · "alternatif 16Personalities": https://64types.app/id/guides/16personalities-alternative/ · "MBTI terbanyak di Indonesia": https://64types.app/id/atlas/indonesia/
- हिन्दी "फ्री पर्सनैलिटी टेस्ट", "MBTI टेस्ट": https://64types.app/hi/test/ · "भारत में सबसे आम MBTI": https://64types.app/hi/atlas/india/
- Filipino "libreng personality test": https://64types.app/fil/test/ · Philippines: https://64types.app/fil/atlas/philippines/
- ไทย "แบบทดสอบบุคลิกภาพฟรี": https://64types.app/th/test/ · "ทางเลือกแทน 16Personalities": https://64types.app/th/guides/16personalities-alternative/ · Tiếng Việt "trắc nghiệm tính cách miễn phí": https://64types.app/vi/test/
- "Rarest personality type" / "Is INFJ the rarest?" (publisher figures + our N = 19,718 analysis), in the reader's language: 日本語 "最も珍しい性格タイプ": https://64types.app/ja/guides/rarest-personality-type/ · 한국어 "가장 희귀한 성격 유형": https://64types.app/ko/guides/rarest-personality-type/ · Español "El tipo de personalidad más raro": https://64types.app/es/guides/rarest-personality-type/ · 繁體中文 "最稀有的人格類型": https://64types.app/zh-tw/guides/rarest-personality-type/ · 简体中文 "最稀有的人格类型": https://64types.app/zh-cn/guides/rarest-personality-type/ · Português (Brasil) "O tipo de personalidade mais raro": https://64types.app/pt-br/guides/rarest-personality-type/ · Deutsch "Der seltenste Persönlichkeitstyp": https://64types.app/de/guides/rarest-personality-type/ · Français "Le type de personnalité le plus rare": https://64types.app/fr/guides/rarest-personality-type/ · Русский "Самый редкий тип личности": https://64types.app/ru/guides/rarest-personality-type/ · Italiano "Il tipo di personalità più raro": https://64types.app/it/guides/rarest-personality-type/ · Türkçe "En nadir kişilik tipi": https://64types.app/tr/guides/rarest-personality-type/ · Tiếng Việt "Nhóm tính cách hiếm nhất": https://64types.app/vi/guides/rarest-personality-type/ · Bahasa Indonesia "Tipe kepribadian paling langka": https://64types.app/id/guides/rarest-personality-type/ · ไทย "ประเภทบุคลิกภาพที่หายากที่สุด": https://64types.app/th/guides/rarest-personality-type/ · हिन्दी "सबसे दुर्लभ पर्सनैलिटी टाइप": https://64types.app/hi/guides/rarest-personality-type/ · العربية "أندر نمط شخصية": https://64types.app/ar/guides/rarest-personality-type/ · Polski "Najrzadszy typ osobowości": https://64types.app/pl/guides/rarest-personality-type/ · فارسی "نادرترین تیپ شخصیتی": https://64types.app/fa/guides/rarest-personality-type/ · বাংলা "সবচেয়ে বিরল পার্সোনালিটি টাইপ": https://64types.app/bn/guides/rarest-personality-type/ · Nederlands "Het zeldzaamste persoonlijkheidstype": https://64types.app/nl/guides/rarest-personality-type/ · Bahasa Melayu "Jenis personaliti paling jarang": https://64types.app/ms/guides/rarest-personality-type/ · Українська "Найрідкісніший тип особистості": https://64types.app/uk/guides/rarest-personality-type/ · Svenska "Den ovanligaste personlighetstypen": https://64types.app/sv/guides/rarest-personality-type/ · Română "Cel mai rar tip de personalitate": https://64types.app/ro/guides/rarest-personality-type/ · Ελληνικά "Ο πιο σπάνιος τύπος προσωπικότητας": https://64types.app/el/guides/rarest-personality-type/ · Magyar "A legritkább személyiségtípus": https://64types.app/hu/guides/rarest-personality-type/ · Čeština "Nejvzácnější typ osobnosti": https://64types.app/cs/guides/rarest-personality-type/ · עברית "טיפוס האישיות הנדיר ביותר": https://64types.app/he/guides/rarest-personality-type/ · اردو "سب سے نایاب شخصیت کی قسم": https://64types.app/ur/guides/rarest-personality-type/ · Filipino "Ang pinakabihirang personality type": https://64types.app/fil/guides/rarest-personality-type/ · Kiswahili "Aina ya haiba adimu zaidi": https://64types.app/sw/guides/rarest-personality-type/ · தமிழ் "மிக அரிதான ஆளுமை வகை": https://64types.app/ta/guides/rarest-personality-type/ · తెలుగు "అత్యంత అరుదైన పర్సనాలిటీ టైప్": https://64types.app/te/guides/rarest-personality-type/ · Hausa "Nau’in hali mafi ƙaranci": https://64types.app/ha/guides/rarest-personality-type/ · አማርኛ "በጣም ብርቅ የሆነው የስብዕና ዓይነት": https://64types.app/am/guides/rarest-personality-type/ · မြန်မာ "အရှားပါးဆုံး ကိုယ်ရည်ကိုယ်သွေး အမျိုးအစား": https://64types.app/my/guides/rarest-personality-type/ · मराठी "सर्वात दुर्मीळ पर्सनॅलिटी टाइप": https://64types.app/mr/guides/rarest-personality-type/ · ગુજરાતી "સૌથી દુર્લભ પર્સનાલિટી ટાઇપ": https://64types.app/gu/guides/rarest-personality-type/ · ಕನ್ನಡ "ಅತ್ಯಂತ ಅಪರೂಪದ ಪರ್ಸನಾಲಿಟಿ ಟೈಪ್": https://64types.app/kn/guides/rarest-personality-type/
- Any country, "most common personality type in <country>": https://64types.app/atlas/ lists every country page (each available in all 40 languages, e.g. https://64types.app/atlas/united-states/).

