Live

English letter case converter

Switch English to upper, lower, capitalize, sentence, or APA-like title case online; optional glossary to keep product names intact — useful for papers, decks, and code comments.

0 / 200000 characters

Input

Output

Transform

Auto-copy result after changeRequires clipboard permission in the browser.Show result in a separate panelWhen off, output appears below the input.Preserve glossary words as-isApplies to capitalize, sentence, and title modes; one word per line or comma-separated.

Sentence case capitalizes the first letter at the start and after . ! ? : (with optional spaces).

Title case capitalizes the first and last words; short articles, conjunctions, and prepositions stay lowercase in the middle (APA-style list).