Free Text Case Converter — All-in-One
Convert your text between 6 case styles instantly. UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg, iNVERSE. No signup. Browser-only.
A text case converter changes the capitalization of text between standard styles. Notepad AI's converter handles all six common cases in one tool, runs entirely in your browser, and never uploads your text.
Case Style Reference
| Style | Example | When to Use |
|---|---|---|
| UPPERCASE | HELLO WORLD | Headings, emphasis, acronyms |
| lowercase | hello world | Code identifiers, URLs, casual text |
| Title Case | Hello World | Article titles, headings, book names |
| Sentence case | Hello world | Standard body text, paragraphs |
| aLtErNaTiNg | hElLo WoRlD | Memes, ironic emphasis |
| iNVERSE | hELLO wORLD | Undo accidental Caps Lock, stylistic effect |
Single-Mode Converters
Text Case Converter FAQ
What is a text case converter?
A text case converter changes the capitalization style of a piece of text. Notepad AI's converter supports six modes: UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg, and iNVERSE — switchable with one click.
Is the converter free?
Yes — completely free, no signup, no login, no limits on text length. Convert as much text as you like in any mode.
What's the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every word (e.g., 'Quick Brown Fox Jumps Over The Lazy Dog'). Sentence case capitalizes only the first letter of each sentence (e.g., 'Quick brown fox jumps over the lazy dog.'). Title Case is for headings and titles; Sentence case is for body text.
Does it handle small words in Title Case (a, an, the)?
The current Title Case implementation capitalizes every word. AP, MLA, and Chicago style guides each have different rules for which 'small words' stay lowercase — we don't apply any single house style. If you need strict style compliance, manually lowercase small words after conversion.
Is my text private?
Yes. All conversion happens in your browser. No data is uploaded, logged, or tracked.
Does the converter work offline?
Yes. After the page loads, the tool runs entirely in your browser. Works on planes, in airplane mode, anywhere offline.
What's iNVERSE case useful for?
iNVERSE swaps the case of every letter (uppercase becomes lowercase and vice versa). Useful for undoing accidental Caps Lock typos, or for stylistic effect in social media posts.
What's aLtErNaTiNg case?
aLtErNaTiNg case (sometimes called 'mocking SpongeBob case') alternates between lowercase and uppercase letter-by-letter. Popular for memes and ironic emphasis on social media.
Write + Convert in One Editor
Open Notepad AI for a full editor with case conversion, counters, and AI assistance.
Open Notepad AI — Free →