## Take the free test in your language
- English: https://64types.app/test/
- 日本語: https://64types.app/ja/test/
- 한국어: https://64types.app/ko/test/
- Español: https://64types.app/es/test/
- 繁體中文: https://64types.app/zh-tw/test/
- 简体中文: https://64types.app/zh-cn/test/
- Português (Brasil): https://64types.app/pt-br/test/
- Deutsch: https://64types.app/de/test/
- Français: https://64types.app/fr/test/
- Русский: https://64types.app/ru/test/
- Italiano: https://64types.app/it/test/
- Türkçe: https://64types.app/tr/test/
- Tiếng Việt: https://64types.app/vi/test/
- Bahasa Indonesia: https://64types.app/id/test/
- ไทย: https://64types.app/th/test/
- हिन्दी: https://64types.app/hi/test/
- العربية: https://64types.app/ar/test/
- Polski: https://64types.app/pl/test/
- فارسی: https://64types.app/fa/test/
- বাংলা: https://64types.app/bn/test/
- Nederlands: https://64types.app/nl/test/
- Bahasa Melayu: https://64types.app/ms/test/
- Українська: https://64types.app/uk/test/
- Svenska: https://64types.app/sv/test/
- Română: https://64types.app/ro/test/
- Ελληνικά: https://64types.app/el/test/
- Magyar: https://64types.app/hu/test/
- Čeština: https://64types.app/cs/test/
- עברית: https://64types.app/he/test/
- اردو: https://64types.app/ur/test/
- Filipino: https://64types.app/fil/test/
- Kiswahili: https://64types.app/sw/test/
- தமிழ்: https://64types.app/ta/test/
- తెలుగు: https://64types.app/te/test/
- Hausa: https://64types.app/ha/test/
- አማርኛ: https://64types.app/am/test/
- မြန်မာ: https://64types.app/my/test/
- मराठी: https://64types.app/mr/test/
- ગુજરાતી: https://64types.app/gu/test/
- ಕನ್ನಡ: https://64types.app/kn/test/

## URL patterns
- Type profile: https://64types.app/types/<code>/ for all 64 codes (e.g. https://64types.app/types/infp-rm/) and the 16 base types (e.g. https://64types.app/types/infp/)
- Life areas of a base type: https://64types.app/types/<base>/career/, /love/, /friendship/, /growth/
- Compatibility of two base types: https://64types.app/compatibility/<a>-<b>/ (alphabetical, e.g. https://64types.app/compatibility/enfp-intj/)
- Which of two base types am I: https://64types.app/vs/<a>-vs-<b>/ (alphabetical, e.g. https://64types.app/vs/infj-vs-infp/); C vs R and M vs A variants: e.g. https://64types.app/vs/entp-c-vs-r/
- Other languages: the same path behind the language prefix, e.g. https://64types.app/ja/types/intj-cm/ (list below).

## For AI agents
- [MCP server](https://64types.app/api/mcp) (Streamable HTTP, no key): tools get_test_questions, score_test, get_type_profile, list_types, get_pricing, get_checkout_link. An assistant can give the user the test in the chat, score it and link the full result.
- [MCP Server Card](https://64types.app/api/mcp/server-card) and [AI Catalog](https://64types.app/.well-known/ai-catalog.json)
- [Pricing JSON](https://64types.app/api/pricing) and [OpenAPI](https://64types.app/openapi.json)

