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Romaji Conversion

Romaji conversion tool. Convert Japanese text to multiple romaji systems (Hepburn, Station, Nihon, Kunrei). You can process text up to 10,000 characters.

Text

How to use

About this tool

Converts Japanese text to romaji (e.g. Hepburn). Supports hiragana, katakana, and kanji readings.

How to use

Enter Japanese text; the romaji output is shown.

Use cases

• Passport spelling • Materials for non-Japanese readers • Romanization for search keywords

FAQ

Q: What case formats does this tool support?
A: lowercase, UPPERCASE, snake_case, SCREAMING_SNAKE_CASE, camelCase, PascalCase, kebab-case, Title Case, APA Title Case, Sentence case, Train-Case, and dot.case — 12 formats in total, all generated simultaneously.
Q: Is there a character limit for the input?
A: The input is limited to 10,000 characters (100 KB when loading from a file). For longer texts, split them into multiple parts.
Q: What is the difference between Title Case and APA Title Case?
A: Title Case capitalizes every word. APA Title Case follows APA style and keeps short conjunctions, prepositions, and articles (e.g., "and", "in", "the") in lowercase unless they are the first word.
Q: What is SCREAMING_SNAKE_CASE used for?
A: It is commonly used for constants in languages such as Python (e.g., MAX_RETRY_COUNT) and JavaScript/TypeScript (e.g., API_BASE_URL).
Q: Does this tool send my text to a server?
A: No. All conversion is performed in the browser using JavaScript. Your text is never sent to any server.