Text Case Converter - Free Online Full-width / Case Converter
0 chars
Full / Half width
Letter case
Naming case
Kana
About Text Case Converter
Text Case Converter is a free online tool that instantly converts text between full-width and half-width, UPPERCASE and lowercase, camelCase / snake_case / kebab-case, and Hiragana and Katakana. Perfect for cleaning up form input, unifying naming conventions in code, and fixing inconsistent Japanese text. Copy the result with one click — all processing happens entirely in your browser.
How to Use
- Enter or paste the text you want to convert into the text area
- Click a conversion button such as "Full-width → Half-width", "UPPERCASE", or "snake_case"
- The converted text appears in the result area in real time
- Copy the result, or click "Use as input" to keep converting
Frequently Asked Questions
- What conversions are supported?
- Full-width ⇔ half-width, UPPERCASE ⇔ lowercase, Title Case, camelCase / snake_case / kebab-case, and Hiragana ⇔ Katakana.
- Does it handle half-width katakana?
- Yes. The full-width/half-width conversion handles alphanumerics, symbols, and katakana (including dakuten and handakuten) in both directions.
- Is my text sent to a server?
- No, all processing happens locally in your browser. No text is ever sent to a server.
- Is there a character limit?
- Processing happens in-browser, so there is no practical limit for everyday use.