Case Converter
Instantly convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and more. Paste your text and click any case — done in one second.
Free Online Case Converter — Instantly Change Text to Any Case Format
Whether you need to fix a heading that was accidentally typed in ALL CAPS, convert an essay title to proper Title Case, or transform variable names to camelCase for a programming assignment, our free online case converter does it instantly. Paste your text, click the case you need and copy the result — no sign-up, no wait, no text leaving your browser.
Our case converter supports 8 standard case formats in Simple Mode and over 14 text transformations in Advanced Mode — covering everything from academic essay formatting to programming conventions, URL slugs and creative text effects. It is one of the most versatile free text tools available for students, developers and content creators worldwide.
Smart Title Case: Unlike basic converters that blindly capitalise every word, our Title Case engine follows proper grammatical rules — automatically keeping minor words like "and", "the", "of", "in", "or" and "for" in lowercase unless they appear at the start or end of the title. This matches the standard used by most universities, style guides and publishers worldwide.
All 8 Case Formats Explained
Each case format has a specific purpose. Here is a complete guide to when and why to use each one:
Where Students Use a Case Converter
Case conversion comes up constantly in student life — from writing essays to submitting coding assignments. Here are the most common situations:
Title Case Rules — What Gets Capitalised?
Many students are confused about which words to capitalise in a title. The standard rule used by most academic style guides worldwide is:
| Word Type | Rule | Example |
|---|---|---|
| First word | Always capitalise | The Great Gatsby |
| Last word | Always capitalise | Gone with the Wind |
| Nouns, verbs, adjectives | Always capitalise | A Brief History of Time |
| Articles (a, an, the) | Lowercase unless first/last | Of Mice and Men |
| Short prepositions (in, on, at, by) | Lowercase | Death on the Nile |
| Coordinating conjunctions (and, but, or) | Lowercase | War and Peace |
Our smart Title Case engine applies all of these rules automatically so you never have to remember them manually. Simply paste your title and click — the correct capitalisation is applied in under a second.
Advanced Mode — Extra Text Transformations
Switch to Advanced Mode to unlock nine additional text transformations beyond the standard cases. These include alternating case (aLtErNaTiNg) for creative and social media content, inverse case which flips uppercase to lowercase and vice versa, CONSTANT_CASE for programming constants, dot.case and path/case for configuration files, and a reverse text function. Advanced Mode also reveals a complete case reference guide in the sidebar showing a real example of every case format side by side — useful when you are unsure which format your coding assignment requires.
The "Use as Input" button in Advanced Mode lets you chain case conversions — move the converted output back to the input box and apply another transformation on top. This is especially useful when converting text that mixes cases, for example first converting to lowercase to flatten everything and then applying Title Case for a clean result.
Frequently Asked Questions
Common questions about our free online case converter
A case converter is a free online tool that changes the capitalisation of your text instantly. Paste your text, click a case type such as UPPERCASE, lowercase, Title Case or Sentence case and the converted result appears immediately ready to copy. Our case converter also supports camelCase, PascalCase, snake_case and kebab-case for programming students.
Title Case capitalises the first letter of every major word and is used for essay headings, book titles and report sections. Sentence case only capitalises the first letter of the first word in each sentence — used for standard essay writing and emails. Our tool applies smart Title Case rules that automatically skip minor words like "and", "the", "or" and "in" unless they appear at the start of the title.
camelCase writes compound words with no spaces where each new word starts with a capital letter except the first — for example myVariableName. Computer science and programming students use camelCase for variable and function names in JavaScript, Java and Swift. PascalCase is similar but capitalises the first word too — for example MyClassName — and is used for class names in Java, C# and Python.
snake_case replaces spaces with underscores and uses all lowercase letters — for example my_variable_name. It is standard in Python programming, database column names and file names. kebab-case uses hyphens instead — for example my-variable-name — and is the convention for CSS class names, HTML IDs and web URL slugs.
Paste your heading text into the input box and click the Title Case button. The tool instantly applies smart capitalisation rules — major words are capitalised while minor words like "and", "the", "of" and "in" stay lowercase unless they appear at the start. The result appears in the output box below ready to copy with one click.
Yes. Use the Use as Input button in Advanced Mode to move the converted result back into the input box, then apply another case conversion on top. For example convert mixed case text to lowercase first to flatten everything, then apply Title Case for a clean and consistent result.
Yes. Our case converter supports up to 2,000 words or 10,000 characters per session, covering standard essays, assignment sections, code blocks and long-form content. All conversions happen instantly inside your browser with no upload, no server processing and no text ever leaving your device.