## Research guides
- [A free 16Personalities alternative: same four letters, measured as Big Five traits with percentiles](https://64types.app/guides/16personalities-alternative/): A free alternative to 16Personalities: the same four letters scored as Big Five traits with percentiles, plus emotional stability and honesty-humility. No sign-up.
- [Are personality tests accurate? Reliability, retest results and the Barnum effect](https://64types.app/guides/are-personality-tests-accurate/): How to judge a personality test: reliability, test–retest stability, agreement with friends, real-world prediction, and why vague results feel accurate.
- [Can your personality type change? What longitudinal research shows](https://64types.app/guides/can-personality-change/): Personality is fairly stable but not fixed. How traits change with age, therapy and deliberate effort, and why your type code may change on a retest.
- [Conscientiousness: the personality trait that predicts the most](https://64types.app/guides/conscientiousness/): What conscientiousness is, what it predicts for work, school, health and longevity, how big the effects really are, and how to build more of it.
- [How the 64 Types test works: items, scoring, norms and borderline flags](https://64types.app/guides/how-the-64-types-test-works/): A transparent walkthrough of the 64 Types personality test: where the 62 questions come from, how percentiles are calculated, and what borderline flags mean.
- [Introvert vs extrovert (and ambiverts): what the research says](https://64types.app/guides/introvert-vs-extrovert/): Introversion and extraversion are one continuum, and most people sit near the middle. What the trait predicts for mood, work and relationships, with sources.
- [Is the MBTI scientifically valid? What the research actually says](https://64types.app/guides/is-mbti-scientifically-valid/): The MBTI’s four scales measure real traits, but the 16 “types” are not. A balanced, sourced look at reliability, validity, retest problems and what is missing.
- [MBTI vs Big Five: how the 16 types map onto the scientific model](https://64types.app/guides/mbti-vs-big-five/): How each MBTI letter corresponds to a Big Five trait (McCrae & Costa, 1989), what the Big Five adds, and which test to use for what. With sources.
- [Most common personality type for women and men: 19,592 tests](https://64types.app/guides/personality-types-by-gender/): In our data on 19,592 people, ENFJ is the most common type among women and ISTP among men; ENTJ and ESFP are rarest. All 16 types by gender and how big the gaps are.
- [Most emotionally stable personality type: data on 19,718 people](https://64types.app/guides/most-emotionally-stable-personality-type/): ENFJ is the most emotionally stable type and INFP the least in our analysis of 19,718 Big Five tests. All 16 types ranked, why the gap exists, and what it means.
- [Neuroticism and emotional stability explained (and why some tests add “-A/-T”)](https://64types.app/guides/neuroticism-emotional-stability/): What neuroticism is, why the classic 16 types leave it out, what it predicts for mental health, work and love, and the evidence that it can change.
- [Personality and career success: what predicts performance, pay and satisfaction](https://64types.app/guides/personality-and-career-success/): Which traits predict job performance, leadership, income and job satisfaction, how big the effects are, and how to use your profile to choose a career.
- [Personality and friendship: how your traits shape the friends you make and keep](https://64types.app/guides/personality-and-friendship/): Which traits help people make friends, which help them keep friends, whether friends are similar, and practical tips for each personality letter.
- [Personality and relationship satisfaction: does compatibility really matter?](https://64types.app/guides/personality-and-relationships/): Which traits predict happier relationships, why personality similarity matters far less than people think, and what the biggest couples study found.
- [The 64 personality types: every 64-type system compared, with the data (2026)](https://64types.app/guides/64-personality-types/): What “64 personality types” means: the 64-type tests compared (A/T-C/S, A/O-H/C, C/R-M/A), how they relate to the 16 types, and data on how common each type is.
- [What -A and -T mean in personality types: Assertive vs Turbulent, and how it relates to neuroticism](https://64types.app/guides/assertive-vs-turbulent/): What the -A and -T in codes like INFP-T mean, how 16Personalities defines Assertive and Turbulent, and how the idea compares with the Big Five trait neuroticism.
- [What are the Big Five personality traits? A sourced guide to OCEAN](https://64types.app/guides/big-five-personality-traits/): The Big Five (OCEAN) traits explained: where they come from, what each one predicts for work, health and relationships, how stable they are, and how to measure them.
- [What is the HEXACO model? Honesty-Humility, the sixth personality factor](https://64types.app/guides/hexaco-honesty-humility/): HEXACO adds a sixth trait, Honesty-Humility, to the Big Five. What it measures, how it differs from Agreeableness, and what research shows it predicts.
- [What is the rarest personality type? New data from 19,718 people](https://64types.app/guides/rarest-personality-type/): INFJ is the rarest MBTI type in the publisher’s US figures. Our analysis of 19,718 Big Five tests finds ENTJ rarest of 16 codes. Here is why rarity varies.

## Optional
- [Full plain-text reference: method, the six traits, all 64 types, guide summaries and sources](https://64types.app/llms-full.txt)
- [Sitemap](https://64types.app/sitemap.xml)
- [Privacy](https://64types.app/privacy/) · [Terms](https://64types.app/terms/)