Korean Pronunciation Checker (한국어 표준 발음 변환기)
A tool to check the correct pronunciation of a Korean word based on official Korean pronunciation rules (국립국어원 표준 발음법).
Introduction
We have some exciting news to share with the LKI community.
After months of development, we are thrilled to announce the official launch of the Korean Pronunciation Checker — a free online tool available at koreanpronunciation.com — built by LKI School of Korean Language for Korean learners everywhere.
If you have ever looked at a Korean word and felt unsure about how it is actually supposed to sound, this tool was made for you. Whether you are a beginner just getting started with Hangeul, an intermediate student building your TOPIK vocabulary, or an advanced learner polishing the finer edges of your Korean — the Korean Pronunciation Checker gives you the correct standard pronunciation of any Korean word, instantly and for free.
The Problem We Wanted to Solve
At LKI, we have been teaching Korean since 2009. In all those years, one challenge comes up again and again with almost every student — the gap between how Korean words are written and how they are actually spoken.
Korean has a detailed set of official pronunciation rules maintained by the National Institute of Korean Language (국립국어원), called 표준 발음법 (Standard Pronunciation Rules). These rules govern how consonants and vowels interact across syllable boundaries, how certain consonants change before or after others, and how written forms transform into their spoken equivalents.
The result is that a word like 입학 is not pronounced [입학] — it is pronounced [이팍]. 국물 is not [국물] — it is [궁물]. 닭고기 is not [달고기] — it is [닥꼬기].
These are not exceptions or slang. These are the correct, standard pronunciations as defined by official Korean language authorities. And there are dozens of such rules.
For students, this creates real problems. Dictionaries show the written spelling, not the spoken form. Textbooks explain the rules in theory but don’t always apply them to every word you encounter. And when you are in the middle of a study session and come across an unfamiliar word, there is no quick, reliable way to check — until now.
Introducing the Korean Pronunciation Checker
The Korean Pronunciation Checker at koreanpronunciation.com is a free web-based tool that does one thing exceptionally well: it takes any Korean word you enter and tells you exactly how it should be pronounced according to the official 표준 발음법 of the 국립국어원.
This tool was created by Dr. Satish Satyarthi, founder of LKI School of Korean Language and TOPIK Guide. Dr. Satyarthi holds a PhD in Korean language, is a GKS Scholar from Seoul National University, and has spent over 15 years helping learners around the world master Korean. The pronunciation checker is built on that same foundation of academic rigour and a genuine commitment to making high-quality Korean learning resources accessible to everyone — free of charge.
What the Tool Does
When you enter a Korean word into the Korean Pronunciation Checker, you receive three things:
Phonetic Hangeul — the word written in Hangeul exactly as it sounds when spoken, not as it is spelled. This is the most useful output for learners who are comfortable reading Hangeul and want to see the phonetic transformation clearly.
Revised Romanization of Pronunciation — the phonetic form of the word written in the Revised Romanization system. This helps learners who are still building their Hangeul reading fluency, and also serves as a useful cross-reference.
Pronunciation Rule Explanation — the tool tells you which specific pronunciation rule caused the change. For example, if a word undergoes nasalisation, the tool explains that this is because a stop consonant has assimilated to the nasal consonant that follows it. This is the feature that turns a simple lookup into a genuine learning moment.
You do not need to create an account. You do not need to download anything. The tool works on any device — desktop, tablet, or mobile — and gives you results in seconds.
The Pronunciation Rules the Tool Covers
The Korean Pronunciation Checker handles the full range of standard Korean pronunciation rules, including:
Liaison (연음법칙) — When a syllable ending in a consonant is followed by a syllable beginning with a vowel, the final consonant moves to fill the initial position of the next syllable. For example, 음악 is pronounced [으막].
Nasalisation (비음화) — Stop consonants (ㄱ, ㄷ, ㅂ) become nasal consonants (ㅇ, ㄴ, ㅁ) when they appear before nasal consonants. For example, 작년 is pronounced [장년].
Aspiration (격음화) — When a plain consonant meets ㅎ (in either order), they merge into an aspirated consonant. For example, 좋다 is pronounced [조타] and 입학 is pronounced [이팍].
Tensification (경음화) — Plain consonants become tense (된소리) in certain environments, such as after final consonants in specific conditions. For example, 학교 is pronounced [학꾜].
Lateralisation (유음화) — ㄴ becomes ㄹ when it appears adjacent to ㄹ. For example, 진리 is pronounced [질리] and 신라 is pronounced [실라].
Consonant Cluster Simplification (자음군 단순화) — Korean syllables cannot end in two consonants. When a double final consonant appears, one is dropped according to specific rules. For example, 닭 is pronounced [닥] and 읽다 is pronounced [익따].
Palatalisation (구개음화) — ㄷ and ㅌ become ㅈ and ㅊ respectively when followed by the vowel 이. For example, 굳이 is pronounced [구지] and 같이 is pronounced [가치].
ㄹ Nasalisation — In certain environments, ㄹ becomes ㄴ when following a nasal consonant. For example, 심리 is pronounced [심니].
The tool correctly applies all of these rules — including cases where multiple rules interact with each other in a single word — and explains which rule or combination of rules is at work.
How to Use It
Using the Korean Pronunciation Checker is straightforward:
- Go to koreanpronunciation.com
- Type or paste a Korean word into the input field
- The tool instantly displays the phonetic Hangeul form, the Revised Romanization, and the rule explanation
- Use the result to practice the correct pronunciation and understand why the word sounds the way it does
There is no limit on how many words you can check, and no registration is required. It is completely free.
How This Fits Into Your Korean Study Routine
We designed this tool to be used alongside your regular study materials, not as a replacement for them. Here are a few ways our students and the broader LKI community can make it part of their learning routine:
When you encounter a new vocabulary word — in your textbook, on a flashcard, in a TOPIK practice test — paste it into the checker before adding it to your notes. Write both the standard spelling and the phonetic Hangeul on your flashcard. This way, you are always memorising the correct sound from the very beginning.
When you are preparing for the TOPIK listening section, use the checker on the vocabulary items you are revising. Knowing how words actually sound will help you recognise them when spoken by native speakers at natural speed.
When you are practising speaking or shadowing, use the checker to verify your pronunciation of individual words before working on fluency. Getting individual words right before combining them into sentences is a much more efficient approach.
If you are a student in any of our LKI courses, your teachers may use the checker as a classroom reference during pronunciation lessons. You can also use it independently to review words covered in class.
A Note from Dr. Satish Satyarthi
“One of the most common frustrations I hear from Korean learners, at every level, is that they are not sure how to pronounce words correctly. Textbooks and dictionaries are not always enough. I built the Korean Pronunciation Checker because I wanted learners to have an instant, reliable, academically grounded tool they could reach for at any moment during their study. The fact that it explains the underlying rule, not just the result, is what I am most proud of. Learning a language is not about memorising answers. It is about understanding patterns. I hope this tool helps you build that understanding, one word at a time.”
Try It Now
The Korean Pronunciation Checker is live and free to use today.
Visit koreanpronunciation.com and try it with any Korean word you have been unsure about. We would love to hear your feedback — drop us a message through the LKI website or let us know in the comments below.
If you find the tool useful, please share it with your fellow Korean learners. The more learners who discover it, the better — and sharing it is the best way to support the free resources we continue to build for the Korean learning community.
Happy studying! 공부 열심히 하세요! 😊
The Korean Pronunciation Checker is a free tool developed by LKI School of Korean Language. Visit learnkorean.in to learn more about our Korean language courses, TOPIK preparation, and scholarship guidance.
