Case Converter: How to Change Text to Uppercase, Title Case, camelCase and More

Retyping text just to fix its capitalisation is one of the small, silent time-wasters of digital life — a headline pasted in ALL CAPS, a title that needs proper capitalisation, a variable name that should be camelCase. A case converter fixes all of it in one click. This guide explains the different text cases, when each is appropriate, and how to convert between them instantly.

The cases you'll actually use

There are more text cases than most people realise, and each has a job:

• UPPERCASE — every letter capital. Good for short emphasis, acronyms, and labels; poor for anything long, because ALL CAPS is genuinely harder to read and reads as shouting.
• lowercase — no capitals at all. A deliberate stylistic choice, and useful for normalising messy input.
• Title Case — The First Letter Of Each Major Word Is Capitalised. The standard for headlines, titles, and headings.
• Sentence case — Only the first word (and proper nouns) is capitalised. The natural style for body text, and increasingly popular for UI labels and headings too.
• camelCase — firstWordLowerThenEachWordCapitalised. A programming convention for variables and functions in many languages.
• PascalCase — LikeCamelCaseButTheFirstWordIsAlsoCapitalised. Used for class and component names.
• snake_case — words_joined_by_underscores. Common in Python, databases, and file names.
• kebab-case — words-joined-by-hyphens. The convention for URLs, CSS classes, and slugs.

How to convert text case in your browser

1. Open the Case Converter.
2. Type or paste your text.
3. Click the case you want — the result appears instantly.
4. Copy it with one click.

Everything happens in your browser, so your text never leaves your device — safe for confidential drafts and client work.

Title Case vs. Sentence case: the one people get wrong

This is the distinction that trips up the most writers. Title Case capitalises the first letter of each significant word: "How to Write a Great Headline." Sentence case capitalises only the first word and any proper nouns: "How to write a great headline."

Which is correct? It depends on your style guide. Traditional publishing and many marketing teams use Title Case for headlines. But a growing number of brands, tech companies, and publications prefer Sentence case everywhere, arguing it's cleaner, more modern, and easier to read. The important thing is consistency — pick one and apply it across all your headings. A converter makes switching an entire document's style trivial if you change your mind.

Why programmers care about case

If you don't write code, the programming cases can look arbitrary — but they're conventions that keep large codebases readable. Different languages and contexts expect different cases: a JavaScript variable is typically camelCase, a React component is PascalCase, a Python variable is snake_case, and a CSS class or URL slug is kebab-case. Converting a plain phrase like "user profile image" into userProfileImage, UserProfileImage, user_profile_image, or user-profile-image by hand is fiddly and error-prone. A case converter does it instantly and correctly, which is why developers keep one within reach.

Practical uses beyond writing

• Fixing pasted text. Someone sends a title in ALL CAPS; convert it to Title or Sentence case in a second.
• Normalising data. Cleaning up inconsistent capitalisation in a list of names or entries.
• Creating slugs and file names. Turn "My Blog Post Title" into my-blog-post-title for a URL or my_blog_post_title for a file.
• Writing code. Convert descriptive phrases into correctly-cased identifiers.
• Social media. Match a platform's or brand's capitalisation style quickly.

A note on accuracy

Automatic case conversion is smart but not psychic. Title Case, for instance, doesn't always know that small words like "of" and "the" are often left lowercase in strict style guides, and it can't know which words are proper nouns in Sentence case. Treat the output as a fast, near-perfect first pass, then glance over anything with names or unusual capitalisation. For the vast majority of text, it's exactly right.

Related tools

• Word Counter — count words, characters, and reading time.
• Slug Generator — turn a title into a clean URL slug.
• Remove Line Breaks — tidy up messy pasted text.
• Text to Speech — hear your text read aloud.

Common questions

What cases can it convert to? UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, and kebab-case.

Is my text sent anywhere? No. All conversion happens in your browser, so your text stays on your device.

What's the difference between Title and Sentence case? Title Case capitalises each major word; Sentence case capitalises only the first word of each sentence (plus proper nouns).

Can I copy the result quickly? Yes — one click copies the converted text, ready to paste.

Will it correctly leave small words lowercase in Title Case? It capitalises each word for simplicity; if you follow a strict style that lowercases words like "and" or "the," give the result a quick manual check.

The bottom line

Whether you're fixing a shouty headline, choosing between Title and Sentence case, or turning a phrase into a code-friendly identifier, a case converter saves you from retyping. Convert text between every common case instantly and privately with our Case Converter.

---

Prime Webkit builds free tools like this, and develops web apps where clean, well-handled text is part of the product. If you're building something that processes writing or data, our app team can help.