Text Case Converter
Why use this converter
Switching text between cases by hand is tedious and error-prone, especially for longer passages, titles, or when you've accidentally left caps lock on. This tool converts instantly and runs entirely client-side, so nothing you type leaves your browser.
Result
Result appears here.
The four case styles
- UPPERCASE — every letter capitalized. Used for emphasis, acronyms, or shouting (use sparingly).
- lowercase — every letter in lowercase. Useful for normalizing usernames, slugs, or tags.
- Title Case — capitalizes most words, following standard headline style (small words like "of", "the", "and" stay lowercase unless first).
- Sentence case — only the first letter of each sentence is capitalized, like normal writing.
When each style matters
Title Case is the convention for headlines, book and article titles, and UI buttons. Sentence case is standard for body text and most user-facing copy. Getting this consistent across a document or website is a small detail that affects how polished it reads.
Frequently asked questions
- What's the difference between Title Case and Sentence case?
- Title Case capitalizes the first letter of most words (skipping small words like "a", "the", "of" unless they're first), which is standard for headlines and titles. Sentence case only capitalizes the first letter of each sentence, like normal prose.
- Does this tool send my text anywhere?
- No — the conversion happens entirely in your browser using JavaScript. Your text is never sent to a server, which matters if you're working with sensitive or private text.
- Why do some small words stay lowercase in Title Case?
- Standard title-casing rules (used in headlines, book titles, and APA/MLA style) keep short function words like "a", "an", "and", "the", "of", "in" lowercase unless they're the first word — this matches common style guide conventions rather than capitalizing every single word.