Free Online Case Converter — UPPERCASE, lowercase, Title Case, camelCase & More
Received an ALL CAPS email and need to make it readable? Writing code and need to switch between camelCase and snake_case? Pasting text from a PDF that has inconsistent capitalization? Formatting a headline and need proper title case? The Case Converter on ConvertLinx handles every text case transformation instantly — paste your text, click a button, copy the result.
Supported Case Conversions
- UPPERCASE: Every character converted to capital letters — LIKE THIS
- lowercase: Every character converted to small letters — like this
- Title Case: First letter of every major word capitalized — Like This (following standard title case rules)
- Sentence case: Only the first word of each sentence capitalized — Like this. And this.
- Alternating case: Characters alternate between upper and lower — lIkE tHiS
- camelCase: Words joined, first word lowercase, subsequent words capitalized — likeThis
- PascalCase: Like camelCase but first word also capitalized — LikeThis
- snake_case: Words joined with underscores, all lowercase — like_this
- kebab-case: Words joined with hyphens, all lowercase — like-this
How to Use the Case Converter
- Go to the Case Converter
- Paste or type your text into the input field
- Click the target case button (UPPERCASE, Title Case, camelCase, etc.)
- Copy the converted text with one click
When Each Case Style Is Used
UPPERCASE: Headings for emphasis, acronyms, certain legal documents, all-caps design elements, button labels in some UI patterns, warning messages.
lowercase: Casual writing, social media, code variables in some languages, email addresses, domain names, URL paths.
Title Case: Article headlines, book titles, movie titles, job titles in formal contexts, navigation menu items, section headings in formal documents. The standard rule: capitalize all words except articles (a, an, the), coordinating conjunctions (and, but, or), and prepositions under 5 letters — unless they're the first or last word.
Sentence case: Body text, email subjects, UI labels, most digital content. Easier to read than title case for long text. Modern UI design tends to use sentence case rather than title case for interface elements.
camelCase: JavaScript and TypeScript variable names, function names, object properties. Example: getUserData(), isLoggedIn, firstName.
PascalCase: Class names in most programming languages, component names in React. Example: UserProfile, NavBarComponent, DatabaseConnection.
snake_case: Python variable and function names, database column names, file names in many contexts. Example: get_user_data(), is_logged_in, first_name.
kebab-case: CSS class names, HTML attributes, URL slugs, file names in web projects. Example: .nav-bar-item, user-profile.html, /blog/how-to-convert-images.
Title Case Rules in Detail
There are several competing style guides for title case, and they disagree on details. The main ones:
AP Style (journalism): Capitalize words of 4 or more letters. Capitalize all verbs including "Is," "Are," "Be." Lowercase: a, an, and, at, but, by, for, in, nor, of, on, or, so, the, to, up, yet.
Chicago Manual of Style: Similar to AP but with specific rules about hyphenated compounds and phrasal verbs. "Shut Down" vs "Shut-down" depends on usage.
APA Style: Capitalize the first word, proper nouns, and the first word after a colon. Most other words lowercase.
For web content and marketing, AP Style title case is the most common standard. The Case Converter applies standard title case rules that match AP guidelines.
Fixing OCR Output with Case Converter
If you've used the Image to Text OCR tool to extract text from a scanned document, the extracted text sometimes has inconsistent capitalization — especially if the original document used decorative ALL CAPS headings or inconsistent styling. Run the extracted text through the Case Converter to normalize capitalization before using it.
Related Tools on ConvertLinx
- Word Counter — count words and characters in your converted text
- Text to Slug — convert text to URL-friendly slug format (kebab-case)
- Lorem Ipsum Generator — generate placeholder text in any case format
- Text to PDF — save your case-converted text as a PDF
Convert any text to any case style instantly — free, no signup, one click.
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