텍스트 대소문자 온라인 변환
Type or paste below — output updates as you type.
대문자, 소문자, 타이틀, 문장, camelCase, snake_case, kebab-case 등을 브라우저에서 즉시 변환. 무료.
Supported case formats
Pick a format to see the result update instantly. Line breaks are kept for text-style conversions.
- UPPERCASE — every letter A–Z becomes capital.
- lowercase — every letter becomes small.
- Title Case — each word’s first letter is capitalized (simple algorithm; not style-guide perfect for names or acronyms).
- Sentence case — text is lowercased, then the first letter and the first letter after . ! ? (when more text follows) are capitalized.
- Capitalize Each Word — same word-based rule as Title Case in this tool.
- aLtErNaTiNg cAsE — only letters alternate upper/lower; digits and punctuation do not consume a step, so the pattern can continue across them.
- Inverse Case — swap upper and lower for each letter.
- snake_case — words become lowercase tokens joined with underscores.
- kebab-case — words become lowercase tokens joined with hyphens.
- camelCase — first word lowercase, following words capitalized and joined (no spaces).
How to convert text case online
- Paste or type your text in the input area.
- Tap a case format — the output updates immediately.
- Use Copy output to grab the result, or Use output as input to chain conversions.
- Clear resets the tool.
Common use cases
- Writers and editors fixing headings, titles, or inconsistent caps in drafts.
- Students reformatting notes or citations without retyping.
- Developers turning phrases into variable names, keys, or URL slugs.
Privacy
All conversions run in your browser. Nothing is sent to a server after the page loads.
자주 묻는 질문
What does this text case converter do?
It reformats your text into common case styles—like ALL CAPS, all lowercase, Title Case, or sentence case—plus developer-friendly formats such as snake_case, kebab-case, and camelCase. Everything runs in your browser after the page loads.
Is my text sent to a server?
No. Conversions use JavaScript on your device only. Your text is not uploaded or stored by this tool.
What is Title Case vs Capitalize Each Word?
Here both use the same simple rule: each word (separated by spaces) gets its first letter uppercased and the rest lowercased. This is algorithmic—not perfect for names, acronyms, or every style guide.
How does Sentence case work?
The full text is lowercased first, then the first letter of the text and the first letter after . ! ? (when followed by more text) are capitalized. Spacing and line breaks are kept where possible.
What are snake_case, kebab-case, and camelCase?
They split words from your text into tokens (whitespace and common separators are normalized), then join with underscores, hyphens, or camelCase capitalization. Results are meant for identifiers or slugs, not prose.
Who uses a text case converter?
Writers, students, marketers, and developers use it to fix caps in drafts, prep headings, clean up pasted text, or generate variable names and URLs quickly.