Text case converter

Four modes in one converter

Uppercase and lowercase use English-locale Unicode case conversion. Title case capitalizes the first grapheme of each word and lowercases the remainder, keeping punctuation and spacing in place.

Simple sentence case first lowercases the input, then capitalizes a letter at the start or after a full stop, question mark or exclamation mark followed by whitespace. It is a text transformation, not a grammar editor: names, acronyms, abbreviations and unusual punctuation may need manual correction.

Preview before pasting

Case changes can change the length of some Unicode text. The tool does not apply a game’s length limit or judge name availability. Check the complete output, especially proper names and words from languages with different capitalization rules.

Local text processing

The input is processed in this browser and is not sent to our servers or included in tool-use analytics. Use up to 20,000 UTF-16 input units at a time. Copy output keeps your original input intact; if clipboard access is blocked, the output is selected for manual copying.

Questions

• Does title case follow a publishing style guide? No. It capitalizes each word mechanically, including short words such as “and” and “the”.
• Will sentence case preserve my acronyms? No. It lowercases the text before applying simple sentence-start capitalization. Review acronyms and proper names yourself.