🔠 Text Case Converter
Convert text to UPPERCASE, lowercase, Title Case and more in one click. Useful for cleaning up headings, code or pasted text. Free, unlimited, private — works entirely in your browser.
How to use
- Paste or type your text into the input box — any length works, from a single word to a full document.
- Pick a case style: UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg, or InVeRsE.
- Click the convert button for your chosen style — the result appears instantly in the output box.
- Copy the converted text with one click, or download it as a .txt file.
FAQ
Is it really free?
Yes — every tool on this site is 100% free with no limits, no signup and no watermarks.
Is my data private?
Absolutely. All processing happens locally in your browser. Your files are never uploaded to any server.
What is Title Case and how does it handle small words?
Title Case capitalises the first letter of each major word. Our converter follows common style-guide practice: articles, short prepositions, and conjunctions (a, an, the, and, of, in, on) stay lowercase unless they are the first or last word — matching Chicago and AP style conventions.
What is the difference between Sentence case and Title Case?
Sentence case capitalises only the first letter of each sentence (like normal prose), while Title Case capitalises most words. Use Sentence case for body text and descriptions; use Title Case for headlines, titles, and headings.
Can it convert programming identifiers like camelCase or snake_case?
Yes. Paste camelCase, PascalCase, snake_case, or kebab-case identifiers and convert them to readable spaced text, or go the other way — handy when writing documentation from code, or cleaning up variable names for display.
Will it preserve line breaks and paragraphs?
Yes. The converter only changes letter casing and leaves all whitespace, line breaks, numbers, and punctuation exactly as they were, so multi-paragraph documents keep their structure.
📘 Complete Guide to Text Case Styles
Letter case is one of those invisible details that signals professionalism: a headline in proper Title Case looks intentional, while random cApItAlIsAtIoN looks like an accident. Writers, marketers, developers, and students all hit case-conversion chores regularly. This guide covers every major case style, when to use each, and the tricky edge cases.
The core styles
UPPERCASE: Everything capitalised. Use sparingly — for short labels, warnings, or legal headings. Whole sentences in caps read as shouting online and are harder to scan. lowercase: Everything small. Common in modern branding, poetry, and informal contexts — plus normalising data before comparison. Title Case: Most words capitalised. The standard for headlines, book titles, and article headings in American English. Sentence case: Only the first word (and proper nouns) capitalised. The default for body text and increasingly popular for modern headlines. Alternating (aLtErNaTiNg): Every other letter flipped — pure internet-meme energy, the "mocking SpongeBob" style. Inverse: Flips the case of every letter — useful for fixing text typed with Caps Lock accidentally on.
Programmer cases
Developers live in case styles: camelCase (firstWordLowerRestUpper) dominates JavaScript; PascalCase (EveryWordCapitalised) for classes; snake_case (words_separated_by_underscores) for Python and databases; kebab-case (words-separated-by-hyphens) for URLs and CSS; SCREAMING_SNAKE_CASE for constants. Converting between these by hand is error-prone; a converter does it in one click.
Tricky edge cases
Apostrophes ("don't", "it's"), hyphenated words ("well-known"), and names with internal capitals ("McDonald", "iPhone") can all trip up naive converters. Acronyms (NASA, HTML) arguably should stay fully capitalised in Title Case. Our converter uses sensible rules for the common cases, but always proofread proper nouns in the output — no algorithm knows every brand name.
Practical uses
Fixing pasted text from PDFs that came out ALL CAPS, normalising spreadsheet columns before a mail merge, formatting video titles, cleaning up essay headings to match a style guide, generating URL slugs from headlines, and rescuing documents typed with Caps Lock stuck on. Writers: pick one headline style per project and stick to it — consistency beats cleverness.
Privacy note
All conversion happens in your browser. Drafts, manuscripts, and private notes never leave your device.